Quantification of membrane geometry and protein sorting on cell membrane protrusions using fluorescence microscopy

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Plasma membranes are flexible and can exhibit numerous shapes below the optical diffraction limit. The shape of cell periphery can either induce or be a product of local protein density changes, encoding numerous cellular functions. However, quantifying membrane curvature and the ensuing sorting of proteins in live cells remains technically demanding. Here, we demonstrate the use of simple widefield fluorescence microscopy to study the geometrical properties (i.e., radius, length, and number) of thin membrane protrusions. Importantly, the quantification of protrusion radius establishes a platform for studying the curvature preferences of membrane proteins.

Original languageAmerican English
Title of host publicationBiophysical Approaches for the Study of Membrane Structure - Part A
Subtitle of host publicationExperimental
PublisherAcademic Press Inc.
Pages385-411
Number of pages27
ISBN (Print)9780443293047
DOIs
StatePublished - Jan 2024

Publication series

NameMethods in Enzymology
Volume700

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology

Keywords

  • Cell membrane
  • Filopodia
  • Fluorescence microscopy
  • Image analysis
  • Membrane curvature
  • Protein sorting

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