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Title: Mechanism of activating mutations and allosteric drug inhibition of the phosphatase SHP2

Journal Article · · Nature Communications
 [1]; ORCiD logo [2];  [1];  [1];  [1]; ORCiD logo [1];  [1]
  1. Brandeis Univ., Waltham, MA (United States). Howard Hughes Medical Institute, Department of Biochemistry
  2. Brandeis Univ., Waltham, MA (United States). Howard Hughes Medical Institute, Department of Biochemistry; Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA (United States). Dept. of Cancer Biology and Cell Biology

Protein tyrosine phosphatase SHP2 functions as a key regulator of cell cycle control, and activating mutations cause several cancers. Here, we dissect the energy landscape of wild-type SHP2 and the oncogenic mutation E76K. NMR spectroscopy and X-ray crystallography reveal that wild-type SHP2 exchanges between closed, inactive and open, active conformations. E76K mutation shifts this equilibrium toward the open state. The previously unknown open conformation is characterized, including the active-site WPD loop in the inward and outward conformations. Binding of the allosteric inhibitor SHP099 to E76K mutant, despite much weaker, results in an identical structure as the wild-type complex. A conformational selection to the closed state reduces drug affinity which, combined with E76K’s much higher activity, demands significantly greater SHP099 concentrations to restore wild-type activity levels. The differences in structural ensembles and drug-binding kinetics of cancer-associated SHP2 forms may stimulate innovative ideas for developing more potent inhibitors for activated SHP2 mutants.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1624118
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 60 works
Citation information provided by
Web of Science

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Cited By (5)

Minimally disruptive optical control of protein tyrosine phosphatase 1B journal February 2020
A Ce( iii ) complex potently inhibits the activity and expression of tyrosine phosphatase SHP-2 journal January 2019
Canine histiocytic sarcoma cell lines with SHP2 p.Glu76Gln or p.Glu76Ala mutations are sensitive to allosteric SHP2 inhibitor SHP099 journal August 2019
Molecular mechanism of SHP2 activation by PD-1 stimulation journal January 2020
Molecular mechanism of SHP2 activation by PD-1 stimulation other January 2020