Unsupervised particle sorting for high-resolution single-particle cryo-EM

Ye Zhou, Amit Moscovich, Tamir Bendory, Alberto Bartesaghi

Research output: Contribution to journalArticlepeer-review

Abstract

Single-particle cryo-electron microscopy (EM) has become a popular technique for determining the structure of challenging biomolecules that are inaccessible to other technologies. Recent advances in automation, both in data collection and data processing, have significantly lowered the barrier for non-expert users to successfully execute the structure determination workflow. Many critical data processing steps, however, still require expert user intervention in order to converge to the correct high-resolution structure. In particular, strategies to identify homogeneous populations of particles rely heavily on subjective criteria that are not always consistent or reproducible among different users. Here, we explore the use of unsupervised strategies for particle sorting that are compatible with the autonomous operation of the image processing pipeline. More specifically, we show that particles can be successfully sorted based on a simple statistical model for the distribution of scores assigned during refinement. This represents an important step towards the development of automated workflows for protein structure determination using single-particle cryo-EM.

Original languageEnglish
Article number044002
JournalInverse Problems
Volume36
Issue number4
DOIs
StatePublished - 2020

Keywords

  • Cryo-electron microscopy
  • high-resolution microscopy
  • image analysis
  • single particle analysis
  • unsupervised image sorting

Fingerprint

Dive into the research topics of 'Unsupervised particle sorting for high-resolution single-particle cryo-EM'. Together they form a unique fingerprint.

Cite this