Nature Communications (Oct 2021)

Regulation of local GTP availability controls RAC1 activity and cell invasion

  • Anna Bianchi-Smiraglia,
  • David W. Wolff,
  • Daniel J. Marston,
  • Zhiyong Deng,
  • Zhannan Han,
  • Sudha Moparthy,
  • Rebecca M. Wombacher,
  • Ashley L. Mussell,
  • Shichen Shen,
  • Jialin Chen,
  • Dong-Hyun Yun,
  • Anderson O’Brien Cox,
  • Cristina M. Furdui,
  • Edward Hurley,
  • Maria Laura Feltri,
  • Jun Qu,
  • Thomas Hollis,
  • Jules Berlin Nde Kengne,
  • Bernard Fongang,
  • Rui J. Sousa,
  • Mikhail E. Kandel,
  • Eugene S. Kandel,
  • Klaus M. Hahn,
  • Mikhail A. Nikiforov

DOI
https://doi.org/10.1038/s41467-021-26324-6
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 15

Abstract

Read online

Changes in intracellular GTP levels are not considered as a regulatory event in RAC1 activation in live cells since total GTP levels are substantially higher than the RAC1 GTP dissociation constant determined in vitro. Here, the authors demonstrate that the availability of free GTP in live cells controls the activity of RAC1 and cell invasion.