TAF1A

TATA box-binding protein-associated factor RNA polymerase I subunit A is an enzyme that in humans is encoded by the TAF1A gene.[4][5]

TAF1A
Identifiers
Aliases	TAF1A, MGC:17061, RAFI48, SL1, TAFI48, TATA-box binding protein associated factor, RNA polymerase I subunit A
External IDs	OMIM: 604903 MGI: 109578 HomoloGene: 4155 GeneCards: TAF1A
Gene location (Human) Chr. Chromosome 1 (human)[1] Band 1q41 Start 222,557,902 bp[1] End 222,589,933 bp[1]
RNA expression pattern More reference expression data
Gene ontology Molecular function • DNA binding • GO:0001948 protein binding Cellular component • microtubule cytoskeleton • RNA polymerase I transcription factor complex • cell nucleus • nucleoplasm Biological process • transcription initiation from RNA polymerase I promoter • transcription from RNA polymerase I promoter • termination of RNA polymerase I transcription • positive regulation of gene expression, epigenetic • transcription from RNA polymerase II promoter • regulation of transcription, DNA-templated • transcription, DNA-templated • transcription elongation from RNA polymerase I promoter Sources:Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	9015	21339
Ensembl	ENSG00000143498	n/a
UniProt	Q15573 Q5JRA7	P97357
RefSeq (mRNA)	NM_001201536 NM_005681 NM_139352	NM_001277957 NM_001277958 NM_001277959 NM_021466
RefSeq (protein)	NP_001188465 NP_005672 NP_647603	NP_001264886 NP_001264887 NP_001264888 NP_067441
Location (UCSC)	Chr 1: 222.56 – 222.59 Mb	n/a
PubMed search	[2]	[3]
Wikidata
View/Edit Human View/Edit Mouse

Function

Initiation of transcription by RNA polymerase I requires the formation of a complex composed of the TATA-binding protein (TBP) and three TBP-associated factors (TAFs) specific for RNA polymerase I. This complex, known as selective factor 1 (SL1), binds to the core promoter of ribosomal RNA genes to position the polymerase properly and acts as a channel for regulatory signals. This gene encodes the smallest SL1-specific TAF. Two transcripts encoding different isoforms have been identified.[5]

Interactions

TAF1A has been shown to interact with Acidic leucine-rich nuclear phosphoprotein 32 family member A[6] and Protein SET.[6]

References

1. GRCh38: Ensembl release 89: ENSG00000143498 - Ensembl, May 2017
2. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
3. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. Comai L, Zomerdijk JC, Beckmann H, Zhou S, Admon A, Tjian R (December 1994). "Reconstitution of transcription factor SL1: exclusive binding of TBP by SL1 or TFIID subunits". Science. 266 (5193): 1966–72. doi:10.1126/science.7801123. PMID 7801123.
5. "Entrez Gene: TAF1A TATA box binding protein (TBP)-associated factor, RNA polymerase I, A, 48kDa".
6. Seo SB, McNamara P, Heo S, Turner A, Lane WS, Chakravarti D (January 2001). "Regulation of histone acetylation and transcription by INHAT, a human cellular complex containing the set oncoprotein". Cell. 104 (1): 119–30. doi:10.1016/S0092-8674(01)00196-9. PMID 11163245.

Further reading

• Rudloff U, Eberhard D, Tora L, Stunnenberg H, Grummt I (1994). "TBP-associated factors interact with DNA and govern species specificity of RNA polymerase I transcription". EMBO J. 13 (11): 2611–6. PMC 395135. PMID 8013460.
• Di Pietro C, Rapisarda A, Amico V, Bonaiuto C, Viola A, Scalia M, Motta S, Amato A, Engel H, Messina A, Sichel G, Grzeschik K, Purrello M (2000). "Genomic localization of the human genes TAF1A, TAF1B and TAF1C, encoding TAF(I)48, TAF(I)63 and TAF(I)110 subunits of class I general transcription initiation factor SL1". Cytogenet. Cell Genet. 89 (1–2): 133–6. doi:10.1159/000015592. PMID 10894955.
• Zhai W, Comai L (2000). "Repression of RNA polymerase I transcription by the tumor suppressor p53". Mol. Cell. Biol. 20 (16): 5930–8. doi:10.1128/MCB.20.16.5930-5938.2000. PMC 86070. PMID 10913176.
• Seo SB, McNamara P, Heo S, Turner A, Lane WS, Chakravarti D (2001). "Regulation of histone acetylation and transcription by INHAT, a human cellular complex containing the set oncoprotein". Cell. 104 (1): 119–30. doi:10.1016/S0092-8674(01)00196-9. PMID 11163245.
• Miller G, Panov KI, Friedrich JK, Trinkle-Mulcahy L, Lamond AI, Zomerdijk JC (2001). "hRRN3 is essential in the SL1-mediated recruitment of RNA Polymerase I to rRNA gene promoters". EMBO J. 20 (6): 1373–82. doi:10.1093/emboj/20.6.1373. PMC 145519. PMID 11250903.
• Dynes JL, Xu S, Bothner S, Lahti JM, Hori RT (2004). "The carboxyl-terminus directs TAF(I)48 to the nucleus and nucleolus and associates with multiple nuclear import receptors". J. Biochem. 135 (3): 429–38. doi:10.1093/jb/mvh051. PMID 15113842.
• Yamamoto K, Yamamoto M, Hanada K, Nogi Y, Matsuyama T, Muramatsu M (2004). "Multiple protein-protein interactions by RNA polymerase I-associated factor PAF49 and role of PAF49 in rRNA transcription". Mol. Cell. Biol. 24 (14): 6338–49. doi:10.1128/MCB.24.14.6338-6349.2004. PMC 434256. PMID 15226435.
• Grandori C, Gomez-Roman N, Felton-Edkins ZA, Ngouenet C, Galloway DA, Eisenman RN, White RJ (2005). "c-Myc binds to human ribosomal DNA and stimulates transcription of rRNA genes by RNA polymerase I". Nat. Cell Biol. 7 (3): 311–8. doi:10.1038/ncb1224. PMID 15723054.
• Rual JF, Venkatesan K, Hao T, Hirozane-Kishikawa T, Dricot A, Li N, Berriz GF, Gibbons FD, Dreze M, Ayivi-Guedehoussou N, Klitgord N, Simon C, Boxem M, Milstein S, Rosenberg J, Goldberg DS, Zhang LV, Wong SL, Franklin G, Li S, Albala JS, Lim J, Fraughton C, Llamosas E, Cevik S, Bex C, Lamesch P, Sikorski RS, Vandenhaute J, Zoghbi HY, Smolyar A, Bosak S, Sequerra R, Doucette-Stamm L, Cusick ME, Hill DE, Roth FP, Vidal M (2005). "Towards a proteome-scale map of the human protein-protein interaction network". Nature. 437 (7062): 1173–8. doi:10.1038/nature04209. PMID 16189514.