BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel tetramerization domain-containing protein 20 (KCTD20); KCTD20, also called potassium channel tetramerization domain containing 20, is a positive regulator of Akt signaling. It may play an important role in regulating the death and growth of some non-nervous and nervous cells. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids. KCTD family BTB domains can adopt a wide range of oligomerization geometries, including homodimerization, tetramerization, and pentamerization.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  44 APEKVTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYVIAEGISATVFRTVLDYYKTGIINCPDGIS 123
Cdd:cd18386     1 APEKVTLIVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYEIAEGISCTVFRTVLDYYKTGIINCPDGIS 80

                          90       100
                  ....*....|....*....|....
gi 1247174024 124 IPDLRDTCDYLCINFDFNTIRCQD 147
Cdd:cd18386    81 IPDLRDTCDYLCINFDFNTIKCQD 104

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel tetramerization domain-containing protein 20 (KCTD20); KCTD20, also called potassium channel tetramerization domain containing 20, is a positive regulator of Akt signaling. It may play an important role in regulating the death and growth of some non-nervous and nervous cells. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids. KCTD family BTB domains can adopt a wide range of oligomerization geometries, including homodimerization, tetramerization, and pentamerization.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  44 APEKVTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYVIAEGISATVFRTVLDYYKTGIINCPDGIS 123
Cdd:cd18386     1 APEKVTLIVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYEIAEGISCTVFRTVLDYYKTGIINCPDGIS 80

                          90       100
                  ....*....|....*....|....
gi 1247174024 124 IPDLRDTCDYLCINFDFNTIRCQD 147
Cdd:cd18386    81 IPDLRDTCDYLCINFDFNTIKCQD 104

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        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024   48 VTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNftrpnEKGEYVIaeGISATVFRTVLDYYKTGIINCPDGiSIPDL 127
Cdd:smart00225   2 VTLVVGGKKFHAHKAVLAAHSPYFKALFSSDFKESD-----KSEIYLD--DVSPEDFRALLNFLYTGKLDLPEE-NVEEL 73

                   ....*....
gi 1247174024  128 RDTCDYLCI 136
Cdd:smart00225  74 LELADYLQI 82

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel tetramerization domain-containing protein 20 (KCTD20); KCTD20, also called potassium channel tetramerization domain containing 20, is a positive regulator of Akt signaling. It may play an important role in regulating the death and growth of some non-nervous and nervous cells. It contains a BTB/POZ domain, a common protein-protein interaction motif of about 100 amino acids. KCTD family BTB domains can adopt a wide range of oligomerization geometries, including homodimerization, tetramerization, and pentamerization.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  44 APEKVTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYVIAEGISATVFRTVLDYYKTGIINCPDGIS 123
Cdd:cd18386     1 APEKVTLIVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYEIAEGISCTVFRTVLDYYKTGIINCPDGIS 80

                          90       100
                  ....*....|....*....|....
gi 1247174024 124 IPDLRDTCDYLCINFDFNTIRCQD 147
Cdd:cd18386    81 IPDLRDTCDYLCINFDFNTIKCQD 104

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel tetramerization domain-containing protein 20 (KCTD20) and BTB/POZ domain-containing protein 10 (BTBD10); KCTD20, also termed potassium channel tetramerization domain containing 20, is a positive regulator of Akt signaling. It may play an important role in regulating the death and growth of some non-nervous and nervous cells. BTBD10, also termed glucose metabolism-related protein 1 (GMRP1), plays a major role as an activator of AKT family members. It binds to Akt and protein phosphatase 2A (PP2A) and inhibits the PP2A-mediated dephosphorylation of Akt, thereby keeping Akt activated. It also plays a role in preventing motor neuronal death and accelerating the growth of pancreatic beta cells.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  46 EKVTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGREYNFTRPNEKGEYVIAEGISATVFRTVLDYYKTGIINCPDGISIP 125
Cdd:cd18318     1 EKVTLVVDGTRFVVDPSLFTAHPDTMLGRMFGSGLENNFTRPNERGEYEVADGISATVFRAILDYYKTGIIRCPPSVSVA 80

                          90
                  ....*....|..
gi 1247174024 126 DLRDTCDYLCIN 137
Cdd:cd18318    81 ELREACDYLLIP 92

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in voltage-gated potassium (Kv) channels and potassium channel tetramerization domain-containing (KCTD) proteins; This family includes two protein groups: voltage-gated potassium (Kv) channels and potassium channel tetramerization domain-containing (KCTD) proteins. Kv channels are membrane proteins with fundamental physiological roles. They are responsible for a variety of electrical phenomena, such as the repolarization of the action potential, spike frequency adaptation, synaptic repolarization, and smooth muscle contraction. KCTD proteins play crucial roles in a variety of fundamental biological processes, such as protein ubiquitination and degradation, suppression of proliferation or transcription, cytoskeleton regulation, tetramerization and gating of ion channels, and others. All family members contain the BTB/POZ domain, also known as tetramerization (T1) domain, which is a versatile protein-protein interaction motif that facilitates homodimerization or heterodimerization.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  48 VTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGREynFTRPNEKGEYVIAEgiSATVFRTVLDYYKTGIINCPDGISIPDL 127
Cdd:cd18187     1 VVLNVSGTRFVTNRQTLTRHPDTLLGRMFKPGRE--FTFPNETGEYFIDR--DPTVFRTILNYYRTGKLNCPDGISIPDL 76

                  ....*..
gi 1247174024 128 RDTCDYL 134
Cdd:cd18187    77 REECDFY 83

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in voltage-gated potassium (Kv) channels; Voltage-gated potassium (Kv) channels are composed of alpha subunits, which form the actual conductance pore, and beta subunits, which are auxiliary proteins that associate with alpha subunits to modulate the activity of the Kv channel. This family includes several groups of alpha subunits such as KCNA/Kv1 family of Shaker-type Kv channels, KCNB/Kv2 family of Shab-type Kv channels, KCNC/Kv3 family of Shaw-type Kv channels, KCND/Kv4 family of Shal-type Kv channels, KCNF/Kv5 subfamily of Kv channels, KCNG/Kv6 subfamily of Kv channels, KCNV/Kv8 subfamily of Kv channels, and KCNS/Kv9 subfamily of Kv channels. Kv alpha subunits form functional homo- or hetero-tetrameric channels (typically with other alpha subunits from the same subfamily) through their BTB/POZ domain, also known as tetramerization (T1) domain, which is a versatile protein-protein interaction motif. KCNQ/Kv7 channels are not included in this family, since they do not contain a BTB/POZ domain.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  48 VTLLVDGTRFVVNPQIFTAHPDTMLGRM-------FGPGREYNFTRPnekgeyviaegisATVFRTVLDYYKTGIINCPD 120
Cdd:cd18317     1 VVLNVGGTRFELSRSTLLRFPDTRLGKLakeshayDESTNEYFFDRN-------------PEVFEAILDYYRTGELHLPS 67

                          90
                  ....*....|...
gi 1247174024 121 GISIPDLRDTCDY 133
Cdd:cd18317    68 NVCPASFKEELEF 80

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel tetramerization domain-containing protein KCTD11; KCTD11 may function as an antagonist of the Hedgehog pathway of cell proliferation and differentiation by affecting the nuclear transfer of transcription factor GLI1, thus maintaining cerebellar granule cells in the undifferentiated state. It is a probable substrate-specific adapter for a BCR (BTB-CUL3-RBX1) E3 ubiquitin-protein ligase complex towards HDAC1. It contains a BTB/POZ domain; in some cases the domain may be truncated. The BTB/POZ domain, also known as tetramerization (T1) domain, is a versatile protein-protein interaction motif that facilitates homodimerization or heterodimerization. KCTD family BTB domains can adopt a wide range of oligomerization geometries, including homodimerization, tetramerization, and pentamerization. Variants of the human/mouse KCTD11 appear to contain truncated BTB/POZ domains.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 1247174024  48 VTLLVDGTRFVVNPQIFTAHPDTMLGRMFGPG-REYNFTRPNEKGEYVIAEgiSATVFRTVLDYYKTGIINCPDGIS 123
Cdd:cd18370     1 VTLNVGGTLYSTTLETLTRFPDSMLGAMFRAGtPIPPNLNMQGGGHYFIDR--DGKAFRHILNFLRLGRLDLPRGYG 75

BTB/POZ domain; In voltage-gated K+ channels this domain is responsible for subfamily-specific assembly of alpha-subunits into functional tetrameric channels. In KCTD1 this domain functions as a transcriptional repressor. It also mediates homomultimerization of KCTD1 and interaction of KCTD1 with the transcription factor AP-2-alpha.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  48 VTLLVDGTRFVVNPQIFTAHPDTMLGRMFgpGREYNFTRPnEKGEYVIAEgiSATVFRTVLDYYKTGI-INCPDGISIPD 126
Cdd:pfam02214   1 VKLNVGGTRFETLKSTLTRFPDTRLGRLL--ELECDDYDD-DTNEYFFDR--SPKHFETILNFYRTGGkLHRPEEVCLDE 75

                  ....*..
gi 1247174024 127 LRDTCDY 133
Cdd:pfam02214  76 FLEEAEF 82

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel regulatory protein (KCNRG); KCNRG, also called potassium channel regulator or protein CLLD4, is an endoplasmic reticulum (ER)-associated tumor suppressor that regulates Kv1 family potassium channel proteins by retaining a fraction of the channels in endomembranes. It contains a BTB/POZ domain, also known as tetramerization (T1) domain, which is a versatile protein-protein interaction motif that facilitates homodimerization or heterodimerization.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1247174024  46 EKVTLLVDGTRFVVNPQIFTAHPDTMLGRMFgPGREYNFTRPNekGEYVIAEgiSATVFRTVLDYYKTGIINCPDGIS 123
Cdd:cd18375     1 ELVTLNVGGKKFTTRPSTLRRFPDSRLARML-DGKDQDFKVVN--GQFFVDR--DGSLFSYILDYLRTGQLTLPTEFS 73

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium voltage-gated channel subfamily D member 2 (KCND2); KCND2, also called voltage-gated potassium channel subunit Kv4.2, is a major pore-forming subunit in somatodendritic subthreshold A-type potassium current I(SA) channels. It mediates transmembrane potassium transport in excitable membranes, primarily in the brain. Voltage-gated potassium (Kv) channels are composed of alpha subunits, which form the actual conductance pore, and cytoplasmic beta subunits, which are auxiliary proteins that associate with alpha subunits to modulate the activity of the Kv channel. KCND2 is an alpha subunit that forms functional homo- or hetero-tetrameric channels (with other Kv4/KCND alpha subunits) through its BTB/POZ domain, also known as tetramerization (T1) domain, which is a versatile protein-protein interaction motif. It is modulated by cytoplasmic KChIPs/KCNIPs (Kv-channel interacting proteins), which are small calcium binding proteins with EF-hand-like domains.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1247174024  48 VTLLVDGTRFVVNPQIFTAHPDTMLGrmfgpGREYNFTRPNEKGEYVIAEgiSATVFRTVLDYYKTGIINCP 119
Cdd:cd18418     2 IVLNVSGTRFQTWRNTLERYPDTLLG-----SSERDFFYHEETQEYFFDR--DPDIFRHILNFYRTGKLHYP 66

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium voltage-gated channel subfamily V member 1 (KCNV1); KCNV1, also called neuronal potassium channel alpha subunit HNKA or voltage-gated potassium channel subunit Kv8.1, is a new neuronal voltage-gated potassium channel alpha subunit with specific inhibitory properties towards Shab and Shaw channels. It modulates KCNB1 (also known as Kv2.1) and KCNB2 (also known as Kv2.2) channel activity by shifting the threshold for inactivation to more negative values and by slowing the rate of inactivation. It can also down-regulate the channel activity of KCNB1, KCNB2, KCNC4 (also known as Kv3.4) and KCND1 (also known as Kv4.1), possibly by trapping them in intracellular membranes. Voltage-gated potassium (Kv) channels are composed of alpha subunits, which form the actual conductance pore, and cytoplasmic beta subunits, which are auxiliary proteins that associate with alpha subunits to modulate the activity of the Kv channel. KCNV1 is a regulatory alpha subunit that cannot form a functional homo-tetrameric channel. It forms hetero-tetrameric channels (with other functional alpha subunits) through its BTB/POZ domain, also known as tetramerization (T1) domain, which is a versatile protein-protein interaction motif.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  49 TLLVDGTRFVVNPQIFTAHPDTMLGRMFGPGR---------------EYNFTRpnekgeyviaegiSATVFRTVLDYYKT 113
Cdd:cd18424     2 TINVGGSRFVLSQQVLSSHPETRLGKLAVSVRdsvlelcddanfvdnEYFFDR-------------SSQAFKYIMNYYKT 68

                  .
gi 1247174024 114 G 114
Cdd:cd18424    69 G 69

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in potassium channel tetramerization domain-containing proteins, KCTD6, KCTD21 and similar proteins; KCTD6, also called KCASH3 (KCTD containing, Cullin3 adaptor, suppressor of Hedgehog 3), is a substrate-specific adaptor of cullin-3, effectively regulating protein levels of the muscle small ankyrin-1 isoform 5 (sAnk1.5). KCTD21, also called KCASH2, functions as a substrate-specific adaptor of cullin-3, promoting the ubiquitination and degradation of histone deacetylase HDAC1, thereby inhibiting the deacetylation-mediated transcriptional activation of the Hedgehog effectors Gli1 and Gli2. The BTB/POZ domain, also known as tetramerization (T1) domain, is a versatile protein-protein interaction motif that facilitates homodimerization or heterodimerization. KCTD family BTB domains can adopt a wide range of oligomerization geometries, including homodimerization, tetramerization, and pentamerization.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1247174024  48 VTLLVDGTRFVVNPQIFTAHPDTMLGRMFGpGReYNFTRpNEKGEYVIAEgiSATVFRTVLDYYKTGIINCPDGIS-IPD 126
Cdd:cd18365     3 VNLNVGGVHYTTTLATLTRFPDSMLGAMFS-GS-MPTTR-DDQGNYFIDR--DGTLFRYILNFLRSSQLSLPEDFKeYDL 77

                  ....*..
gi 1247174024 127 LRDTCDY 133
Cdd:cd18365    78 LLREADF 84

BTB (Broad-Complex, Tramtrack and Bric a brac)/POZ (poxvirus and zinc finger) domain found in KCND/Kv4 subfamily of Shal-type voltage-dependent potassium channels; Voltage-gated potassium (Kv) channels are composed of alpha subunits, which form the actual conductance pore, and cytoplasmic beta subunits, which are auxiliary proteins that associate with alpha subunits to modulate the activity of the Kv channel. The potassium voltage-gated channel subfamily Kv4, also known as subfamily D, contains three alpha subunit members, Kv4.1 (KCND1), Kv4.2 (KCND2), and Kv4.3 (KCND3), which are orthologs of the Shal gene in Drosophila. They are A-type potassium channels that mediate the native, fast inactivating (A-type) K+ current (IA) described both in the nervous system (A currents) and the heart (transient outward current). Kv4/KCND subfamily alpha subunits form functional homo- or hetero-tetrameric channels through their BTB/POZ domain, also known as tetramerization (T1) domain, which is a versatile protein-protein interaction motif. They are modulated by cytoplasmic KChIPs/KCNIPs (Kv-channel interacting proteins), which are small calcium binding proteins with EF-hand-like domains.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1247174024  47 KVTLLVDGTRFVVNPQIFTAHPDTMLGrmfGPGREYNFTrpNEKGEYVIAEgiSATVFRTVLDYYKTGIINCPDGISI 124
Cdd:cd18380     1 RIVINVSGRRFETWKNTLEKYPDTLLG---STEKEFFYD--DDTKEYFFDR--DPEIFRHILNFYRTGKLHYPRHECI 71

Ran-binding protein 2, Ran binding domains; RanBP2 (also called E3 SUMO-protein ligase RanBP2, 358 kDa nucleoporin, and nuclear pore complex (NPC) protein Nup358) is a giant nucleoporin that localizes to the cytosolic face of the NPC. RanBP2 contains a leucine-rich region, 8 zinc-finger motifs, a cyclophilin A homologous domain, and 4 RanBDs. Ran is a Ras-like nuclear small GTPase, which regulates receptor-mediated transport between the nucleus and the cytoplasm. RanGTP hydrolysis is stimulated by RanGAP together with the Ran-binding domain containing acessory proteins RanBP1 and RanBP2. These accessory proteins stabilize the active GTP-bound form of Ran. All eukaryotic cells contain RanBP1, but in vertebrates however, the main RanBP seems to be RanBP2. There is no RanBP2 ortholog in yeast. Transport complex disassembly is accomplished by a small ubiquitin-related modifier-1 (SUMO-1)-modified version of RanGAP that is bound to RanBP2. RanBP1 acts as a second line of defense against exported RanGTP-importin complexes which have escaped from dissociation by RanBP2. RanBP2 also interacts with the importin subunit beta-1. RabBD shares structural similarity to the PH domain, but lacks detectable sequence similarity. The members here include human, chicken, frog, tunicates, sea urchins, ticks, sea anemones, and sponges. RanBD repeats 1 and 3 are present in this hierarchy.

                          10        20        30        40
                  ....*....|....*....|....*....|....*....|..
gi 1247174024 209 GEEYSQILYS--SKLYRFfkyieNRDVAKtvLKERGLKNIRI 248
Cdd:cd13176     2 GEEDEEVLFShrAKLYRF-----DKDVKQ--WKERGVGDIKI 36