5L6J image
Entry Detail
PDB ID:
5L6J
Keywords:
Title:
Uba1 in complex with Ub-MLN7243 covalent adduct
Biological Source:
PDB Version:
Deposition Date:
2016-05-30
Release Date:
2017-06-14
Method Details:
Experimental Method:
Resolution:
2.68 Å
R-Value Free:
0.22
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 2 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Ubiquitin-activating enzyme E1 1
Chain IDs:A, C
Chain Length:1024
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Ubiquitin-40S ribosomal protein S31
Chain IDs:B, D
Chain Length:76
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Primary Citation
Dissecting the Specificity of Adenosyl Sulfamate Inhibitors Targeting the Ubiquitin-Activating Enzyme.
Structure 25 1120 1129.e3 (2017)
PMID: 28578874 DOI: 10.1016/j.str.2017.05.001

Abstact

Targeting the activating enzymes (E1) of ubiquitin (Ub) and ubiquitin-like modifiers (Ubls) has emerged as a promising anti-cancer strategy, possibly overcoming the ineffectiveness of proteasome inhibitors against solid tumors. Here, we report crystal structures of the yeast ubiquitin E1 (Uba1) with three adenosyl sulfamate inhibitors exhibiting different E1 specificities, which are all covalently linked to ubiquitin. The structures illustrate how the chemically diverse inhibitors are accommodated within the adenylation active site. When compared with the previously reported structures of various E1 enzymes, our structures provide the basis of the preferences of these inhibitors for different Ub/Ubl-activating enzymes. In vitro inhibition assays and molecular dynamics simulations validated the specificities of the inhibitors as deduced from the structures. Taken together, the structures establish a framework for the development of additional compounds targeting E1 enzymes, which will display higher potency and selectivity.

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