2k2u

From Proteopedia

(Difference between revisions)

Revision as of 03:28, 25 December 2014

NMR Structure of the complex between Tfb1 subunit of TFIIH and the activation domain of VP16

Structural highlights

2k2u is a 2 chain structure with sequence from Human herpesvirus 1 and Saccharomyces cerevisiae. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	TFB1, YDR311W, D9740.3 (Saccharomyces cerevisiae), UL48 (Human herpesvirus 1)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[TFB1_YEAST] Acts as component of the general transcription and DNA repair factor IIH (TFIIH) core, which is essential for both basal and activated transcription, and is involved in nucleotide excision repair (NER) of damaged DNA. TFIIH has CTD kinase and DNA-dependent ATPase activity, and is essential for polymerase II transcription in vitro.^[1] ^[2] [ATIN_HHV1F] Transcriptional activator of immediate-early (IE) gene products (alpha genes). Acts as a key activator of lytic infection by initiating the lytic program through the assembly of the transcriptional regulatory VP16-induced complex composed of VP16 and two cellular factors, HCFC1 and POU2F 1. VP16-induced complex represents a regulatory switch: when it is on, it promotes IE-gene expression and thus lytic infection, and when it is off, it limits IE-gene transcription favoring latent infection (By similarity).^[3] May play a role in the aggregation of tegument proteins around nucleocapsids during virus morphogenesis (Potential).^[4]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The Herpes Simplex Virion Protein 16 (VP16) activates transcription through a series of protein/protein interactions involving its highly acidic transactivation domain (TAD). The acidic TAD of VP16 (VP16TAD) has been shown to interact with several partner proteins both in vitro and in vivo, and many of these VP16 partners also bind the acidic TAD of the mammalian tumor suppressor protein p53. For example, the TADs of VP16 and p53 (p53TAD) both interact directly with the p62/Tfb1 (human/yeast) subunit of TFIIH, and this interaction correlates with their ability to activate both the initiation and elongation phase of transcription. In this manuscript, we use NMR spectroscopy, isothermal titration calorimetery (ITC) and site-directed mutagenesis studies to characterize the interaction between the VP16TAD and Tfb1. We identify a region within the carboxyl-terminal subdomain of the VP16TAD (VP16C) that has sequence similarity with p53TAD2 and binds Tfb1 with nanomolar affinity. We determine an NMR structure of a Tfb1/VP16C complex, which represents the first high-resolution structure of the VP16TAD in complex with a target protein. The structure demonstrates that like p53TAD2, VP16C forms a 9-residue alpha-helix in complex with Tfb1. Comparison of the VP16/Tfb1and p53/Tfb1 structures clearly demonstrates how the viral activator VP16C and p53TAD2 shares numerous aspects of binding to Tfb1. Despite the similarities, important differences are observed between the p53TAD2/Tfb1 and VP16C/Tfb1 complexes, and these differences demonstrate how selected activators such as p53 depend on phosphorylation events to selectively regulate transcription.

NMR structure of the complex between the Tfb1 subunit of TFIIH and the activation domain of VP16: structural similarities between VP16 and p53.,Langlois C, Mas C, Di Lello P, Jenkins LM, Legault P, Omichinski JG J Am Chem Soc. 2008 Aug 13;130(32):10596-604. Epub 2008 Jul 17. PMID:18630911^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Svejstrup JQ, Feaver WJ, LaPointe J, Kornberg RD. RNA polymerase transcription factor IIH holoenzyme from yeast. J Biol Chem. 1994 Nov 11;269(45):28044-8. PMID:7961739
↑ Sung P, Guzder SN, Prakash L, Prakash S. Reconstitution of TFIIH and requirement of its DNA helicase subunits, Rad3 and Rad25, in the incision step of nucleotide excision repair. J Biol Chem. 1996 May 3;271(18):10821-6. PMID:8631896
↑ Narayanan A, Nogueira ML, Ruyechan WT, Kristie TM. Combinatorial transcription of herpes simplex virus and varicella zoster virus immediate early genes is strictly determined by the cellular coactivator HCF-1. J Biol Chem. 2005 Jan 14;280(2):1369-75. Epub 2004 Nov 1. PMID:15522876 doi:http://dx.doi.org/10.1074/jbc.M410178200
↑ Narayanan A, Nogueira ML, Ruyechan WT, Kristie TM. Combinatorial transcription of herpes simplex virus and varicella zoster virus immediate early genes is strictly determined by the cellular coactivator HCF-1. J Biol Chem. 2005 Jan 14;280(2):1369-75. Epub 2004 Nov 1. PMID:15522876 doi:http://dx.doi.org/10.1074/jbc.M410178200
↑ Langlois C, Mas C, Di Lello P, Jenkins LM, Legault P, Omichinski JG. NMR structure of the complex between the Tfb1 subunit of TFIIH and the activation domain of VP16: structural similarities between VP16 and p53. J Am Chem Soc. 2008 Aug 13;130(32):10596-604. Epub 2008 Jul 17. PMID:18630911 doi:10.1021/ja800975h

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2k2u"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2k2u]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human_herpesvirus_1 Human herpesvirus 1] and [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2K2U OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2K2U FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TFB1, YDR311W, D9740.3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]), UL48 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10298 Human herpesvirus 1])</td></tr>
+</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TFB1, YDR311W, D9740.3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]), UL48 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10298 Human herpesvirus 1])</td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2k2u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2k2u OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2k2u RCSB], [http://www.ebi.ac.uk/pdbsum/2k2u PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2k2u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2k2u OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2k2u RCSB], [http://www.ebi.ac.uk/pdbsum/2k2u PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/TFB1_YEAST TFB1_YEAST]] Acts as component of the general transcription and DNA repair factor IIH (TFIIH) core, which is essential for both basal and activated transcription, and is involved in nucleotide excision repair (NER) of damaged DNA. TFIIH has CTD kinase and DNA-dependent ATPase activity, and is essential for polymerase II transcription in vitro.<ref>PMID:7961739</ref> <ref>PMID:8631896</ref>  [[http://www.uniprot.org/uniprot/ATIN_HHV1F ATIN_HHV1F]] Transcriptional activator of immediate-early (IE) gene products (alpha genes). Acts as a key activator of lytic infection by initiating the lytic program through the assembly of the transcriptional regulatory VP16-induced complex composed of VP16 and two cellular factors, HCFC1 and POU2F 1. VP16-induced complex represents a regulatory switch: when it is on, it promotes IE-gene expression and thus lytic infection, and when it is off, it limits IE-gene transcription favoring latent infection (By similarity).<ref>PMID:15522876</ref>   May play a role in the aggregation of tegument proteins around nucleocapsids during virus morphogenesis (Potential).<ref>PMID:15522876</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 30: / Line 32: @@
 [[Category: Human herpesvirus 1]]
 [[Category: Saccharomyces cerevisiae]]
-[[Category: Jenkins, P M.Miller.]]
+[[Category: Jenkins, P M.Miller]]
-[[Category: Langlois, C.]]
+[[Category: Langlois, C]]
-[[Category: Legault, J.]]
+[[Category: Legault, J]]
-[[Category: Lello, P Di.]]
+[[Category: Lello, P Di]]
-[[Category: Mas, C.]]
+[[Category: Mas, C]]
-[[Category: Omichinski, J G.]]
+[[Category: Omichinski, J G]]
 [[Category: Activation]]
 [[Category: Dna damage]]

2k2u

From Proteopedia

Revision as of 03:28, 25 December 2014

NMR Structure of the complex between Tfb1 subunit of TFIIH and the activation domain of VP16

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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