RNA recognition motif (RRM) found in alkylated DNA repair protein alkB homolog 8 (ALKBH8) and similar proteins; This subfamily corresponds to the RRM of ALKBH8, also termed alpha-ketoglutarate-dependent dioxygenase ABH8, or S-adenosyl-L-methionine-dependent tRNA methyltransferase ABH8, expressed in various types of human cancers. It is essential in urothelial carcinoma cell survival mediated by NOX-1-dependent ROS signals. ALKBH8 has also been identified as a tRNA methyltransferase that catalyzes methylation of tRNA to yield 5-methylcarboxymethyl uridine (mcm5U) at the wobble position of the anticodon loop. Thus, ALKBH8 plays a crucial role in the DNA damage survival pathway through a distinct mechanism involving the regulation of tRNA modification. ALKBH8 localizes to the cytoplasm. It contains the characteristic AlkB domain that is composed of a tRNA methyltransferase motif, a motif homologous to the bacterial AlkB DNA/RNA repair enzyme, and a dioxygenase catalytic core domain encompassing cofactor-binding sites for iron and 2-oxoglutarate. In addition, unlike other AlkB homologs, ALKBH8 contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal S-adenosylmethionine (SAM)-dependent methyltransferase (MT) domain.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2217285543  45 TQSLVVANGGLGNGVSRNQLLPVLEKCGLVDALLMPPNKPYSFARYRTTEESKRAYVTLNGKEvVDDLGQKITLYLNFVE 124
Cdd:cd12431     1 TQHLVVANGGLGNGVSREQLLEVFEKYGTVEDIVMLPGKPYSFVSFKSVEEAAKAYNALNGKE-LELPQQNVPLYLSFVE 79

                  .
gi 2217285543 125 K 125
Cdd:cd12431    80 K 80

Alkylated DNA repair protein alkB homolog 8, N-terminal; This domain is the N-terminal domain of Alkylated DNA repair protein alkB homolog 8 (ALKBH8) and its homologs. This domain corresponds to the basic alpha-helix located at the N-terminal of the RRM domain, which enhances its RNA binding affinity.

                          10        20        30
                  ....*....|....*....|....*....|....*...
gi 2217285543   4 MDSNHQSNYKLSKTEKKFLRKQIKAKH-TLLRHEGIET 40
Cdd:pfam09004   1 WTTNTTSLLKKAQQRLYFLRKLKKANHpTLFYHEGIES 38

RNA recognition motif (RRM) found in alkylated DNA repair protein alkB homolog 8 (ALKBH8) and similar proteins; This subfamily corresponds to the RRM of ALKBH8, also termed alpha-ketoglutarate-dependent dioxygenase ABH8, or S-adenosyl-L-methionine-dependent tRNA methyltransferase ABH8, expressed in various types of human cancers. It is essential in urothelial carcinoma cell survival mediated by NOX-1-dependent ROS signals. ALKBH8 has also been identified as a tRNA methyltransferase that catalyzes methylation of tRNA to yield 5-methylcarboxymethyl uridine (mcm5U) at the wobble position of the anticodon loop. Thus, ALKBH8 plays a crucial role in the DNA damage survival pathway through a distinct mechanism involving the regulation of tRNA modification. ALKBH8 localizes to the cytoplasm. It contains the characteristic AlkB domain that is composed of a tRNA methyltransferase motif, a motif homologous to the bacterial AlkB DNA/RNA repair enzyme, and a dioxygenase catalytic core domain encompassing cofactor-binding sites for iron and 2-oxoglutarate. In addition, unlike other AlkB homologs, ALKBH8 contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal S-adenosylmethionine (SAM)-dependent methyltransferase (MT) domain.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2217285543  45 TQSLVVANGGLGNGVSRNQLLPVLEKCGLVDALLMPPNKPYSFARYRTTEESKRAYVTLNGKEvVDDLGQKITLYLNFVE 124
Cdd:cd12431     1 TQHLVVANGGLGNGVSREQLLEVFEKYGTVEDIVMLPGKPYSFVSFKSVEEAAKAYNALNGKE-LELPQQNVPLYLSFVE 79

                  .
gi 2217285543 125 K 125
Cdd:cd12431    80 K 80

Alkylated DNA repair protein alkB homolog 8, N-terminal; This domain is the N-terminal domain of Alkylated DNA repair protein alkB homolog 8 (ALKBH8) and its homologs. This domain corresponds to the basic alpha-helix located at the N-terminal of the RRM domain, which enhances its RNA binding affinity.

                          10        20        30
                  ....*....|....*....|....*....|....*...
gi 2217285543   4 MDSNHQSNYKLSKTEKKFLRKQIKAKH-TLLRHEGIET 40
Cdd:pfam09004   1 WTTNTTSLLKKAQQRLYFLRKLKKANHpTLFYHEGIES 38

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 2217285543  53 GGLGNGVSRNQLLPVLEKCGLV-DALLMPPN----KPYSFARYRTTEESKRAYVTLNGKEV 108
Cdd:pfam00076   4 GNLPPDTTEEDLKDLFSKFGPIkSIRLVRDEtgrsKGFAFVEFEDEEDAEKAIEALNGKEL 64

RNA recognition motif (RRM) found in alkylated DNA repair protein alkB homolog 8 (ALKBH8) and similar proteins; This subfamily corresponds to the RRM of ALKBH8, also termed alpha-ketoglutarate-dependent dioxygenase ABH8, or S-adenosyl-L-methionine-dependent tRNA methyltransferase ABH8, expressed in various types of human cancers. It is essential in urothelial carcinoma cell survival mediated by NOX-1-dependent ROS signals. ALKBH8 has also been identified as a tRNA methyltransferase that catalyzes methylation of tRNA to yield 5-methylcarboxymethyl uridine (mcm5U) at the wobble position of the anticodon loop. Thus, ALKBH8 plays a crucial role in the DNA damage survival pathway through a distinct mechanism involving the regulation of tRNA modification. ALKBH8 localizes to the cytoplasm. It contains the characteristic AlkB domain that is composed of a tRNA methyltransferase motif, a motif homologous to the bacterial AlkB DNA/RNA repair enzyme, and a dioxygenase catalytic core domain encompassing cofactor-binding sites for iron and 2-oxoglutarate. In addition, unlike other AlkB homologs, ALKBH8 contains an N-terminal RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal S-adenosylmethionine (SAM)-dependent methyltransferase (MT) domain.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2217285543  45 TQSLVVANGGLGNGVSRNQLLPVLEKCGLVDALLMPPNKPYSFARYRTTEESKRAYVTLNGKEvVDDLGQKITLYLNFVE 124
Cdd:cd12431     1 TQHLVVANGGLGNGVSREQLLEVFEKYGTVEDIVMLPGKPYSFVSFKSVEEAAKAYNALNGKE-LELPQQNVPLYLSFVE 79

                  .
gi 2217285543 125 K 125
Cdd:cd12431    80 K 80

Alkylated DNA repair protein alkB homolog 8, N-terminal; This domain is the N-terminal domain of Alkylated DNA repair protein alkB homolog 8 (ALKBH8) and its homologs. This domain corresponds to the basic alpha-helix located at the N-terminal of the RRM domain, which enhances its RNA binding affinity.

                          10        20        30
                  ....*....|....*....|....*....|....*...
gi 2217285543   4 MDSNHQSNYKLSKTEKKFLRKQIKAKH-TLLRHEGIET 40
Cdd:pfam09004   1 WTTNTTSLLKKAQQRLYFLRKLKKANHpTLFYHEGIES 38

RNA recognition motif 1 (RRM1) found in heterogeneous nuclear ribonucleoprotein R (hnRNP R) and similar proteins; This subfamily corresponds to the RRM1 in hnRNP R, hnRNP Q, APOBEC-1 complementation factor (ACF), and dead end protein homolog 1 (DND1). hnRNP R is a ubiquitously expressed nuclear RNA-binding protein that specifically binds mRNAs with a preference for poly(U) stretches. It has been implicated in mRNA processing and mRNA transport, and also acts as a regulator to modify binding to ribosomes and RNA translation. hnRNP Q is also a ubiquitously expressed nuclear RNA-binding protein. It has been identified as a component of the spliceosome complex, as well as a component of the apobec-1 editosome, and has been implicated in the regulation of specific mRNA transport. ACF is an RNA-binding subunit of a core complex that interacts with apoB mRNA to facilitate C to U RNA editing. It may also act as an apoB mRNA recognition factor and chaperone, and play a key role in cell growth and differentiation. DND1 is essential for maintaining viable germ cells in vertebrates. It interacts with the 3'-untranslated region (3'-UTR) of multiple messenger RNAs (mRNAs) and prevents micro-RNA (miRNA) mediated repression of mRNA. This family also includes two functionally unknown RNA-binding proteins, RBM46 and RBM47. All members in this family, except for DND1, contain three conserved RNA recognition motifs (RRMs); DND1 harbors only two RRMs.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 2217285543  53 GGLGNGVSRNQLLPVLEKCGLVDA--LLMPP---NKPYSFARYRTTEESKRAYVTLNGKEV 108
Cdd:cd12249     7 GKIPRDVFEDELVPLFEKCGKIYElrLMMDFsglNRGYAFVTYTNKEAAQRAVKTLNNYEI 67

RNA recognition motif (RRM) found in eukaryotic RNA-binding protein 18 and similar proteins; This subfamily corresponds to the RRM of RBM18, a putative RNA-binding protein containing a well-conserved RNA recognition motif (RRM), also termed RBD (RNA binding domain) or RNP (ribonucleoprotein domain). The biological role of RBM18 remains unclear.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 2217285543  53 GGLGNGVSRNQLLPVLEKCGLVDALLMPPNK---------PYSFARYRTTEESKRAYVTLNGKEVvddLGQKI 116
Cdd:cd12355     5 GNLDPRLTEYHLLKLLSKYGKIKKFDFLFHKtgplkgqprGYCFVTFETKEEAEKAIECLNGKLA---LGKKL 74

RNA recognition motif 3 (RRM3) found in nucleolysin TIAR and similar proteins; This subgroup corresponds to the RRM3 of nucleolysin TIAR, also termed TIA-1-related protein, a cytotoxic granule-associated RNA-binding protein that shows high sequence similarity with 40-kDa isoform of T-cell-restricted intracellular antigen-1 (p40-TIA-1). 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. TIAR possesses nucleolytic activity against cytolytic lymphocyte (CTL) target cells. It can trigger DNA fragmentation in permeabilized thymocytes, and thus may function as an effector responsible for inducing apoptosis. TIAR is 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. It interacts with RNAs containing short stretches of uridylates and its RRM2 can mediate the specific binding to uridylate-rich RNAs.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*.
gi 2217285543  53 GGLGNGVSRNQLLPVLEKCGLVDALLMPPNKPYSFARYRTTEESKRAYVTLNGKEV 108
Cdd:cd12620     6 GGIASGLTEQLMRQTFSPFGQIMEIRVFPEKGYSFVRFSTHESAAHAIVSVNGTTI 61