1u9a
From Proteopedia
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'''HUMAN UBIQUITIN-CONJUGATING ENZYME UBC9''' | '''HUMAN UBIQUITIN-CONJUGATING ENZYME UBC9''' | ||
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[[Category: Sixma, T K.]] | [[Category: Sixma, T K.]] | ||
[[Category: Tong, H.]] | [[Category: Tong, H.]] | ||
| - | [[Category: | + | [[Category: Cell cycle control]] |
| - | [[Category: | + | [[Category: Ligase]] |
| - | [[Category: | + | [[Category: Ubiquitin-conjugating enzyme]] |
| - | [[Category: | + | [[Category: Ubiquitin-directed proteolysis]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 10:55:31 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 07:55, 3 May 2008
HUMAN UBIQUITIN-CONJUGATING ENZYME UBC9
Overview
Murine/human ubiquitin-conjugating enzyme Ubc9 is a functional homolog of Saccharomyces cerevisiae Ubc9 that is essential for the viability of yeast cells with a specific role in the G2-M transition of the cell cycle. The structure of recombinant mammalian Ubc9 has been determined from two crystal forms at 2.0 A resolution. Like Arabidopsis thaliana Ubc1 and S. cerevisiae Ubc4, murine/human Ubc9 was crystallized as a monomer, suggesting that previously reported hetero- and homo-interactions among Ubcs may be relatively weak or indirect. Compared with the known crystal structures of Ubc1 and Ubc4, which regulate different cellular processes, Ubc9 has a 5-residue insertion that forms a very exposed tight beta-hairpin and a 2-residue insertion that forms a bulge in a loop close to the active site. Mammalian Ubc9 also possesses a distinct electrostatic potential distribution that may provide possible clues to its remarkable ability to interact with other proteins. The 2-residue insertion and other sequence and structural heterogeneity observed at the catalytic site suggest that different Ubcs may utilize catalytic mechanisms of varying efficiency and substrate specificity.
About this Structure
1U9A is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.
Reference
Crystal structure of murine/human Ubc9 provides insight into the variability of the ubiquitin-conjugating system., Tong H, Hateboer G, Perrakis A, Bernards R, Sixma TK, J Biol Chem. 1997 Aug 22;272(34):21381-7. PMID:9261152 Page seeded by OCA on Sat May 3 10:55:31 2008
