Summary: snRNA-activating protein complex subunit 19, SNAPc subunit 19
snRNA-activating protein complex subunit 19, SNAPc subunit 19 Provide feedback
SNAPc19 is a family of proteins found in eukaryotes. It is one of the five core components of the snRNA-activating protein complex or SNAPc that helps direct the nucleation of RNA polymerases II and III. The core RNA polymerase II snRNA promoters consist of a single essential element, the proximal sequence element (PSE), whereas the core RNA polymerase III snRNA promoters consist of both a PSE and a TATA box. The SNAPc binds to the PSE of both of these. SNAPc recognises the PSE sequence common to all human snRNA genes, irrespective of polymerase specificity. SNAPc is also known as the PSE transcription factor (PTF) or PSE-binding protein (PBP). The human SNAP19 and SNAP45 subunits are dispensable for transcription in vitro and are not as widely conserved as the other three, SNAP190, SNAP43 and SNAP50, suggesting that these vertebrate-specific SNAPc subunits may have adapted specialised regulatory roles for snRNA gene transcription .
Henry RW, Mittal V, Ma B, Kobayashi R, Hernandez N;, Genes Dev. 1998;12:2664-2672.: SNAP19 mediates the assembly of a functional core promoter complex (SNAPc) shared by RNA polymerases II and III. PUBMED:9732265 EPMC:9732265
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This family is new in this Pfam release.
|Author:||Eberhardt RY, Coggill P, Hetherington K|
|Number in seed:||22|
|Number in full:||69|
|Average length of the domain:||82.80 aa|
|Average identity of full alignment:||46 %|
|Average coverage of the sequence by the domain:||84.02 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||1|
|Download:||download the raw HMM for this family|
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