1n87: Difference between revisions

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[[Image:1n87.gif|left|200px]]
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{{STRUCTURE_1n87|  PDB=1n87  |  SCENE=  }}  
{{STRUCTURE_1n87|  PDB=1n87  |  SCENE=  }}  


'''Solution structure of the U-box of Prp19'''
===Solution structure of the U-box of Prp19===




==Overview==
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The structure of the U-box in the essential Saccharomyces cerevisiae pre-mRNA splicing factor Prp19p has been determined by NMR. The conserved zinc-binding sites supporting the cross-brace arrangement in RING-finger domains are replaced by hydrogen-bonding networks in the U-box. These hydrogen-bonding networks are necessary for the structural stabilization and activity of the U-box. A conservative Val--&gt;Ile point mutation in the Prp19p U-box domain leads to pre-mRNA splicing defects in vivo. NMR analysis of this mutant shows that the substitution disrupts structural integrity of the U-box domain. Furthermore, comparison of the Prp19p U-box domain with known RING-E2 complex structures demonstrates that both U-box and RING-fingers contain a conserved interaction surface. Mutagenesis of residues at this interface, while not perturbing the structure of the U-box, abrogates Prp19p function in vivo. These comparative structural and functional analyses imply that the U-box and its associated ubiquitin ligase activity are critical for Prp19p function in vivo.
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{{ABSTRACT_PUBMED_12627222}}


==About this Structure==
==About this Structure==
1N87 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N87 OCA].  
1N87 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N87 OCA].  


==Reference==
==Reference==
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[[Category: U-box]]
[[Category: U-box]]
[[Category: Ubiquitin ligase]]
[[Category: Ubiquitin ligase]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 02:13:01 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 22:39:00 2008''

Revision as of 22:39, 28 July 2008

File:1n87.png

Template:STRUCTURE 1n87

Solution structure of the U-box of Prp19Solution structure of the U-box of Prp19

Template:ABSTRACT PUBMED 12627222

About this StructureAbout this Structure

1N87 is a Single protein structure of sequence from Saccharomyces cerevisiae. Full experimental information is available from OCA.

ReferenceReference

Structural insights into the U-box, a domain associated with multi-ubiquitination., Ohi MD, Vander Kooi CW, Rosenberg JA, Chazin WJ, Gould KL, Nat Struct Biol. 2003 Apr;10(4):250-5. PMID:12627222

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