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Mechanism of allosteric inhibition of human p97/VCP ATPase and its disease mutant by triazole inhibitors

Journal Article · · Communications Chemistry
 [1];  [2];  [3];  [3];  [4];  [5];  [4];  [4];  [6];  [7];  [6];  [8];  [3];  [2];  [2];  [9];  [6];  [10];  [3];  [2]
  1. Arizona State Univ., Tempe, AZ (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
  2. Arizona State Univ., Tempe, AZ (United States)
  3. California Institute of Technology (CalTech), Pasadena, CA (United States)
  4. Univ. of Pittsburgh, PA (United States)
  5. Univ. of Pittsburgh, PA (United States); Phenikaa University (Vietnam)
  6. Curia Global, Albany, NY (United States)
  7. Curia Global, Albany, NY (United States); Boston Univ., MA (United States)
  8. California Institute of Technology (CalTech), Pasadena, CA (United States); National Institutes of Health (NIH), Bethesda, MD (United States)
  9. Leidos Biomedical Research, Inc., Frederick, MD (United States)
  10. Univ. of Pennsylvania, Philadelphia, PA (United States); Univ. of Pittsburgh, PA (United States)
Human p97 ATPase is crucial in various cellular processes, making it a target for inhibitors to treat cancers, neurological, and infectious diseases. Triazole allosteric p97 inhibitors have been demonstrated to match the efficacy of CB-5083, an ATP-competitive inhibitor, in cellular models. However, the mechanism is not well understood. This study systematically investigates the structures of new triazole inhibitors bound to  both wild-type and disease mutant forms of p97 and measures their effects on function. These inhibitors bind at the interface of the D1 and D2 domains of each p97 subunit, shifting surrounding helices and altering the loop structures near the C-terminal α2 G helix to modulate domain-domain communications. A key structural moiety of the inhibitor affects the rotameric conformations of interacting side chains, indirectly modulating the N-terminal domain conformation in p97 R155H mutant. The differential effects of inhibitor binding to wild-type and mutant p97 provide insights into drug design with enhanced specificity, particularly for oncology applications.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012704
OSTI ID:
2470289
Journal Information:
Communications Chemistry, Journal Name: Communications Chemistry Journal Issue: 1 Vol. 7; ISSN 2399-3669
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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