The abstract is read at the publisher; the summary is JClub's.
SPARC Cdc42 biosensors track individual Cdc42 conformational changes in live cells and reveal localized activity gradients and heterogeneously distributed Cdc42 microclusters.
- Why it matters: Rho-family GTPase switching depends on conformational dynamics that vary spatially and kinetically, but how these dynamics map onto gradients and clusters in living cells is unclear.
- What they did: The authors built SPARC Cdc42 and SPARC Rac1 constructs using environment-responsive fluorescent dyes, then used SPARC Cdc42 to measure rates for activation/inactivation and membrane insertion steps.
- The result: The measured step rates explain how localized Cdc42 activity gradients form and show that Cdc42 clusters have distinct activation mechanisms linked to polarized motility.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.