Cooperative interactions between VEGFR2 extracellular Ig-like subdomains ensure VEGFR2 dimerization

Christopher King, Daniel Wirth, Samuel Workman, Kalina A Hristova

Research output: Contribution to journalArticle

Abstract

Background Prior studies have suggested that the interactions occurring between VEGFR2 extracellular domains in the absence of ligand are complex. Here we seek novel insights into these interactions, and into the role of the different Ig-like domains (D1 through D7) in VEGFR2 dimerization. Methods We study the dimerization of a single amino acid mutant and of three deletion mutants in the plasma membrane using two photon microscopy and fully quantified spectral imaging. Results We demonstrate that a set of cooperative interactions between the different Ig-like domains ensure that VEGFR2 dimerizes with a specific affinity instead of forming oligomers. Conclusions The contributions of subunits D7 and D4 seem to be the most critical, as they appear essential for strong lateral interactions and for the formation of dimers, respectively. General significance This study provides new insights into the mechanism of VEGFR2 dimerization and activation.

Original languageEnglish (US)
Pages (from-to)2559-2567
Number of pages9
JournalBiochimica et Biophysica Acta - General Subjects
Volume1861
Issue number11
DOIs
StatePublished - Nov 1 2017

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ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology

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