Probing Cdc42 Polarization Dynamics in Budding Yeast Using a Biosensor

Satoshi Okada, Mid Eum Lee, Erfei Bi, Hay Oak Park

Research output: Chapter in Book/Report/Conference proceedingChapter

7 Citations (Scopus)

Abstract

Cdc42 is a small guanosine triphosphatase (GTPase) that plays a central role in polarity development in diverse cell types. Since the activity of Cdc42 is dynamically controlled in time and space, it is required to develop a biosensor to monitor its activation in vivo. In this chapter, we describe the construction and usage of a simple and robust biosensor for monitoring active Cdc42 in budding yeast. This affinity-based biosensor uses a red fluorescent protein fused to a Cdc42- and Rac-interactive binding motif from one of the Cdc42 effector proteins. Because it binds specifically to the GTP-bound Cdc42, this biosensor can be used to monitor Cdc42 activation in vivo. This or similar biosensors can be widely used for studying GTPase signaling in other cell types because of the conserved CRIB motif present among GTPase targets.

Original languageEnglish
Title of host publicationMethods in Enzymology
PublisherAcademic Press Inc.
Pages171-190
Number of pages20
DOIs
Publication statusPublished - 2017
Externally publishedYes

Publication series

NameMethods in Enzymology
Volume589
ISSN (Print)0076-6879
ISSN (Electronic)1557-7988

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology

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