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1ayz

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{{STRUCTURE_1ayz| PDB=1ayz | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE SACCHAROMYCES CEREVISIAE UBIQUITIN-CONJUGATING ENZYME RAD6 (UBC2) AT 2.6A RESOLUTION'''
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===CRYSTAL STRUCTURE OF THE SACCHAROMYCES CEREVISIAE UBIQUITIN-CONJUGATING ENZYME RAD6 (UBC2) AT 2.6A RESOLUTION===
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==Overview==
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The Saccharomyces cerevisiae ubiquitin-conjugating enzyme (UBC) Rad6 is required for several functions, including the repair of UV damaged DNA, damage-induced mutagenesis, sporulation, and the degradation of cellular proteins that possess destabilizing N-terminal residues. Rad6 mediates its role in N-end rule-dependent protein degradation via interaction with the ubiquitin-protein ligase Ubr1 and in DNA repair via interactions with the DNA binding protein Rad18. We report here the crystal structure of Rad6 refined at 2.6 A resolution to an R factor of 21.3%. The protein adopts an alpha/beta fold that is very similar to other UBC structures. An apparent difference at the functionally important first helix, however, has prompted a reassessment of previously reported structures. The active site cysteine lies in a cleft formed by a coil region that includes the 310 helix and a loop that is in different conformations for the three molecules in the asymmetric unit. Residues important for Rad6 interaction with Ubr1 and Rad18 are on the opposite side of the structure from the active site, indicating that this part of the UBC surface participates in protein-protein interactions that define Rad6 substrate specificity.
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{{ABSTRACT_PUBMED_9497353}}
==About this Structure==
==About this Structure==
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[[Category: Ubiquitin conjugation]]
[[Category: Ubiquitin conjugation]]
[[Category: Ubiquitin-conjugating enzyme]]
[[Category: Ubiquitin-conjugating enzyme]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 17:53:21 2008''

Revision as of 14:53, 30 June 2008

Image:1ayz.png

Template:STRUCTURE 1ayz

CRYSTAL STRUCTURE OF THE SACCHAROMYCES CEREVISIAE UBIQUITIN-CONJUGATING ENZYME RAD6 (UBC2) AT 2.6A RESOLUTION

Template:ABSTRACT PUBMED 9497353

About this Structure

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

Reference

Crystal structure of the Saccharomyces cerevisiae ubiquitin-conjugating enzyme Rad6 at 2.6 A resolution., Worthylake DK, Prakash S, Prakash L, Hill CP, J Biol Chem. 1998 Mar 13;273(11):6271-6. PMID:9497353

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