3OLM image
Entry Detail
PDB ID:
3OLM
Keywords:
LIGASE
Title:
Structure and Function of a Ubiquitin Binding Site within the Catalytic Domain of a HECT Ubiquitin Ligase
Biological Source:
Source Organism:
Saccharomyces cerevisiae
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2010-08-26
Release Date:
2011-03-23
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.27
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
C 1 2 1
3OLM validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:E3 ubiquitin-protein ligase RSP5
Chain IDs:A
Chain Length:429
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P39940 Pfam ID:PF00397, PF00632
Protein Blast
Polymer Type:polypeptide(L)
Description:Ubiquitin
Chain IDs:B (auth: D)
Chain Length:79
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P0CG63 Pfam ID:PF00240
Primary Citation
Structure and function of a HECT domain ubiquitin-binding site.
Embo Rep. 12 334 341 (2011)
PMID: 21399621 DOI: 10.1038/embor.2011.23

Abstact

The Rsp5 ubiquitin ligase contains a non-covalent binding site for ubiquitin within the amino-terminal lobe (N-lobe) of the HECT domain, and the X-ray crystal structure of the HECT-ubiquitin complex has been determined. Hydrophobic patch residues of ubiquitin (L8, I44, V70) were crucial for interaction with Rsp5, and amino-acid alterations at the Rsp5-binding interface resulted in defects in polyubiquitination. Our results support a model in which the N-lobe-binding site acts to localize and orient the distal end of the ubiquitin chain to promote conjugation of the next ubiquitin molecule.

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Primary Citation of related structures
3OLM