2. Academic Validation
  3. Structural and Functional Analyses of an Allosteric EYA2 Phosphatase Inhibitor That Has On-Target Effects in Human Lung Cancer Cells

Structural and Functional Analyses of an Allosteric EYA2 Phosphatase Inhibitor That Has On-Target Effects in Human Lung Cancer Cells

  • Mol Cancer Ther. 2019 Sep;18(9):1484-1496. doi: 10.1158/1535-7163.MCT-18-1239.
Jothi Anantharajan  # 1,  Hengbo Zhou  # 2,  Lingdi Zhang  # 3,  Taylor Hotz 2,  Melanie Y Vincent 2,  Melanie A Blevins 3,  Anna E Jansson 1,  John Wee Liang Kuan 1,  Elizabeth Yihui Ng 1,  Yee Khoon Yeo 1,  Nithya Baburajendran 1,  Grace Lin 1,  Alvin W Hung 1,  Joma Joy 1,  Samarjit Patnaik 4,  Juan Marugan 4,  Pratyaydipta Rudra 5,  Debashis Ghosh 5,  Jeffrey Hill 6,  Thomas H Keller 6,  Rui Zhao 7,  Heide L Ford 8 3,  CongBao Kang 6
Affiliations

Affiliations

  • 1 Experimental Drug Discovery Centre, A*STAR, Singapore, Singapore.
  • 2 Department of Pharmacology, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado.
  • 3 Department of Biochemistry and Molecular Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado.
  • 4 National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, Maryland.
  • 5 Department of Biostatistics and Informatics, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
  • 6 Experimental Drug Discovery Centre, A*STAR, Singapore, Singapore. heide.ford@cuanschutz.edu jhill@eddc.a-star.edu.sg thkeller@eddc.a-star.edu.sg rui.zhao@cuanschutz.edu cbkang@eddc.a-star.edu.sg.
  • 7 Department of Biochemistry and Molecular Genetics, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado. heide.ford@cuanschutz.edu jhill@eddc.a-star.edu.sg thkeller@eddc.a-star.edu.sg rui.zhao@cuanschutz.edu cbkang@eddc.a-star.edu.sg.
  • 8 Department of Pharmacology, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado. heide.ford@cuanschutz.edu jhill@eddc.a-star.edu.sg thkeller@eddc.a-star.edu.sg rui.zhao@cuanschutz.edu cbkang@eddc.a-star.edu.sg.
  • # Contributed equally.
PMID: 31285279 DOI: 10.1158/1535-7163.MCT-18-1239
Abstract

EYA proteins (EYA1-4) are critical developmental transcriptional cofactors that contain an EYA domain (ED) harboring Tyr Phosphatase activity. EYA proteins are largely downregulated after embryogenesis but are reexpressed in cancers, and their Tyr Phosphatase activity plays an important role in the DNA damage response and tumor progression. We previously identified a class of small-molecule allosteric inhibitors that specifically inhibit the Tyr Phosphatase activity of EYA2. Herein, we determined the crystal structure of the EYA2 ED in complex with NCGC00249987 (a representative compound in this class), revealing that it binds to an induced pocket distant from the active site. NCGC00249987 binding leads to a conformational change of the active site that is unfavorable for Mg2+ binding, thereby inhibiting EYA2's Tyr Phosphatase activity. We demonstrate, using genetic mutations, that migration, invadopodia formation, and invasion of lung adenocarcinoma cells are dependent on EYA2 Tyr Phosphatase activity, whereas growth and survival are not. Further, we demonstrate that NCGC00249987 specifically targets migration, invadopodia formation, and invasion of lung Cancer cells, but that it does not inhibit cell growth or survival. The compound has no effect on lung Cancer cells carrying an EYA2 F290Y mutant that abolishes compound binding, indicating that NCGC00249987 is on target in lung Cancer cells. These data suggest that the NCGC00249987 allosteric inhibitor can be used as a chemical probe to study the function of the EYA2 Tyr Phosphatase activity in cells and may have the potential to be developed into an antimetastatic agent for cancers reliant on EYA2's Tyr Phosphatase activity.

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