1k1g: Difference between revisions

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{{STRUCTURE_1k1g|  PDB=1k1g  |  SCENE=  }}  
{{STRUCTURE_1k1g|  PDB=1k1g  |  SCENE=  }}  


'''STRUCTURAL BASIS FOR RECOGNITION OF THE INTRON BRANCH SITE RNA BY SPLICING FACTOR 1'''
===STRUCTURAL BASIS FOR RECOGNITION OF THE INTRON BRANCH SITE RNA BY SPLICING FACTOR 1===




==Overview==
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During spliceosome assembly, splicing factor 1 (SF1) specifically recognizes the intron branch point sequence (BPS) UACUAAC in the pre-mRNA transcripts. We show that the KH-QUA2 region of SF1 defines an enlarged KH (hn RNP K) fold which is necessary and sufficient for BPS binding. The 3' part of the BPS (UAAC), including the conserved branch point adenosine (underlined), is specifically recognized in a hydrophobic cleft formed by the Gly-Pro-Arg-Gly motif and the variable loop of the KH domain. The QUA2 region recognizes the 5' nucleotides of the BPS (ACU). The branch point adenosine acting as the nucleophile in the first biochemical step of splicing is deeply buried. BPS RNA recognition suggests how SF1 may facilitate subsequent formation of the prespliceosomal complex A.
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==About this Structure==
==About this Structure==
1K1G is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K1G OCA].  
1K1G is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K1G OCA].  


==Reference==
==Reference==
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[[Category: Splicing]]
[[Category: Splicing]]
[[Category: Star protein]]
[[Category: Star protein]]
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Revision as of 21:17, 1 July 2008

File:1k1g.png

Template:STRUCTURE 1k1g

STRUCTURAL BASIS FOR RECOGNITION OF THE INTRON BRANCH SITE RNA BY SPLICING FACTOR 1STRUCTURAL BASIS FOR RECOGNITION OF THE INTRON BRANCH SITE RNA BY SPLICING FACTOR 1

Template:ABSTRACT PUBMED 11691992

About this StructureAbout this Structure

1K1G is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

ReferenceReference

Structural basis for recognition of the intron branch site RNA by splicing factor 1., Liu Z, Luyten I, Bottomley MJ, Messias AC, Houngninou-Molango S, Sprangers R, Zanier K, Kramer A, Sattler M, Science. 2001 Nov 2;294(5544):1098-102. PMID:11691992

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