K homology (KH) RNA-binding domain, type I; KH binds single-stranded RNA or DNA. It is found ...
2-39
3.28e-03
K homology (KH) RNA-binding domain, type I; KH binds single-stranded RNA or DNA. It is found in a wide variety of proteins including ribosomal proteins, transcription factors and post-transcriptional modifiers of mRNA. There are two different KH domains that belong to different protein folds, but they share a single KH motif. The KH motif is folded into a beta alpha alpha beta unit. In addition to the core, type II KH domains (e.g. ribosomal protein S3) include an N-terminal extension and type I KH domains (e.g. hnRNP K) contain a C-terminal extension. Some KH-I superfamily members contain a divergent KH domain that lacks the RNA-binding GXXG motif. Some others have a mutated GXXG motif which may or may not have nucleic acid binding ability.
The actual alignment was detected with superfamily member cd22407:
Pssm-ID: 469614 [Multi-domain] Cd Length: 62 Bit Score: 35.26 E-value: 3.28e-03
AKAP7 2'5' RNA ligase-like domain; AKAP7_NLS is the N-terminal domain of the cyclic ...
54-319
4.90e-59
AKAP7 2'5' RNA ligase-like domain; AKAP7_NLS is the N-terminal domain of the cyclic AMP-dependent protein kinase A, PKA, anchor protein AKAP7. This protein anchors PKA for its role in regulating PKA-mediated gene transcription in both somatic cells and oocytes. AKAP7_NLS carries the nuclear localization signal (NLS) KKRKK, that indicates the cellular destiny of this anchor protein. Binding to the regulatory subunits RI and RII of PKA is mediated via the family AKAP7_RIRII_bdg. at the C-terminus. This family represents a region that contains two 2'5' RNA ligase like domains pfam02834. Presumably this domain carried out some as yet unknown enzymatic function.
Pssm-ID: 402204 [Multi-domain] Cd Length: 207 Bit Score: 188.63 E-value: 4.90e-59
third type I K homology (KH) RNA-binding domain found in vigilin and similar proteins; Vigilin, ...
2-39
3.28e-03
third type I K homology (KH) RNA-binding domain found in vigilin and similar proteins; Vigilin, also called high density lipoprotein-binding protein, or HDL-binding protein, is a ubiquitous and highly conserved RNA-binding protein that shuttles between nucleus and cytoplasm presumably in contact with RNA molecules. It may be involved in chromosome partitioning at mitosis, facilitating translation and tRNA transport, and control of mRNA metabolism, including estrogen-mediated stabilization of vitellogenin mRNA. Vigilin is up-regulated by cholesterol loading of cells and functions to protect cells from over-accumulation of cholesterol. It may play a role in cell sterol metabolism. Disruption of human vigilin impairs chromosome condensation and segregation. Vigilin has a unique structure of 14-15 consecutively arranged, but non-identical K-homology (KH) domains which apparently mediate RNA-protein binding. The model corresponds to the third one.
Pssm-ID: 411835 [Multi-domain] Cd Length: 62 Bit Score: 35.26 E-value: 3.28e-03
AKAP7 2'5' RNA ligase-like domain; AKAP7_NLS is the N-terminal domain of the cyclic ...
54-319
4.90e-59
AKAP7 2'5' RNA ligase-like domain; AKAP7_NLS is the N-terminal domain of the cyclic AMP-dependent protein kinase A, PKA, anchor protein AKAP7. This protein anchors PKA for its role in regulating PKA-mediated gene transcription in both somatic cells and oocytes. AKAP7_NLS carries the nuclear localization signal (NLS) KKRKK, that indicates the cellular destiny of this anchor protein. Binding to the regulatory subunits RI and RII of PKA is mediated via the family AKAP7_RIRII_bdg. at the C-terminus. This family represents a region that contains two 2'5' RNA ligase like domains pfam02834. Presumably this domain carried out some as yet unknown enzymatic function.
Pssm-ID: 402204 [Multi-domain] Cd Length: 207 Bit Score: 188.63 E-value: 4.90e-59
third type I K homology (KH) RNA-binding domain found in vigilin and similar proteins; Vigilin, ...
2-39
3.28e-03
third type I K homology (KH) RNA-binding domain found in vigilin and similar proteins; Vigilin, also called high density lipoprotein-binding protein, or HDL-binding protein, is a ubiquitous and highly conserved RNA-binding protein that shuttles between nucleus and cytoplasm presumably in contact with RNA molecules. It may be involved in chromosome partitioning at mitosis, facilitating translation and tRNA transport, and control of mRNA metabolism, including estrogen-mediated stabilization of vitellogenin mRNA. Vigilin is up-regulated by cholesterol loading of cells and functions to protect cells from over-accumulation of cholesterol. It may play a role in cell sterol metabolism. Disruption of human vigilin impairs chromosome condensation and segregation. Vigilin has a unique structure of 14-15 consecutively arranged, but non-identical K-homology (KH) domains which apparently mediate RNA-protein binding. The model corresponds to the third one.
Pssm-ID: 411835 [Multi-domain] Cd Length: 62 Bit Score: 35.26 E-value: 3.28e-03
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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