BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain superfamily; Proteins in this superfamily are characterized by the presence of a common protein-protein interaction motif of about 100 amino acids, known as the BTB/POZ domain. Members include transcription factors, oncogenic proteins, ion channel proteins, and potassium channel tetramerization domain (KCTD) proteins. They have been identified in poxviruses and many eukaryotes, and have diverse functions, such as transcriptional regulation, chromatin remodeling, protein degradation and cytoskeletal regulation. Many BTB/POZ proteins contain one or two additional domains, such as kelch repeats, zinc-finger domains, FYVE (Fab1, YOTB, Vac1, and EEA1) fingers, or ankyrin repeats, among others. These special additional domains or interaction partners provide unique characteristics and functions to BTB/POZ proteins. In ion channel proteins and KCTD proteins, the BTB/POZ domain is also called the tetramerization (T1) domain.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSAPLPLPPATGGAAPNPATttaasssssss 91
Cdd:cd18195      1 HAGALLLQLNEQRLRGLFCDVTLIAGDTKFRAHRSVLAASSPYFRELLSSPLPLGAAAVAAAPGATQSP----------- 69

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   92 sssssssssasssssssssspppasppasspPRVLELPGVPAAAFSDVLNFIYSARLALPggggDGAAVAEIGALGRRLG 171
Cdd:cd18195     70 -------------------------------ERVLELPGVKAGVFSDVLNFIYSSRVALP----GSAAAKELGAAGKRLG 114

                          170
                   ....*....|
gi 2462556655  172 ISRLQGLGEG 181
Cdd:cd18195    115 IPFLQGLEGG 124

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 4 (ZBTB4); ZBTB4, also called KAISO-like zinc finger protein 1 (KAISO-L1), is a transcriptional repressor with bimodal DNA-binding specificity. It binds with a higher affinity to methylated CpG dinucleotides in the consensus sequence 5'-CGCG-3' but can also bind to the non-methylated consensus sequence 5'-CTGCNA-3', also known as the consensus kaiso binding site (KBS). It can also bind specifically to a single methyl-CpG pair and can bind hemimethylated DNA but with a lower affinity compared to methylated DNA. ZBTB4 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSAPLPLPPATGGAAPNPATttaasssssss 91
Cdd:cd18195      1 HAGALLLQLNEQRLRGLFCDVTLIAGDTKFRAHRSVLAASSPYFRELLSSPLPLGAAAVAAAPGATQSP----------- 69

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   92 sssssssssasssssssssspppasppasspPRVLELPGVPAAAFSDVLNFIYSARLALPggggDGAAVAEIGALGRRLG 171
Cdd:cd18195     70 -------------------------------ERVLELPGVKAGVFSDVLNFIYSSRVALP----GSAAAKELGAAGKRLG 114

                          170
                   ....*....|
gi 2462556655  172 ISRLQGLGEG 181
Cdd:cd18195    115 IPFLQGLEGG 124

Broad-Complex, Tramtrack and Bric a brac; Domain in Broad-Complex, Tramtrack and Bric a brac. Also known as POZ (poxvirus and zinc finger) domain. Known to be a protein-protein interaction motif found at the N-termini of several C2H2-type transcription factors as well as Shaw-type potassium channels. Known structure reveals a tightly intertwined dimer formed via interactions between N-terminal strand and helix structures. However in a subset of BTB/POZ domains, these two secondary structures appear to be missing. Be aware SMART predicts BTB/POZ domains without the beta1- and alpha1-secondary structures.

                            10        20        30
                    ....*....|....*....|....*....|..
gi 2462556655    31 DVTLIAGDTKFPAHRSVLAASSPFFReALLTS 62
Cdd:smart00225    1 DVTLVVGGKKFHAHKAVLAAHSPYFK-ALFSS 31

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 4 (ZBTB4); ZBTB4, also called KAISO-like zinc finger protein 1 (KAISO-L1), is a transcriptional repressor with bimodal DNA-binding specificity. It binds with a higher affinity to methylated CpG dinucleotides in the consensus sequence 5'-CGCG-3' but can also bind to the non-methylated consensus sequence 5'-CTGCNA-3', also known as the consensus kaiso binding site (KBS). It can also bind specifically to a single methyl-CpG pair and can bind hemimethylated DNA but with a lower affinity compared to methylated DNA. ZBTB4 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSAPLPLPPATGGAAPNPATttaasssssss 91
Cdd:cd18195      1 HAGALLLQLNEQRLRGLFCDVTLIAGDTKFRAHRSVLAASSPYFRELLSSPLPLGAAAVAAAPGATQSP----------- 69

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   92 sssssssssasssssssssspppasppasspPRVLELPGVPAAAFSDVLNFIYSARLALPggggDGAAVAEIGALGRRLG 171
Cdd:cd18195     70 -------------------------------ERVLELPGVKAGVFSDVLNFIYSSRVALP----GSAAAKELGAAGKRLG 114

                          170
                   ....*....|
gi 2462556655  172 ISRLQGLGEG 181
Cdd:cd18195    115 IPFLQGLEGG 124

BTB/POZ domain; The BTB (for BR-C, ttk and bab) or POZ (for Pox virus and Zinc finger) domain is present near the N-terminus of a fraction of zinc finger (pfam00096) proteins and in proteins that contain the pfam01344 motif such as Kelch and a family of pox virus proteins. The BTB/POZ domain mediates homomeric dimerization and in some instances heteromeric dimerization. The structure of the dimerized PLZF BTB/POZ domain has been solved and consists of a tightly intertwined homodimer. The central scaffolding of the protein is made up of a cluster of alpha-helices flanked by short beta-sheets at both the top and bottom of the molecule. POZ domains from several zinc finger proteins have been shown to mediate transcriptional repression and to interact with components of histone deacetylase co-repressor complexes including N-CoR and SMRT. The POZ or BTB domain is also known as BR-C/Ttk or ZiN.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|...
gi 2462556655   20 LNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFReALLTS 62
Cdd:pfam00651    1 LNELREQGELCDVTLVVGDKEFRAHKAVLAACSPYFK-ALFSG 42

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 21 (ZBTB21); ZBTB21, also called zinc finger protein 295 (ZNF295), is a transcription repressor that acts in a selective manner on different promoters. It may be involved in the bi-directional control of gene expression in concert with another transcription factor ZFP161. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|.
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFrEALLTS 62
Cdd:cd18209      1 HAISLLSALNEERLKGQLCDVLLIVGDQKFRAHKNVLAASSEYF-QSLFTE 50

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in nucleus accumbens-associated protein 1 (NAC-1); NAC-1, also called BTB/POZ domain-containing protein 14B (BTBD14B), is a transcriptional repressor that contributes to tumor progression, tumor cell proliferation, and survival. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSAP--LPLPPA 70
Cdd:cd18290      8 PNFGNSILECLNEQRLQGLYCDVSVVVKGHAFKAHRAVLAASSSYFRDLFNSSRSavVELPAA 70

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 32 (KLHL32); KLHL32, also called BTB and kelch domain-containing protein 5 (BKLHD5), contains a BTB domain and kelch repeats, characteristics of a kelch family protein. Its function remains unclear. Deletion of KLHL32 may be ssociated with Tourette syndrome and obsessive-compulsive disorder. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*.
gi 2462556655   11 SHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFR 56
Cdd:cd18261     10 SHKDAVLAALNQQRNDGILCDITLVAEEQKFHAHKAVLAACSDYFR 55

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing proteins, ZBTB3, ZBTB18, ZBTB42 and similar proteins; The family includes zinc finger and BTB domain-containing proteins, ZBTB3, ZBTB18 and ZBTB42. ZBTB3 is a transcription factor essential for cancer cell growth via the regulation of the reactive oxygen species (ROS) detoxification pathway. ZBTB18 is a sequence-specific transrepressor associated with heterochromatin. ZBTB42 is a transcriptional repressor that specifically binds DNA and probably acts by recruiting chromatin remodeling multiprotein complexes. Members of this family contain a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*.
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFF 55
Cdd:cd18194      4 PEHSRQLLQCLREQRSQGFLCDCTVLVGSAQFPAHRAVLASCSMYF 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 11 (ZBTB11); ZBTB11 is a transcriptional repressor of TP53. It is critical for basal and emergency granulopoiesis. It regulates neutrophil development through its integrase-like zinc finger domain. ZBTB11 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*.
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFRE 57
Cdd:cd18202      2 HGQTVLDQLNQQRLNNQFCDVTLLIEGEEYKAHKSVLAANSEYFRE 47

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in telomere zinc finger-associated protein (TZAP); TZAP is also called Krueppel-related zinc finger protein 3 (KR3), zinc finger and BTB domain-containing protein 48 (ZBTB48), or zinc finger protein 855 (ZNF855). It is a vertebrate telomere-binding protein involved in telomere length control. It directly binds the telomeric double-stranded 5'-TTAGGG-3' repeat. TZAP also acts as a transcription regulator that binds to promoter regions. It is a transcriptional activator of alternate reading frame (ARF) gene. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREAL--LTSAPLPLPPATGGA 74
Cdd:cd18232      1 HSVKVLQALNKQREEGQYCDATLDVGGRVFKAHWSVLACCSHFFQSLYgdGTSGSVVLPESFAEV 65

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 25 (KLHL25); KLHL25, also called ectoderm-neural cortex protein 2 (ENC-2), is a substrate-specific adaptor of a BCR (BTB-CUL3-RBX1) E3 ubiquitin ligase complex that is required for translational homeostasis. The BCR(KLHL25) ubiquitin ligase complex acts by mediating ubiquitination of hypophosphorylated EIF4EBP1 (4E-BP1). Cullin3-KLHL25 ubiquitin ligase also targets ATP-citrate lyase (ACLY), a key enzyme for lipid synthesis, for degradation to inhibit lipid synthesis and tumor progression. KLHL25 contains a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|..
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFrEALLT 61
Cdd:cd18254      3 PSHPDCVLTHLNTLRKQCMFTDVTLWAGNRSFPCHRAVLAACSRYF-EAMFS 53

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 7B (ZBTB7B); ZBTB7B is also called Krueppel-related zinc finger protein cKrox, T-helper-inducing POZ/Krueppel-like factor, zinc finger and BTB domain-containing protein 15 (ZBTB15), zinc finger protein 67 (ZNF67), Zfp67, zinc finger protein 857B (ZNF857B), or zinc finger protein Th-POK. It is a transcriptional regulator of extracellular matrix gene expression. It plays widespread and critical roles in T-cell development, particularly as the master regulator of CD4 commitment. It also plays a role as a potent driver of brown fat development and thermogenesis, as well as cold-induced beige fat formation. ZBTB7B contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREaLLTSAPLPLPPATGGAAPN 77
Cdd:cd18327      6 PEHSSELLSCLNEQRRAGLLCDLTIKTRGLEYRTHRAVLAACSLYFRK-LFTGGGGGSGDLGAGGGQD 72

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Influenza virus NS1A-binding protein (NS1-BP); NS1-BP is also called NS1-binding protein, aryl hydrocarbon receptor-associated protein 3 (ARA3), or IVNS1ABP. It is a novel protein that interacts with the influenza A virus nonstructural NS1 protein, which is relocalized in the nuclei of infected cells. It plays a role in cell division and in the dynamic organization of the actin skeleton as a stabilizer of actin filaments by association with F-actin through its kelch repeats. It also interacts with alpha-enolase/MBP-1 and is involved in c-Myc gene transcriptional control. NS1-BP contains BTB and BACK domains at the N-terminal region and kelch repeats at the C-terminal region. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*.
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFRE 57
Cdd:cd18306      1 HPESVLAKLNALRKNRQFCDVILQVGGHEIPAHRAVLACASPYLFE 46

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 26 (KLHL26); KLHL26 is encoded by the klhl26 gene, which is regulated by p53 via fuzzy tandem repeats. It contains a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|..
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFReALLTSA 63
Cdd:cd18255      1 HSVTLLQGLNALRAKGQLLDVTLIADGQRFQAHKVVLASCSDYFR-AMFTGG 51

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 7C (ZBTB7C); ZBTB7C is also called affected by papillomavirus DNA integration in ME180 cells protein 1 (APM-1), zinc finger and BTB domain-containing protein 36 (ZBTB36), zinc finger protein 857C (ZNF857C), or kidney cancer-related POZ domain and Kruppel-like protein (Kr-POK). It is a transcriptional repressor with a pro-oncogenic role that relies upon binding to p53 and inhibition of its transactivation function. It may act as an important regulator of fatty acid synthesis and may induce rapid cancer cell proliferation by increasing palmitate synthesis. The ZBTB7C gene has been identified as a susceptibility gene to ischemic injury. ZBTB7C contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*.
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREaLLTSAPL 65
Cdd:cd18328      6 PNHSSEVLCSLNEQRHDGLLCDVVLIVQDQEYRTHRSVLAACSKYFKK-LFTAGTL 60

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in hypermethylated in cancer 2 protein (Hic-2); Hic-2 is also called HIC1-related gene on chromosome 22 protein (HRG22), Hic-3, or zinc finger and BTB domain-containing protein 30 (ZBTB30). It is a homolog of tumor suppressor Hic-1. It functions as a transcriptional regulator. It is a dosage-dependent regulator of cardiac development located within the distal 22q11 deletion syndrome region. Hic-2 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|.
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALL 60
Cdd:cd18334      2 PNHAKQLLLQLNQQRAKGFLCDVIIVVENALFRAHKNILAASSMYFKSLVL 52

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 1 (ZBTB1); ZBTB1 acts as a transcriptional repressor that represses cAMP-responsive element (CRE)-mediated transcriptional activation. It also has a role in translesion DNA synthesis, and is essential for lymphocyte development. ZBTB1 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*..
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFR 56
Cdd:cd18192      2 PSHSSYVLQQLNNQREWGFLCDCCIAIDDIYFQAHKAVLAACSSYFR 48

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 12 (KLHL12); KLHL12, also called CUL3-interacting protein 1 (C3IP1) or DKIR homolog, is a substrate-specific adaptor of a BCR (BTB-CUL3-RBX1) E3 ubiquitin ligase complex that acts as a negative regulator of the Wnt signaling pathway and ER-Golgi transport. It contains a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|..
gi 2462556655   11 SHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFrEALLTS 62
Cdd:cd18242      3 SHAKSILNTMNSLRKSNTLCDVTLRVEGKEFPAHRIVLAACSDYF-CAMFTS 53

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 12 (ZBTB12); ZBTB12, also called protein G10, may be involved in transcriptional regulation. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|.
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALL 60
Cdd:cd18203      6 PGHEAATLRNMNQLRSEERFCDVTIVADSLKFRGHKVVLAACSPFLRDQFL 56

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 9 (ZBTB9); ZBTB9 may be involved in transcriptional regulation. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*....
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALL 60
Cdd:cd18200      1 YSSALLETLNKHRLEGKFCDLSVHVQGRVFRAHKAVLAASSPYFHDKLL 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 17 (ZBTB17); ZBTB1 is also called c-Myc-interacting zinc finger protein 1 (Miz-1), zinc finger protein 151, or zinc finger protein 60. It is a poly-Cys2His2 zinc finger (ZF) transcription factor that can function as an activator or repressor depending on its binding partners, and by targeting negative regulators of cell cycle progression. ZBTB17 has been implicated in cardiomyopathy and is important in cardiac stress response. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*..
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFR 56
Cdd:cd18206      3 PQHSQHVLEQLNQQRQLGLLCDCTFVVDGVDFKAHKAVLAACSEYFR 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like ECH-associated protein 1 (KEAP1); KEAP1, also called cytosolic inhibitor of Nrf2 (INrf2) or Kelch-like protein 19 (KLHL19), is a redox-regulated substrate adaptor protein for a Cullin3-dependent ubiquitin ligase complex that targets NFE2L2/NRF2 for ubiquitination and degradation by the proteasome, thus resulting in the suppression of its transcriptional activity and the repression of antioxidant response element-mediated detoxifying enzyme gene expression. It contains a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*.
gi 2462556655   11 SHAPAVLRQLNEQRLRGLFCDVTLIAG----DTKFPAHRSVLAASSPFFReALLTS 62
Cdd:cd18248      3 DHTKEAFQIMNELRLSQQLCDVTLKVKyqdpKEEFMAHKVVLASSSPYFK-AMFTS 57

BTB (Broad-Complex, Tramtrack and Bric a brac) /POZ (poxvirus and zinc finger) domain found in Drosophila melanogaster proteins bric-a-brac 1 (BAB1), bric-a-brac 2 (BAB2), modifier of mdg4 (doom), and similar proteins; BAB1 and BAB2 probably act as transcriptional regulators that are required for specification of the tarsal segment and are involved in antenna development. Doom is a product of the Drosophila mod(mdg4) gene. It induces apoptosis and binds to baculovirus inhibitor-of-apoptosis proteins. This subfamily also includes Drosophila melanogaster sex determination protein fruitless (FRU), protein jim lovell (LOV), zinc finger protein chinmo, transcription factor GAGA, transcription factor Ken, and longitudinals lacking proteins (LOLA). FRU probably acts as a transcriptional regulator that plays a role in male courtship behavior and sexual orientation, and enhances male-specific expression of takeout in brain-associated fat body. LOV, also called tyrosine kinase-related (TKR), has a regulatory role during midline cell development. Chinmo is a functional effector of the JAK/STAT pathway that regulates eye development, tumor formation, and stem cell self-renewal in Drosophila. GAGA is a transcriptional activator that functions by regulating chromatin structure. Ken, also termed protein Ken and Barbie, is a transcription factor required for Terminalia development. LOLA proteins are putative transcription factors required for axon growth and guidance in the central and peripheral nervous systems. Proteins in this subfamily contain a BTB domain. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|
gi 2462556655   29 FCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSAPLPLP 68
Cdd:cd18315      1 LVDVTLACEGGSLKAHKLVLAAASPYFAALLKETPPDEHP 40

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 11 (KLHL11); KLHL11 is a component of a cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex that mediates the ubiquitination of target proteins, leading most often to their proteasomal degradation. It contains a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*...
gi 2462556655   11 SHAPAVLRQLNEQRLRGLFCDVTLI---AGDTKFPAHRSVLAASSPFF 55
Cdd:cd18241      5 SHCSELSWRQNEQRKQGLFCDITLAfggAGGREFRAHRSVLAAATEYF 52

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 43 (ZBTB43); ZBTB43, also called zinc finger and BTB domain-containing protein 22B (ZBTB22b), zinc finger protein 297B (ZNF297B), or ZnF-x, may be involved in transcriptional regulation. It interacts with BDP1, a subunit of transcription factor IIIB (TFIIIB). Since BDP1 is essential in Pol III transcription, ZBTB43 may also regulate these transcriptional pathways. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60
                   ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALL--TSAPLPLP 68
Cdd:cd18227      6 PDFSSTILQKLNQQRQQGQLCDISVVVQGHLFRAHKAVLAASSPYFCDQVLlkNSRRIVLP 66

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 18 (ZBTB18); ZBTB18 is also called 58 kDa repressor protein (RP58), transcriptional repressor RP58, translin-associated zinc finger protein 1 (TAZ-1), zinc finger protein 238 (ZNF238), or zinc finger protein C2H2-171. It is a sequence-specific transrepressor associated with heterochromatin. It plays a role in various developmental processes such as myogenesis and brain development. It specifically binds the consensus DNA sequence 5'-[AC]ACATCTG[GT][AC]-3' which contains the E box core, and acts by recruiting chromatin remodeling multiprotein complexes. ZBTB18 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*.
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFF 55
Cdd:cd18324      4 PDHSRHLLQCLSEQRHQGFLCDCTVLVGDAQFRAHRAVLASCSMYF 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 8A (ZBTB8A); ZBTB8A, also called BTB/POZ and zinc-finger domain-containing factor or BTB/POZ and zinc-finger domains factor on chromosome 1 (BOZ-F1), is a novel proto-oncoprotein that stimulates cell proliferation. It binds to all the proximal GC boxes to repress transcription, and it inhibits p53 acetylation without affecting p53 stability. It may be involved in gastric adenocarcinoma cell differentiation, cancer invasion, and metastasis. ZBTB8A contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|...
gi 2462556655   11 SHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSA 63
Cdd:cd18329      3 SHQSRLLQQLDEQRKQELFCDCSILVEGQVFKAHRNVLFASSGYFKMLLSQNA 55

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in POZ-, AT hook-, and zinc finger-containing protein 1 (PATZ1); PATZ1 is also called zinc finger and BTB domain-containing protein 19 (ZBTB19), BTB/POZ domain zinc finger transcription factor, protein kinase A RI subunit alpha-associated protein, zinc finger protein 278, or zinc finger sarcoma gene protein. It is an important transcriptional regulatory factor that regulates divergent pathways depending on the cellular context. For instance, it acts as a transcriptional suppressor that functions in T lymphocytes. It is also a DNA damage-responsive transcription factor that inhibits p53 function. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*....
gi 2462556655   12 HAPAVLRQLNEQRLRG-LFCDVTLIAGDTKFPAHRSVLAASSPFFREAL 59
Cdd:cd18207      9 HSADMLHNLNQQRKSGgRFCDVLLRVGEESFPAHRAVLAACSEYFESVF 57

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 28 (KLHL28); KLHL28, also called BTB/POZ domain-containing protein 5 (BTBD5), contains a BTB domain and kelch repeats, characteristics of a kelch family protein. Its function remains unclear. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFReALLT 61
Cdd:cd18257      1 HSEQLLQGLNLLRQHHELCDVVLRVGDVKIHAHKVVLASCSPYFK-AMFT 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 2 (KLHL2); KLHL2, also called actin-binding protein Mayven, is a novel actin-binding protein predominantly expressed in the brain. It plays a role in the reorganization of the actin cytoskeleton, and promotes growth of cell projections in oligodendrocyte precursors. KLHL2 is a component of a cullin-RING-based BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex that mediates the ubiquitination of target proteins, such as NPTXR, leading most often to their proteasomal degradation. It contains a BTB domain and kelch repeat domains, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|...
gi 2462556655    9 DPSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFrEALLT 61
Cdd:cd18338      1 NPRHMKKAFKVMNELRSQNLLCDVTIVAEDVEIAAHRVVLAACSPYF-HAMFT 52

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in BTB and CNC homolog 2 (BACH2); BACH2, also called BTB-basic leucine zipper transcription factor 2, belongs to the cap 'n' collar (CNC) and basic leucine zipper (bZIP) factor family. BACH2 is a lymphoid-specific transcription factor with a prominent role in B-cell development. It is transcriptionally regulated by the BCR/ABL oncogene. It represses the anti-apoptotic factor heme oxygenase-1 (HO-1). It is also a potent general repressor of effector differentiation in naive T cells. Moreover, BACH2 is required for pulmonary surfactant homeostasis and alveolar macrophage function. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|..
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALLTSA 63
Cdd:cd18278     14 HCTNILLCLNDQRKQDILCDVTLIVEGKEFRAHRAVLAACSEYFLQALVGQT 65

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 3 (KLHL3); KLHL3 is a component of an E3 ubiquitin ligase complex that regulates blood pressure by targeting With-No-Lysine (WNK) kinases for degradation. It contains a BTB domain and kelch repeat domains, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*..
gi 2462556655    9 DPSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFF 55
Cdd:cd18339      1 NPAHMKKAFKVMNELRSKQLLCDVTIVAEDVEIEAHRVVLAACSPYF 47

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 34 (ZBTB34); ZBTB34 acts as a transcriptional regulator. It downregulates specificity protein (Sp) transcription factors Sp1, Sp3, and Sp4 in pancreatic cancer cells. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*...
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFRE 57
Cdd:cd18220      6 PEYSNTVLSQLNELRLQGKLCDIIVHIQGQPFRAHKAVLAASSPYFRD 53

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 8 (ZBTB8); There are two ZBTB8 isoforms: ZBTB8A and ZBTB8B. ZBTB8A is a novel proto-oncoprotein that stimulates cell proliferation. ZBTB8B may be involved in transcriptional regulation. They both contain a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFReALLT 61
Cdd:cd18199      1 HQSRLLGQLNEQRKQDFFCDCSIIVEGRIFKAHRNVLFASSGYFR-MLLS 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in BTB and CNC homolog 1 (BACH1); BACH1, also called BTB-basic leucine zipper transcription factor 1, belongs to the cap 'n' collar (CNC) and basic leucine zipper (bZIP) factor family. It can act as repressor or activator. BACH1 is a heme-responsive transcriptional repressor of heme oxygenase (HO)-1. It represses genes involved in heme metabolism and oxidative stress response. It is also a negative regulator of nuclear factor erythroid 2-related factor 2 (Nrf2) that controls antioxidant response elements (ARE)-dependent gene expressions. BACH1 binds to NF-E2 binding sites in vitro, and plays important roles in coordinating transcription activation and repression by MafK. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFF 55
Cdd:cd18277     10 HSTNVLLSLNDQRKKDVLCDVTILVEGQRFRAHRSVLAACSSYF 53

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like proteins KLHL9 and KLHL13; KLHL9 and KLHL13 (also called BTB and kelch domain-containing protein 2, or BKLHD2) are substrate-specific adaptors of a BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex required for mitotic progression and cytokinesis. The BCR(KLHL9-KLHL13) E3 ubiquitin ligase complex mediates the ubiquitination of AURKB and controls the dynamic behavior of AURKB on mitotic chromosomes, thereby coordinating faithful mitotic progression and completion of cytokinesis. They contain a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|....*.
gi 2462556655    8 TDPSHAPAVLRQLNEQRLRGLFCDVTLIAGDT--KFPAHRSVLAASSPFFReALLT 61
Cdd:cd18239      2 TSNTHSSVVLQGFDQLRGEGLLCDVTLVPGDGdeTFPVHRAMMASASDYFK-AMFT 56

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 46 (ZBTB46); ZBTB46 is also called BTB-ZF protein expressed in effector lymphocytes (BZEL), BTB/POZ domain-containing protein 4 (BTBD4), or zinc finger protein 340 (ZNF340). It is a conventional dendritic cell (cDC) lineage specific transcription factor that acts as a negative regulator required to prevent activation of classical dendritic cells in the steady state. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*..
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFR 56
Cdd:cd18230      2 TSHYRHLLRELNEQRQHGILCDVCIIVEGKIFKAHKNVLLGSSRYFK 48

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 35 (KLHL35); KLHL35 contains a BTB domain and kelch repeats, characteristics of a kelch family protein. Its function remains unclear. Significant differences in DNA methylation of the KLHL35 gene in abdominal aortic aneurysm (AAA) patients compared to non-AAA controls suggest a potential role in AAA pathology. Hypermethylation of the KLHL35 gene has also been associated with the development of hepatocellular carcinoma. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*..
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFR 56
Cdd:cd18265      4 PCHAERILQVLNAYRRSGTFTDVVLLVDGKDFPCHRATLSANSAYFR 50

first BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in BTB/POZ domain-containing protein 7 (BTBD7); BTBD7 is a crucial regulator that is essential for region-specific epithelial cell dynamics and branching morphogenesis. It has been implicated in various cancers. BTBD7 contains two BTB domains. This model corresponds to the first domain. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30
                   ....*....|....*....|....*....|....*..
gi 2462556655   29 FC-DVTLIAGDTKFPAHRSVLAASSPFFREaLLTSAP 64
Cdd:cd18283      1 YCtDVDLVFQGTCFPVHRAILSARCPFFRD-LLSSSP 36

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in B-cell CLL/lymphoma 6 member B protein (BCL6B); BCL6B is also called Bcl6-associated zinc finger protein, zinc finger protein 62, or zinc finger and BTB domain-containing protein 28 (ZBTB28). It is a sequence-specific transcriptional repressor in association with BCL-6. It may function in a narrow stage or be related to some events in the early B-cell development. BCL6B plays an important role as a potential tumor suppressor in gastric cancer; it is found preferentially methylated in gastric cancer. It also inhibits both colorectal cancer growth and hepatocellular carcinoma metastases. BCL6B contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60        70
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 2462556655   12 HAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALL-------TSAPLPLPPATGGAAP 76
Cdd:cd18332      2 HSSDVLLNLNELRKRDILTDVTLLVGGTPLRAHKAVLIACSGFFYSIFSgrvgegvSVLTLPSGLEARGFQL 73

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in BTB/POZ domain-containing protein 9 (BTBD9); BTBD9 is a risk factor for Restless Legs Syndrome (RLS) encoding a Cullin-3 substrate adaptor. The BTBD9 gene may be associated with antipsychotic-induced RLS in schizophrenia. Mutations in BTBD9 lead to reduced dopamine, increased locomotion and sleep fragmentation. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2462556655   29 FCDVTLIAGDTKFPAHRSVLAASSPFFReALLtsaplplppaTGGAApnpatttaassssssssssssssssasssssss 108
Cdd:cd18287     22 YSDVTFVVEEKRFPAHRVILAARSEYFR-ALL----------YGGMR--------------------------------- 57

                           90       100       110       120
                   ....*....|....*....|....*....|....*....|..
gi 2462556655  109 ssspppasppaSSPPRVLELPGVPAAAFSDVLNFIYSARLAL 150
Cdd:cd18287     58 -----------ESQQSEIELKDTNAEAFKALLKYIYTGRLTL 88

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in Kelch-like protein 8 (KLHL8); KLHL8 is a substrate-specific adaptor of a BCR (BTB-CUL3-RBX1) E3 ubiquitin ligase complex required for the ubiquitination and degradation of rapsyn, a postsynaptic protein required for clustering of nicotinic acetylcholine receptors (nAChRs) at the neuromuscular junction. It contains a BTB domain and kelch repeats, characteristics of a kelch family protein. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*..
gi 2462556655   16 VLRQLNEQrlrGLFCDVTLIAGDTKFPAHRSVLAASSPFFReALLTS 62
Cdd:cd18238      5 VLHQFYEN---GELCDVTLKVGEKSIHCHRLVLACVSPYFR-AMFTS 47

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 40 (ZBTB40); ZBTB40 may be involved in transcriptional regulation. Single-nucleotide polymorphisms of ZBTB40 are associated with bone mineral density in European and East-Asian populations. ZBTB40 contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|
gi 2462556655   10 PSHAPAVLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREAL 59
Cdd:cd18225      4 PNYSRQLLQQLHTLRKEQQFCDCTIFIGTFHFRAHKLVLAASSLLFKSLL 53

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in zinc finger and BTB domain-containing protein 8B (ZBTB8B); ZBTB8B may be involved in transcriptional regulation. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*
gi 2462556655   16 VLRQLNEQRLRGLFCDVTLIAGDTKFPAHRSVLAASSPFFREALL 60
Cdd:cd18330      5 LLGELNEQRKRDFFCDCSIIVEGRIFKAHRNILFANSGYFRALLI 49

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in BTB and CNC homolog (BACH) proteins; This subfamily includes BACH1 (also called BTB-basic leucine zipper transcription factor 1), BACH2 (also called BTB-basic leucine zipper transcription factor 2), and similar proteins. They belong to the cap 'n' collar (CNC) and basic leucine zipper (bZIP) factor family. BACH1 is a heme-responsive transcriptional repressor of heme oxygenase (HO)-1. It represses genes involved in heme metabolism and oxidative stress response. BACH2 is a lymphoid-specific transcription factor with a prominent role in B-cell development. It is transcriptionally regulated by the BCR/ABL oncogene. It represses the anti-apoptotic factor heme oxygenase-1 (HO-1). Subfamily members contain a BTB domain and a basic leucine zipper (bZIP) domain. The BTB/POZ domain is a common protein-protein interaction motif of about 100 amino acids.

                           10        20        30
                   ....*....|....*....|....*....|....*
gi 2462556655   30 CDVTLIAGDTKFPAHRSVLAASSPFFREALLTSAP 64
Cdd:cd18955      2 CDVTIVVEDQRFRAHRAVLAACSDYFLSRVVGQTD 36