Absolute Arrangement of Subunits in Cytoskeletal Septin Filaments in Cells Measured by Fluorescence Microscopy

Nano Lett. 2015 Jun 10;15(6):3859-64. doi: 10.1021/acs.nanolett.5b00693. Epub 2015 May 8.

Abstract

We resolved the organization of subunits in cytoskeletal polymers in cells by light microscopy. Septin GTPases form linear complexes of about 32 nm length that polymerize into filaments. We visualized both termini of septin complexes by single molecule microscopy in vitro. Complexes appeared as 32 nm spaced localization pairs, and filaments appeared as stretches of equidistant localizations. Cellular septins were resolved as localization pairs and thin stretches of equidistant localizations.

Keywords: DNA origami; Septin; cytoskeleton; single molecule; superresolution microscopy.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cytoskeleton / chemistry*
  • Cytoskeleton / ultrastructure
  • Microscopy, Fluorescence
  • Saccharomyces cerevisiae / chemistry*
  • Saccharomyces cerevisiae Proteins / chemistry*
  • Septins / chemistry*

Substances

  • Saccharomyces cerevisiae Proteins
  • Septins