Carbon replicas reveal double stranded structure of tight junctions in phase-contrast electron microscopy

Commun Biol. 2019 Mar 12:2:98. doi: 10.1038/s42003-019-0319-4. eCollection 2019.

Abstract

Replica-based freeze-fracture and freeze-etching electron microscopy methods provide surface topography information, particularly suited to studying membrane protein complexes in their native context. The fidelity and resolution of metal replicas is limited by the inherent property of metal atoms to crystallize. To overcome the limitations of metal replicas, we combined amorphous carbon replicas with phase-contrast electron microscopy. Using this approach, tight junction intramembrane fibrils were shown to have a double stranded morphology.

Publication types

  • Research Support, N.I.H., Intramural

MeSH terms

  • Carbon* / chemistry
  • Humans
  • Microscopy, Electron* / methods
  • Tight Junctions / ultrastructure*

Substances

  • Carbon