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Title: Insights Into the Allosteric Inhibition of the SUMO E2 Enzyme Ubc9

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [1]; ORCiD logo [1]
  1. National Cancer Inst. (NCI), Frederick, MD (United States)
  2. National Cancer Inst. (NCI), Frederick, MD (United States); Leidos Biomedical Research, Inc., Frederick, MD (United States). Frederick National Lab. for Cancer Research
  3. Fudan Univ., Shanghai (China)
  4. Leidos Biomedical Research, Inc. Frederick, MD (United States); National Cancer Inst. (NCI), Frederick MD (United States)
  5. Leidos Biomedical Research, Inc. Frederick, MD (United States); National Cancer Inst. (NCI), Frederick MD (United States); Tel Aviv Univ. (Israel)

Conjugation of the small ubiquitin-like modifier (SUMO) to protein substrates is an important disease-associated posttranslational modification, although few inhibitors of this process are known. In this paper, we report the discovery of an allosteric small-molecule binding site on Ubc9, the sole SUMO E2 enzyme. An X-ray crystallographic screen was used to identify two distinct small-molecule fragments that bind to Ubc9 at a site distal to its catalytic cysteine. These fragments and related compounds inhibit SUMO conjugation in biochemical assays with potencies of 1.9–5.8 mm. Mechanistic and biophysical analyses, coupled with molecular dynamics simulations, point toward ligand-induced rigidification of Ubc9 as a mechanism of inhibition.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Institutes of Health (NIH); National Cancer Institute (NCI); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
HHSN261200800001E; W-31-109-Eng-38
OSTI ID:
1249263
Journal Information:
Angewandte Chemie (International Edition), Vol. 55, Issue 19; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

References (33)

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Cereblon is a direct protein target for immunomodulatory and antiproliferative activities of lenalidomide and pomalidomide journal May 2012
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An Electrophoretic Mobility Shift Assay Identifies a Mechanistically Unique Inhibitor of Protein Sumoylation journal April 2013
E2 enzyme inhibition by stabilization of a low-affinity interface with ubiquitin journal December 2013
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Ligand Binding and Circular Permutation Modify Residue Interaction Network in DHFR journal June 2007
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Fragment-based lead discovery grows up journal December 2012
Allosteric regulation of E2:E3 interactions promote a processive ubiquitination machine journal August 2013
The sumoylation pathway is dysregulated in multiple myeloma and is associated with adverse patient outcome journal April 2010
Covalent Inhibition of Ubc13 Affects Ubiquitin Signaling and Reveals Active Site Elements Important for Targeting journal May 2015
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Structure of the human Cereblon–DDB1–lenalidomide complex reveals basis for responsiveness to thalidomide analogs journal August 2014
Oncogenesis driven by the Ras/Raf pathway requires the SUMO E2 ligase Ubc9 journal March 2015
Novel Inhibitors of Rad6 Ubiquitin Conjugating Enzyme: Design, Synthesis, Identification, and Functional Characterization journal January 2013
Allosteric Activation of E2-RING Finger-Mediated Ubiquitylation by a Structurally Defined Specific E2-Binding Region of gp78 journal June 2009
Elevated Global SUMOylation in Ubc9 Transgenic Mice Protects Their Brains against Focal Cerebral Ischemic Damage journal October 2011
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An inhibitor of NEDD8-activating enzyme as a new approach to treat cancer journal April 2009
SUMO1 Deficiency Exacerbates Neurological and Cardiac Dysfunction after Intracerebral Hemorrhage in Aged Mice journal August 2020
Ligand Binding and Circular Permutation modify Residue Interaction Network in DHFR journal January 2005
Erratum: Cereblon is a direct protein target for immunomodulatory and antiproliferative activities of lenalidomide and pomalidomide journal November 2012

Cited By (2)

Allosteric mechanism for site-specific ubiquitination of FANCD2 journal December 2019
Expression of SUMO associated proteins in the mouse endometrium is regulated by ovarian hormones throughout the estrous cycle journal January 2020

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