Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Near-atomic resolution reconstructions from in situ revitrified cryo samples
 
research article

Near-atomic resolution reconstructions from in situ revitrified cryo samples

Bongiovanni, Gabriele  
•
Harder, Oliver Florian  
•
Voss, Jonathan Mark  
Show more
June 1, 2023
Structural Biology

A microsecond time-resolved version of cryo-electron microscopy (cryo-EM) has recently been introduced to enable observation of the fast conformational motions of proteins. The technique involves locally melting a cryo sample with a laser beam to allow the proteins to undergo dynamics in the liquid phase. When the laser is switched off, the sample cools within just a few microseconds and revitrifies, trapping particles in their transient configurations, in which they can subsequently be imaged. Two alternative implementations of the technique have previously been described, using either an optical microscope or performing revitrification experiments in situ. Here, it is shown that it is possible to obtain near-atomic resolution reconstructions from in situ revitrified cryo samples. Moreover, the resulting map is indistinguishable from that obtained from a conventional sample within the spatial resolution. Interestingly, it is observed that revitrification leads to a more homogeneous angular distribution of the particles, suggesting that revitrification may potentially be used to overcome issues of preferred particle orientation.

  • Files
  • Details
  • Metrics
Type
research article
DOI
10.1107/S2059798323003431
Author(s)
Bongiovanni, Gabriele  
Harder, Oliver Florian  
Voss, Jonathan Mark  
Drabbels, Marcel  
Lorenz, Ulrich  
Date Issued

2023-06-01

Published in
Structural Biology
Volume

79

Start page

473

End page

478

Subjects

microsecond melting and revitrification

•

microsecond time-resolved cryo-EM

•

protein dynamics

•

time-resolved electron microscopy

•

preferential orientation

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LND  
Available on Infoscience
June 1, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/197872
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés