RNA recognition motif (RRM) found in peroxisome proliferator-activated receptor gamma coactivator-related protein 1 (PRC) and similar proteins; This subgroup corresponds to the RRM of PRC, also termed PGC-1-related coactivator, one of the members of PGC-1 transcriptional coactivators family, including peroxisome proliferator-activated receptor gamma coactivators PGC-1alpha and PGC-1beta. Unlike PGC-1alpha and PGC-1beta, PRC is ubiquitous and more abundantly expressed in proliferating cells than in growth-arrested cells. PRC has been implicated in the regulation of several metabolic pathways, mitochondrial biogenesis, and cell growth. It functions as a growth-regulated transcriptional cofactor activating many nuclear genes specifying mitochondrial respiratory function. PRC directly interacts with nuclear transcriptional factors implicated in respiratory chain expression including nuclear respiratory factors 1 and 2 (NRF-1 and NRF-2), CREB (cAMP-response element-binding protein), and estrogen-related receptor alpha (ERRalpha). It interacts indirectly with the NRF-2beta subunit through host cell factor (HCF), a cellular protein involved in herpes simplex virus (HSV) infection and cell cycle regulation. Furthermore, like PGC-1alpha and PGC-1beta, PRC can transactivate a number of NRF-dependent nuclear genes required for mitochondrial respiratory function, including those encoding cytochrome c, 5-aminolevulinate synthase, Tfam, and TFB1M, and TFB2M. Further research indicates that PRC may also act as a sensor of metabolic stress that orchestrates a redox-sensitive program of inflammatory gene expression. PRC is a multi-domain protein containing an N-terminal activation domain, an LXXLL coactivator signature, a central proline-rich region, a tetrapeptide motif (DHDY) responsible for HCF binding, a C-terminal arginine/serine-rich (SR) domain, and an RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1519 ERRVVFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDNYGFVTYRYAEEAFAAIESGHKLRQADEQPFDLCFGGRR 1598
Cdd:cd12624     1 ERRVVYIGKIRGRMTRSELKDRFSVFGEIEECTIHFREEGDNYGFVTYRYTEDAFAAIENGHKLRRPDELPFDLCFGGRR 80

                          90
                  ....*....|.
gi 755563210 1599 QFCKRSYSDLD 1609
Cdd:cd12624    81 QFCKSSYADLD 91

large tegument protein UL36; Provisional

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  984 SVPTGRAVPPTPVEPSGDPAGPPEDVLPGPVTPSLSSGPASPAAPPVEPTKPEAQPVPVSPQPKHKvstlvqspqiKAPP 1063
Cdd:PHA03247 2590 DAPPQSARPRAPVDDRGDPRGPAPPSPLPPDTHAPDPPPPSPSPAANEPDPHPPPTVPPPERPRDD----------PAPG 2659

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1064 TLSTEGVVFEESVSERLKSETQENRPKEKPISTA-IKSVPVPKQSAVAKLPAVHPArlrkLSFLPTPraQGPEDVVQAFI 1142
Cdd:PHA03247 2660 RVSRPRRARRLGRAAQASSPPQRPRRRAARPTVGsLTSLADPPPPPPTPEPAPHAL----VSATPLP--PGPAAARQASP 2733

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1143 SEIGIEASDLSSLLEQFEKSEAKKECPLPASADSLAVGNSGSIDIPQEkkpldRLQAPELANVAGLTPPATPPHQLWKPL 1222
Cdd:PHA03247 2734 ALPAAPAPPAVPAGPATPGGPARPARPPTTAGPPAPAPPAAPAAGPPR-----RLTRPAVASLSESRESLPSPWDPADPP 2808

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1223 AAVSLLAKAKSPKSTAQEGTLKPEGITEAKPPATACLQEGAHSPSPVHVGSGDhdycVRSRTPPKRMPALVISEvgSRWN 1302
Cdd:PHA03247 2809 AAVLAPAAALPPAASPAGPLPPPTSAQPTAPPPPPGPPPPSLPLGGSVAPGGD----VRRRPPSRSPAAKPAAP--ARPP 2882

                         330       340       350       360       370       380       390
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 755563210 1303 VKRhqdiTIKPVLSLGSAAPPLPctATSQEPLDHRTSVEQADPSAPCFAPSTLLSPEASPCRSEMNARTPPEPSDKQQ 1380
Cdd:PHA03247 2883 VRR----LARPAVSRSTESFALP--PDQPERPPQPQAPPPPQPQPQPPPPPQPQPPPPPPPRPQPPLAPTTDPAGAGE 2954

RNA recognition motif (RRM) found in peroxisome proliferator-activated receptor gamma coactivator-related protein 1 (PRC) and similar proteins; This subgroup corresponds to the RRM of PRC, also termed PGC-1-related coactivator, one of the members of PGC-1 transcriptional coactivators family, including peroxisome proliferator-activated receptor gamma coactivators PGC-1alpha and PGC-1beta. Unlike PGC-1alpha and PGC-1beta, PRC is ubiquitous and more abundantly expressed in proliferating cells than in growth-arrested cells. PRC has been implicated in the regulation of several metabolic pathways, mitochondrial biogenesis, and cell growth. It functions as a growth-regulated transcriptional cofactor activating many nuclear genes specifying mitochondrial respiratory function. PRC directly interacts with nuclear transcriptional factors implicated in respiratory chain expression including nuclear respiratory factors 1 and 2 (NRF-1 and NRF-2), CREB (cAMP-response element-binding protein), and estrogen-related receptor alpha (ERRalpha). It interacts indirectly with the NRF-2beta subunit through host cell factor (HCF), a cellular protein involved in herpes simplex virus (HSV) infection and cell cycle regulation. Furthermore, like PGC-1alpha and PGC-1beta, PRC can transactivate a number of NRF-dependent nuclear genes required for mitochondrial respiratory function, including those encoding cytochrome c, 5-aminolevulinate synthase, Tfam, and TFB1M, and TFB2M. Further research indicates that PRC may also act as a sensor of metabolic stress that orchestrates a redox-sensitive program of inflammatory gene expression. PRC is a multi-domain protein containing an N-terminal activation domain, an LXXLL coactivator signature, a central proline-rich region, a tetrapeptide motif (DHDY) responsible for HCF binding, a C-terminal arginine/serine-rich (SR) domain, and an RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1519 ERRVVFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDNYGFVTYRYAEEAFAAIESGHKLRQADEQPFDLCFGGRR 1598
Cdd:cd12624     1 ERRVVYIGKIRGRMTRSELKDRFSVFGEIEECTIHFREEGDNYGFVTYRYTEDAFAAIENGHKLRRPDELPFDLCFGGRR 80

                          90
                  ....*....|.
gi 755563210 1599 QFCKRSYSDLD 1609
Cdd:cd12624    81 QFCKSSYADLD 91

RNA recognition motif;

                            10        20        30        40        50        60        70
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 755563210   1522 VVFIGKIPGRMTRSELKQRFSVFGEIEECTIHF---RVQGDNYGFVTYRYAEEAFAAIES-------GHKLR 1583
Cdd:smart00360    1 TLFVGNLPPDTTEEELRELFSKFGKVESVRLVRdkeTGKSKGFAFVEFESEEDAEKALEAlngkeldGRPLK 72

RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain); The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteriztic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 755563210  1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDN--YGFVTYRYAEEAFAAIES--GHKLRQ 1584
Cdd:pfam00076    1 LFVGNLPPDTTEEDLKDLFSKFGPIKSIRLVRDETGRSkgFAFVEFEDEEDAEKAIEAlnGKELGG 66

RNA recognition motif (RRM) domain [Translation, ribosomal structure and biogenesis];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1524 FIGKIPGRMTRSELKQRFSVFGEIEECTI---HF--RVQGdnYGFVTYRYAEEAFAAIEsghKLRQADeqpfdlcFGGRR 1598
Cdd:COG0724     5 YVGNLPYSVTEEDLRELFSEYGEVTSVKLitdREtgRSRG--FGFVEMPDDEEAQAAIE---ALNGAE-------LMGRT 72

Chitinase [Carbohydrate transport and metabolism];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  895 TQYAPVPPWSCYPSVSPPGYSCLPPPPTMPIVSGTPGTYAVPPTCNVPWVPPPAPVSPYSSSCAYGSLGWGPGLQqppFW 974
Cdd:COG3469    72 TSSTTSTTATATAAAAAATSTSATLVATSTASGANTGTSTVTTTSTGAGSVTSTTSSTAGSTTTSGASATSSAGS---TT 148

                          90       100       110       120       130       140       150
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 755563210  975 STVSPPPLSSVPTGRAVPPTPVEPSGDPAGPPedvlpgpVTPSLSSGPASPAAPPVEPTKPEAQPVPVSPQPKHKV 1050
Cdd:COG3469   149 TTTTVSGTETATGGTTTTSTTTTTTSASTTPS-------ATTTATATTASGATTPSATTTATTTGPPTPGLPKHVL 217

RNA recognition motif (RRM) found in peroxisome proliferator-activated receptor gamma coactivator-related protein 1 (PRC) and similar proteins; This subgroup corresponds to the RRM of PRC, also termed PGC-1-related coactivator, one of the members of PGC-1 transcriptional coactivators family, including peroxisome proliferator-activated receptor gamma coactivators PGC-1alpha and PGC-1beta. Unlike PGC-1alpha and PGC-1beta, PRC is ubiquitous and more abundantly expressed in proliferating cells than in growth-arrested cells. PRC has been implicated in the regulation of several metabolic pathways, mitochondrial biogenesis, and cell growth. It functions as a growth-regulated transcriptional cofactor activating many nuclear genes specifying mitochondrial respiratory function. PRC directly interacts with nuclear transcriptional factors implicated in respiratory chain expression including nuclear respiratory factors 1 and 2 (NRF-1 and NRF-2), CREB (cAMP-response element-binding protein), and estrogen-related receptor alpha (ERRalpha). It interacts indirectly with the NRF-2beta subunit through host cell factor (HCF), a cellular protein involved in herpes simplex virus (HSV) infection and cell cycle regulation. Furthermore, like PGC-1alpha and PGC-1beta, PRC can transactivate a number of NRF-dependent nuclear genes required for mitochondrial respiratory function, including those encoding cytochrome c, 5-aminolevulinate synthase, Tfam, and TFB1M, and TFB2M. Further research indicates that PRC may also act as a sensor of metabolic stress that orchestrates a redox-sensitive program of inflammatory gene expression. PRC is a multi-domain protein containing an N-terminal activation domain, an LXXLL coactivator signature, a central proline-rich region, a tetrapeptide motif (DHDY) responsible for HCF binding, a C-terminal arginine/serine-rich (SR) domain, and an RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1519 ERRVVFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDNYGFVTYRYAEEAFAAIESGHKLRQADEQPFDLCFGGRR 1598
Cdd:cd12624     1 ERRVVYIGKIRGRMTRSELKDRFSVFGEIEECTIHFREEGDNYGFVTYRYTEDAFAAIENGHKLRRPDELPFDLCFGGRR 80

                          90
                  ....*....|.
gi 755563210 1599 QFCKRSYSDLD 1609
Cdd:cd12624    81 QFCKSSYADLD 91

RNA recognition motif (RRM) found in peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1alpha, or PPARGC-1-alpha) and similar proteins; This subgroup corresponds to the RRM of PGC-1alpha, also termed PPARGC-1-alpha, or ligand effect modulator 6, a member of a family of transcription coactivators that plays a central role in the regulation of cellular energy metabolism. As an inducible transcription coactivator, PGC-1alpha can interact with a broad range of transcription factors involved in a wide variety of biological responses, such as adaptive thermogenesis, skeletal muscle fiber type switching, glucose/fatty acid metabolism, and heart development. PGC-1alpha stimulates mitochondrial biogenesis and promotes oxidative metabolism. It participates in the regulation of both carbohydrate and lipid metabolism and plays a role in disorders such as obesity, diabetes, and cardiomyopathy. PGC-1alpha is a multi-domain protein containing an N-terminal activation domain region, a central region involved in the interaction with at least a nuclear receptor, and a C-terminal domain region. The N-terminal domain region consists of three leucine-rich motifs (L1, NR box 2 and 3), among which the two last are required for interaction with nuclear receptors, potential nuclear localization signals (NLS), and a proline-rich region overlapping a putative repression domain. The C-terminus of PGC-1alpha is composed of two arginine/serine-rich regions (SR domains), a putative dimerization domain, and an RNA recognition motif (RRM), also known as RBD (RNA binding domain) or RNP (ribonucleoprotein domain). PGC-1alpha could interact favorably with single-stranded RNA.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1519 ERRVVFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDNYGFVTYRYAEEAFAAIESGHKLRQADEQPFDLCFGGRR 1598
Cdd:cd12623     1 ERRVIYVGKIRPDITRTELKRRFEVFGEIEECTVNLRDDGDSYGFITYRYTCDAFAALENGYTLRRSNEPDFELCFGGRK 80

                          90
                  ....*....|.
gi 755563210 1599 QFCKRSYSDLD 1609
Cdd:cd12623    81 QFCKSNYADLD 91

large tegument protein UL36; Provisional

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  578 EGDSPAVGNAAPgDQASSGTELVGSLPVGPNLTSPVLADKKGIEPaVAIPTSDNLSPADVLANTVAADPVPndPAPADPv 657
Cdd:PHA03247 2485 EARFPFAAGAAP-DPGGGGPPDPDAPPAPSRLAPAILPDEPVGEP-VHPRMLTWIRGLEELASDDAGDPPP--PLPPAA- 2559

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  658 lvkcRPTDPRRAAAAAAAAAQGSRPSLQSADHPKVVSPEGKDVVGPLKVEGSTSATTQEAK------------PRPLSLS 725
Cdd:PHA03247 2560 ----PPAAPDRSVPPPRPAPRPSEPAVTSRARRPDAPPQSARPRAPVDDRGDPRGPAPPSPlppdthapdpppPSPSPAA 2635

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  726 EYRQRRQQRQTEAEDRNSQPPVVGKwPSLPETPTELADIPclVPSAPARKTAPQRSPIAV-PETVSVGSNPVSPTPEPSA 804
Cdd:PHA03247 2636 NEPDPHPPPTVPPPERPRDDPAPGR-VSRPRRARRLGRAA--QASSPPQRPRRRAARPTVgSLTSLADPPPPPPTPEPAP 2712

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  805 SKLMVSTHSEQVSSHEMPLAVRPPPPPLPSVSPAGPI-PSTVPAPLPPFPPSVPPLLPLPSGGHGVPRLPPPPLQPPGLP 883
Cdd:PHA03247 2713 HALVSATPLPPGPAAARQASPALPAAPAPPAVPAGPAtPGGPARPARPPTTAGPPAPAPPAAPAAGPPRRLTRPAVASLS 2792

                         330       340       350       360       370       380       390       400
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  884 VSMRQMP--PDPYTQYAPVPPWSCYPSVSPPGYSCLPPPPTMPIVSGTPGTYAVPPTcnvpwvpppapvspySSSCAYGS 961
Cdd:PHA03247 2793 ESRESLPspWDPADPPAAVLAPAAALPPAASPAGPLPPPTSAQPTAPPPPPGPPPPS---------------LPLGGSVA 2857

                         410       420       430       440       450       460       470       480
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  962 LGwGPGLQQPPFWSTVSPPPLSSVPTGRAVPPTPVEPSGDPAGPPEDVLPGPVTPSLSSGPASPAAPPVEPTK---PEAQ 1038
Cdd:PHA03247 2858 PG-GDVRRRPPSRSPAAKPAAPARPPVRRLARPAVSRSTESFALPPDQPERPPQPQAPPPPQPQPQPPPPPQPqppPPPP 2936

                         490       500       510       520       530       540       550
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 755563210 1039 PVPVSPQPKHKVSTLVQSPQIKAPPTLSTEGVVFEESVSERLKSETQENRPKEKPISTAIKSVPVPKQSAVAKLPAVH 1116
Cdd:PHA03247 2937 PRPQPPLAPTTDPAGAGEPSGAVPQPWLGALVPGRVAVPRFRVPQPAPSREAPASSTPPLTGHSLSRVSSWASSLALH 3014

RNA recognition motif;

                            10        20        30        40        50        60        70
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 755563210   1522 VVFIGKIPGRMTRSELKQRFSVFGEIEECTIHF---RVQGDNYGFVTYRYAEEAFAAIES-------GHKLR 1583
Cdd:smart00360    1 TLFVGNLPPDTTEEELRELFSKFGKVESVRLVRdkeTGKSKGFAFVEFESEEDAEKALEAlngkeldGRPLK 72

RNA recognition motif 1 (RRM1) and 2 (RRM2) found in CELF/Bruno-like family of RNA binding proteins and plant flowering time control protein FCA; This subfamily corresponds to the RRM1 and RRM2 domains of the CUGBP1 and ETR-3-like factors (CELF) as well as plant flowering time control protein FCA. CELF, also termed BRUNOL (Bruno-like) proteins, is a family of structurally related RNA-binding proteins involved in regulation of pre-mRNA splicing in the nucleus, and control of mRNA translation and deadenylation in the cytoplasm. The family contains six members: CELF-1 (also known as BRUNOL-2, CUG-BP1, NAPOR, EDEN-BP), CELF-2 (also known as BRUNOL-3, ETR-3, CUG-BP2, NAPOR-2), CELF-3 (also known as BRUNOL-1, TNRC4, ETR-1, CAGH4, ER DA4), CELF-4 (BRUNOL-4), CELF-5 (BRUNOL-5) and CELF-6 (BRUNOL-6). They all contain three highly conserved RNA recognition motifs (RRMs), also known as RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains): two consecutive RRMs (RRM1 and RRM2) situated in the N-terminal region followed by a linker region and the third RRM (RRM3) close to the C-terminus of the protein. The low sequence conservation of the linker region is highly suggestive of a large variety in the co-factors that associate with the various CELF family members. Based on both, sequence similarity and function, the CELF family can be divided into two subfamilies, the first containing CELFs 1 and 2, and the second containing CELFs 3, 4, 5, and 6. The different CELF proteins may act through different sites on at least some substrates. Furthermore, CELF proteins may interact with each other in varying combinations to influence alternative splicing in different contexts. This subfamily also includes plant flowering time control protein FCA that functions in the posttranscriptional regulation of transcripts involved in the flowering process. FCA contains two RRMs, and a WW protein interaction domain.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 755563210 1524 FIGKIPGRMTRSELKQRFSVFGEIEECTIhfrVQGDNYG------FVTYRYAEEAFAAIESGH 1580
Cdd:cd12361     3 FVGMIPKTASEEDVRPLFEQFGNIEEVQI---LRDKQTGqskgcaFVTFSTREEALRAIEALH 62

RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain); The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteriztic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 755563210  1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDN--YGFVTYRYAEEAFAAIES--GHKLRQ 1584
Cdd:pfam00076    1 LFVGNLPPDTTEEDLKDLFSKFGPIKSIRLVRDETGRSkgFAFVEFEDEEDAEKAIEAlnGKELGG 66

RNA recognition motif 2 (RRM2) found in plant flowering time control protein FCA and similar proteins; This subgroup corresponds to the RRM2 of FCA, a gene controlling flowering time in Arabidopsis, which encodes a flowering time control protein that functions in the posttranscriptional regulation of transcripts involved in the flowering process. The flowering time control protein FCA contains two RNA recognition motifs (RRMs), also known as RBDs (RNA binding domains) or RNP (ribonucleoprotein domains), and a WW protein interaction domain.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*...
gi 755563210 1524 FIGKIPGRMTRSELKQRFSVFGEIEECTI---HFRVQGDNYGFVTYRYAEEAFAAIES 1578
Cdd:cd12637     3 FVGSLPKTATEQEVRDLFEAYGEVEEVYLmkdPVTQQGTGCAFVKFAYKEEALAAIRS 60

RNA recognition motif 2 (RRM2) found in yeast meiotic activator RIM4 and similar proteins; This subfamily corresponds to the RRM2 of RIM4, also termed regulator of IME2 protein 4, a putative RNA binding protein that is expressed at elevated levels early in meiosis. It functions as a meiotic activator required for both the IME1- and IME2-dependent pathways of meiotic gene expression, as well as early events of meiosis, such as meiotic division and recombination, in Saccharomyces cerevisiae. RIM4 contains two RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains). The family also includes a putative RNA-binding protein termed multicopy suppressor of sporulation protein Msa1. It is a putative RNA-binding protein encoded by a novel gene, msa1, from the fission yeast Schizosaccharomyces pombe. Msa1 may be involved in the inhibition of sexual differentiation by controlling the expression of Ste11-regulated genes, possibly through the pheromone-signaling pathway. Like RIM4, Msa1 also contains two RRMs, both of which are essential for the function of Msa1.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 755563210 1519 ERRVVFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDN-YGFVTYRYAEEAFAAIES 1578
Cdd:cd12454     2 DKLSIFVGQLDPKTTDSELFRRFSKYGKIVDCKLIKRPEPVNaFAFLRFESEEAAEAAVEE 62

RNA recognition motif 1 (RRM1) found in the Hu proteins family; This subfamily corresponds to the RRM1 of the Hu proteins family which represents a group of RNA-binding proteins involved in diverse biological processes. Since the Hu proteins share high homology with the Drosophila embryonic lethal abnormal vision (ELAV) protein, the Hu family is sometimes referred to as the ELAV family. Drosophila ELAV is exclusively expressed in neurons and is required for the correct differentiation and survival of neurons in flies. The neuronal members of the Hu family include Hu-antigen B (HuB or ELAV-2 or Hel-N1), Hu-antigen C (HuC or ELAV-3 or PLE21), and Hu-antigen D (HuD or ELAV-4), which play important roles in neuronal differentiation, plasticity and memory. HuB is also expressed in gonads. Hu-antigen R (HuR or ELAV-1 or HuA) is the ubiquitously expressed Hu family member. It has a variety of biological functions mostly related to the regulation of cellular response to DNA damage and other types of stress. HuR has an anti-apoptotic function during early cell stress response. It binds to mRNAs and enhances the expression of several anti-apoptotic proteins, such as p21waf1, p53, and prothymosin alpha. HuR also has pro-apoptotic function by promoting apoptosis when cell death is unavoidable. Furthermore, HuR may be important in muscle differentiation, adipogenesis, suppression of inflammatory response and modulation of gene expression in response to chronic ethanol exposure and amino acid starvation. Hu proteins perform their cytoplasmic and nuclear molecular functions by coordinately regulating functionally related mRNAs. In the cytoplasm, Hu proteins recognize and bind to AU-rich RNA elements (AREs) in the 3' untranslated regions (UTRs) of certain target mRNAs, such as GAP-43, vascular epithelial growth factor (VEGF), the glucose transporter GLUT1, eotaxin and c-fos, and stabilize those ARE-containing mRNAs. They also bind and regulate the translation of some target mRNAs, such as neurofilament M, GLUT1, and p27. In the nucleus, Hu proteins function as regulators of polyadenylation and alternative splicing. Each Hu protein contains three RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains). RRM1 and RRM2 may cooperate in binding to an ARE. RRM3 may help to maintain the stability of the RNA-protein complex, and might also bind to poly(A) tails or be involved in protein-protein interactions.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 755563210 1528 IPGRMTRSELKQRFSVFGEIEECT-IHFRVQGDN--YGFVTYRYAEEAFAAIESGHKLR 1583
Cdd:cd12650     8 LPQNMTQDEIRSLFSSIGEIESCKlIRDKVTGQSlgYGFVNYVDPSDAEKAINTLNGLR 66

RNA recognition motif 1 (RRM1) found in heterogeneous nuclear ribonucleoprotein hnRNP A and hnRNP D subfamilies and similar proteins; This subfamily corresponds to the RRM1 in the hnRNP A subfamily which includes hnRNP A0, hnRNP A1, hnRNP A2/B1, hnRNP A3 and similar proteins. hnRNP A0 is a low abundance hnRNP protein that has been implicated in mRNA stability in mammalian cells. hnRNP A1 is an abundant eukaryotic nuclear RNA-binding protein that may modulate splice site selection in pre-mRNA splicing. hnRNP A2/B1 is an RNA trafficking response element-binding protein that interacts with the hnRNP A2 response element (A2RE). hnRNP A3 is also a RNA trafficking response element-binding protein that participates in the trafficking of A2RE-containing RNA. The hnRNP A subfamily is characterized by two RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), followed by a long glycine-rich region at the C-terminus. The hnRNP D subfamily includes hnRNP D0, hnRNP A/B, hnRNP DL and similar proteins. hnRNP D0 is a UUAG-specific nuclear RNA binding protein that may be involved in pre-mRNA splicing and telomere elongation. hnRNP A/B is an RNA unwinding protein with a high affinity for G- followed by U-rich regions. hnRNP A/B has also been identified as an APOBEC1-binding protein that interacts with apolipoprotein B (apoB) mRNA transcripts around the editing site and thus, plays an important role in apoB mRNA editing. hnRNP DL (or hnRNP D-like) is a dual functional protein that possesses DNA- and RNA-binding properties. It has been implicated in mRNA biogenesis at the transcriptional and post-transcriptional levels. All members in this subfamily contain two putative RRMs and a glycine- and tyrosine-rich C-terminus. The family also contains DAZAP1 (Deleted in azoospermia-associated protein 1), RNA-binding protein Musashi homolog Musashi-1, Musashi-2 and similar proteins. They all harbor two RRMs.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIHF-----RVQGdnYGFVTYRYAEEAFAAIESG-HKL--RQAD 1586
Cdd:cd12325     1 LFVGGLSWETTEESLREYFSKYGEVVDCVVMKdpatgRSRG--FGFVTFKDPSSVDAVLAARpHTLdgRTID 70

RNA recognition motif 1 (RRM1) and 2 (RRM2) found in RRM-containing coactivator activator/modulator (CoAA) and similar proteins; This subfamily corresponds to the RRM in CoAA (also known as RBM14 or PSP2) and RNA-binding protein 4 (RBM4). CoAA is a heterogeneous nuclear ribonucleoprotein (hnRNP)-like protein identified as a nuclear receptor coactivator. It mediates transcriptional coactivation and RNA splicing effects in a promoter-preferential manner, and is enhanced by thyroid hormone receptor-binding protein (TRBP). CoAA contains two N-terminal RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a TRBP-interacting domain. RBM4 is a ubiquitously expressed splicing factor with two isoforms, RBM4A (also known as Lark homolog) and RBM4B (also known as RBM30), which are very similar in structure and sequence. RBM4 may also function as a translational regulator of stress-associated mRNAs as well as play a role in micro-RNA-mediated gene regulation. RBM4 contains two N-terminal RRMs, a CCHC-type zinc finger, and three alanine-rich regions within their C-terminal regions. This family also includes Drosophila RNA-binding protein lark (Dlark), a homolog of human RBM4. It plays an important role in embryonic development and in the circadian regulation of adult eclosion. Dlark shares high sequence similarity with RBM4 at the N-terminal region. However, Dlark has three proline-rich segments instead of three alanine-rich segments within the C-terminal region.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIhfrVQgdNYGFVTYRYAEEAFAAIESGHK 1581
Cdd:cd12343     2 IFVGNLPDAATSEELRALFEKYGKVTECDI---VK--NYAFVHMEKEEDAEDAIKALNG 55

RNA recognition motif 3 (RRM3) found in yeast nuclear and cytoplasmic polyadenylated RNA-binding protein PUB1 and similar proteins; This subfamily corresponds to the RRM3 of yeast protein PUB1, also termed ARS consensus-binding protein ACBP-60, or poly uridylate-binding protein, or poly(U)-binding protein. PUB1 has been identified as both, a heterogeneous nuclear RNA-binding protein (hnRNP) and a cytoplasmic mRNA-binding protein (mRNP), which may be stably bound to a translationally inactive subpopulation of mRNAs within the cytoplasm. PUB1 is distributed in both, the nucleus and the cytoplasm, and binds to poly(A)+ RNA (mRNA or pre-mRNA). Although it is one of the major cellular proteins cross-linked by UV light to polyadenylated RNAs in vivo, PUB1 is nonessential for cell growth in yeast. PUB1 also binds to T-rich single stranded DNA (ssDNA); however, there is no strong evidence implicating PUB1 in the mechanism of DNA replication. PUB1 contains three RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a GAR motif (glycine and arginine rich stretch) that is located between RRM2 and RRM3.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*...
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEEctihFRVQGDN-YGFVTYRYAEEAFAAIESG 1579
Cdd:cd12622     3 VYVGNLPPEVTQADLIPLFQNFGVIEE----VRVQRDKgFGFVKYDTHEEAALAIQQL 56

DNA polymerase III subunits gamma and tau; Validated

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210  978 SPPPLSSVPTGRAVPPTPVEPSGDPAGPPEDVLPGPVTPSLSSGPASPAAPPVEPTKPEAQPVPVSPQPkhkvSTLVQSP 1057
Cdd:PRK07764  391 AGAPAAAAPSAAAAAPAAAPAPAAAAPAAAAAPAPAAAPQPAPAPAPAPAPPSPAGNAPAGGAPSPPPA----AAPSAQP 466

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1058 QIKAPPTLSTEGVVFEESVSERLKSETQEnRPKEKPISTAIKSVPVPKQSAVAKLPAVHPARLRKLS-FLPTPRAQGPED 1136
Cdd:PRK07764  467 APAPAAAPEPTAAPAPAPPAAPAPAAAPA-APAAPAAPAGADDAATLRERWPEILAAVPKRSRKTWAiLLPEATVLGVRG 545

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1137 --VVQAF--------ISEIGIEASDLSSLLEQFEKsEAKKECplPASADSLAVGNSGSidiPQEKKPLDRLQAPELANVA 1206
Cdd:PRK07764  546 dtLVLGFstgglarrFASPGNAEVLVTALAEELGG-DWQVEA--VVGPAPGAAGGEGP---PAPASSGPPEEAARPAAPA 619

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1207 GLTPPATPPHQlwKPLAAVSLLAKAKSPKSTAQEGTLKPEGITEAK------PPATACLQEGAHSPSPVHVGSGDHDYCV 1280
Cdd:PRK07764  620 APAAPAAPAPA--GAAAAPAEASAAPAPGVAAPEHHPKHVAVPDASdggdgwPAKAGGAAPAAPPPAPAPAAPAAPAGAA 697

                         330       340       350       360       370       380       390       400
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1281 RSRTPPKRMPALVISEVGSRWNVKRHQDITIKPVLSLGSAAPPLPCTATSQEPLDHRTSVEQADPSAPCFAPSTLLSPEA 1360
Cdd:PRK07764  698 PAQPAPAPAATPPAGQADDPAAQPPQAAQGASAPSPAADDPVPLPPEPDDPPDPAGAPAQPPPPPAPAPAAAPAAAPPPS 777

                         410
                  ....*....|....*....
gi 755563210 1361 SPCRSEMNARTPPEPSDKQ 1379
Cdd:PRK07764  778 PPSEEEEMAEDDAPSMDDE 796

RNA recognition motif 2 (RRM2) found in granule-associated RNA binding proteins (p40-TIA-1 and TIAR), and yeast nuclear and cytoplasmic polyadenylated RNA-binding protein PUB1; This subfamily corresponds to the RRM3 of TIA-1, TIAR, and PUB1. Nucleolysin TIA-1 isoform p40 (p40-TIA-1 or TIA-1) and nucleolysin TIA-1-related protein (TIAR) are granule-associated RNA binding proteins involved in inducing apoptosis in cytotoxic lymphocyte (CTL) target cells. They share high sequence similarity and are expressed in a wide variety of cell types. TIA-1 can be phosphorylated by a serine/threonine kinase that is activated during Fas-mediated apoptosis.TIAR is mainly localized in the nucleus of hematopoietic and nonhematopoietic cells. It is translocated from the nucleus to the cytoplasm in response to exogenous triggers of apoptosis. Both TIA-1 and TIAR bind specifically to poly(A) but not to poly(C) homopolymers. They are composed of three N-terminal highly homologous RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a glutamine-rich C-terminal auxiliary domain containing a lysosome-targeting motif. TIA-1 and TIAR interact with RNAs containing short stretches of uridylates and their RRM2 can mediate the specific binding to uridylate-rich RNAs. The C-terminal auxiliary domain may be responsible for interacting with other proteins. In addition, TIA-1 and TIAR share a potential serine protease-cleavage site (Phe-Val-Arg) localized at the junction between their RNA binding domains and their C-terminal auxiliary domains. This subfamily also includes a yeast nuclear and cytoplasmic polyadenylated RNA-binding protein PUB1, termed ARS consensus-binding protein ACBP-60, or poly uridylate-binding protein, or poly(U)-binding protein, which has been identified as both a heterogeneous nuclear RNA-binding protein (hnRNP) and a cytoplasmic mRNA-binding protein (mRNP). It may be stably bound to a translationally inactive subpopulation of mRNAs within the cytoplasm. PUB1 is distributed in both, the nucleus and the cytoplasm, and binds to poly(A)+ RNA (mRNA or pre-mRNA). Although it is one of the major cellular proteins cross-linked by UV light to polyadenylated RNAs in vivo, PUB1 is nonessential for cell growth in yeast. PUB1 also binds to T-rich single stranded DNA (ssDNA); however, there is no strong evidence implicating PUB1 in the mechanism of DNA replication. PUB1 contains three RRMs, and a GAR motif (glycine and arginine rich stretch) that is located between RRM2 and RRM3.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIhFRVQGdnYGFVTYRYAEEAFAAI 1576
Cdd:cd12354     3 VYVGNITKGLTEALLQQTFSPFGQILEVRV-FPDKG--YAFIRFDSHEAATHAI 53

RNA recognition motif 2 (RRM2) found in TAR DNA-binding protein 43 (TDP-43) and similar proteins; This subfamily corresponds to the RRM2 of TDP-43 (also termed TARDBP), a ubiquitously expressed pathogenic protein whose normal function and abnormal aggregation are directly linked to the genetic disease cystic fibrosis, and two neurodegenerative disorders: frontotemporal lobar degeneration (FTLD) and amyotrophic lateral sclerosis (ALS). TDP-43 binds both DNA and RNA, and has been implicated in transcriptional repression, pre-mRNA splicing and translational regulation. TDP-43 is a dimeric protein with two RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a C-terminal glycine-rich domain. The RRMs are responsible for DNA and RNA binding; they bind to TAR DNA and RNA sequences with UG-repeats. The glycine-rich domain can interact with the hnRNP family proteins to form the hnRNP-rich complex involved in splicing inhibition. It is also essential for the cystic fibrosis transmembrane conductance regulator (CFTR) exon 9-skipping activity.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 755563210 1521 RVVFIGKIPGRMTRSELKQRFSVFGEIEECTI--HFRvqgdNYGFVTYRYAEEAFAAIESGHKLR 1583
Cdd:cd12322     1 RKVFVGRCTEDMTEDDLRQYFSQFGEVTDVFIpkPFR----AFAFVTFADDEVAQSLCGEDHIIK 61

RNA recognition motif (RRM) found in Pre-mRNA-splicing factor RBM22 and similar proteins; This subgroup corresponds to the RRM of RBM22 (also known as RNA-binding motif protein 22, or Zinc finger CCCH domain-containing protein 16), a newly discovered RNA-binding motif protein which belongs to the SLT11 gene family. SLT11 gene encoding protein (Slt11p) is a splicing factor in yeast, which is required for spliceosome assembly. Slt11p has two distinct biochemical properties: RNA-annealing and RNA-binding activities. RBM22 is the homolog of SLT11 in vertebrate. It has been reported to be involved in pre-splicesome assembly and to interact with the Ca2+-signaling protein ALG-2. It also plays an important role in embryogenesis. RBM22 contains a conserved RNA recognition motif (RRM), also known as RBD (RNA binding domain) or RNP (ribonucleoprotein domain), a zinc finger of the unusual type C-x8-C-x5-C-x3-H, and a C-terminus that is unusually rich in the amino acids Gly and Pro, including sequences of tetraprolines.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 755563210 1524 FIGKIPGRMTRSELKQRFSVFGEIEECTIhfrVQGDNYGFVTY--RYAEEAfAAIESGHKL 1582
Cdd:cd12224     5 YVGGLGDKITEKDLRDHFYQFGEIRSITV---VARQQCAFVQFttRQAAER-AAERTFNKL 61

RNA recognition motif 1 (RRM1) found in vertebrate RNA-binding protein 4 (RBM4); This subgroup corresponds to the RRM1 of RBM4, a ubiquitously expressed splicing factor that has two isoforms, RBM4A (also known as Lark homolog) and RBM4B (also known as RBM30), which are very similar in structure and sequence. RBM4 may function as a translational regulator of stress-associated mRNAs and also plays a role in micro-RNA-mediated gene regulation. RBM4 contains two N-terminal RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), a CCHC-type zinc finger, and three alanine-rich regions within their C-terminal regions. The C-terminal region may be crucial for nuclear localization and protein-protein interaction. The RRMs, in combination with the C-terminal region, are responsible for the splicing function of RBM4.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*...
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIHfrvqgDNYGFVTYRYAEEAFAAIESGH 1580
Cdd:cd12606     3 LFIGNLPREATEEEIRSLFEQYGKVTECDII-----KNYGFVHMEDKSAADEAIRNLH 55

RNA recognition motif (RRM) domain [Translation, ribosomal structure and biogenesis];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 755563210 1524 FIGKIPGRMTRSELKQRFSVFGEIEECTI---HF--RVQGdnYGFVTYRYAEEAFAAIEsghKLRQADeqpfdlcFGGRR 1598
Cdd:COG0724     5 YVGNLPYSVTEEDLRELFSEYGEVTSVKLitdREtgRSRG--FGFVEMPDDEEAQAAIE---ALNGAE-------LMGRT 72

RNA recognition motif 1 (RRM1) found in vertebrate RNA-binding protein 46 (RBM46); This subgroup corresponds to the RRM1 of RBM46, also termed cancer/testis antigen 68 (CT68), a putative RNA-binding protein that shows high sequence homology with heterogeneous nuclear ribonucleoprotein R (hnRNP R) and heterogeneous nuclear ribonucleoprotein Q (hnRNP Q). Its biological function remains unclear. Like hnRNP R and hnRNP Q, RBM46 contains two well-defined and one degenerated RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains).

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*..
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDN--YGFVTYRYAEEAFAAIE 1577
Cdd:cd12484     4 VFVGKIPRDMYEDELVPVFERAGKIYEFRLMMEFSGENrgYAFVMYTTKEEAQLAIK 60

RNA recognition motif 1 (RRM1) found in the Hu proteins family, Drosophila sex-lethal (SXL), and similar proteins; This subfamily corresponds to the RRM1 of Hu proteins and SXL. The Hu proteins family represents a group of RNA-binding proteins involved in diverse biological processes. Since the Hu proteins share high homology with the Drosophila embryonic lethal abnormal vision (ELAV) protein, the Hu family is sometimes referred to as the ELAV family. Drosophila ELAV is exclusively expressed in neurons and is required for the correct differentiation and survival of neurons in flies. The neuronal members of the Hu family include Hu-antigen B (HuB or ELAV-2 or Hel-N1), Hu-antigen C (HuC or ELAV-3 or PLE21), and Hu-antigen D (HuD or ELAV-4), which play important roles in neuronal differentiation, plasticity and memory. HuB is also expressed in gonads. Hu-antigen R (HuR or ELAV-1 or HuA) is ubiquitously expressed Hu family member. It has a variety of biological functions mostly related to the regulation of cellular response to DNA damage and other types of stress. Hu proteins perform their cytoplasmic and nuclear molecular functions by coordinately regulating functionally related mRNAs. In the cytoplasm, Hu proteins recognize and bind to AU-rich RNA elements (AREs) in the 3' untranslated regions (UTRs) of certain target mRNAs, such as GAP-43, vascular epithelial growth factor (VEGF), the glucose transporter GLUT1, eotaxin and c-fos, and stabilize those ARE-containing mRNAs. They also bind and regulate the translation of some target mRNAs, such as neurofilament M, GLUT1, and p27. In the nucleus, Hu proteins function as regulators of polyadenylation and alternative splicing. Each Hu protein contains three RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains). RRM1 and RRM2 may cooperate in binding to an ARE. RRM3 may help to maintain the stability of the RNA-protein complex, and might also bind to poly(A) tails or be involved in protein-protein interactions. This family also includes the sex-lethal protein (SXL) from Drosophila melanogaster. SXL governs sexual differentiation and X chromosome dosage compensation in flies. It induces female-specific alternative splicing of the transformer (tra) pre-mRNA by binding to the tra uridine-rich polypyrimidine tract at the non-sex-specific 3' splice site during the sex-determination process. SXL binds to its own pre-mRNA and promotes female-specific alternative splicing. It contains an N-terminal Gly/Asn-rich domain that may be responsible for the protein-protein interaction, and tandem RRMs that show high preference to bind single-stranded, uridine-rich target RNA transcripts.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 755563210 1525 IGKIPGRMTRSELKQRFSVFGEIEECTIHF-RVQGDN--YGFVTYRYAEEAFAAIESGHKLR 1583
Cdd:cd12375     4 VNYLPQSMTQEELRSLFGAIGPIESCKLVRdKITGQSlgYGFVNYRDPNDARKAINTLNGLD 65

RNA recognition motif 1 (RRM1) found in serine/arginine-rich splicing factor 1 (SRSF1) and similar proteins; This subgroup corresponds to the RRM1 in three serine/arginine (SR) proteins: serine/arginine-rich splicing factor 1 (SRSF1 or ASF-1), serine/arginine-rich splicing factor 9 (SRSF9 or SRp30C), and plant pre-mRNA-splicing factor SF2 (SR1). SRSF1 is a shuttling SR protein involved in constitutive and alternative splicing, nonsense-mediated mRNA decay (NMD), mRNA export and translation. It also functions as a splicing-factor oncoprotein that regulates apoptosis and proliferation to promote mammary epithelial cell transformation. SRSF9 has been implicated in the activity of many elements that control splice site selection, the alternative splicing of the glucocorticoid receptor beta in neutrophils and in the gonadotropin-releasing hormone pre-mRNA. It can also interact with other proteins implicated in alternative splicing, including YB-1, rSLM-1, rSLM-2, E4-ORF4, Nop30, and p32. Both, SRSF1 and SRSF9, contain two N-terminal RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains), and a C-terminal RS domains rich in serine-arginine dipeptides. In contrast, SF2 contains two N-terminal RRMs and a C-terminal PSK domain rich in proline, serine and lysine residues.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 755563210 1523 VFIGKIPGRMTRSELKQRFSVFGEIEECTIHFRVQGDNYGFVTYRYAEEAFAAIES-------GHKLR 1583
Cdd:cd12338     2 IYVGNLPGDIRERDIEDLFYKYGPILAIDLKNRRRGPPFAFVEFEDPRDAEDAIRGrdgydfdGYRLR 69

RNA recognition motif 1 (RRM1) found in RNA-binding protein 34 (RBM34) and similar proteins; This subfamily corresponds to the RRM1 of RBM34, a putative RNA-binding protein containing two RNA recognition motifs (RRMs), also termed RBDs (RNA binding domains) or RNPs (ribonucleoprotein domains). Although the function of RBM34 remains unclear currently, its RRM domains may participate in mRNA processing. RBM34 may act as an mRNA processing-related protein.

                          10        20        30
                  ....*....|....*....|....*....|....*
gi 755563210 1521 RVVFIGKIPGRMTRSELKQRFSVFGEIEecTIHFR 1555
Cdd:cd12394     1 RTVFVGNLPVTVKKKALKKLFKEFGKIE--SVRFR 33