Evidence map›Paper›PMID 32680969›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2020

Cryo-EM analysis of a membrane protein embedded in the liposome.

Xia Yao, Xiao Fan, Nieng Yan

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 86 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
86citing papers in PubMed, 1 pooled it
7.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

86 citing papers in PubMed, 1 synthesis or guideline pooled it, 151 citations in OpenAlex.

  1. Pooled it
  2. Controlling membrane tension by dynamic DNA nanorings.bioRxiv : the preprint server for biology · 2026
    Article
  3. Article
  4. Article
  5. Temperature and intrinsic CaNature structural & molecular biology · 2026
    Article
  6. Article
  7. Review
  8. Article
  9. Structural Analysis of Membrane Proteins in Cell-Derived Microvesicles.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  10. Article
  11. Article
  12. Capturing the native structure of membrane proteins using vesicles.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  13. Article
  14. Design of a water-soluble CD20 antigen with computational epitope scaffolding.Protein science : a publication of the Protein Society · 2025
    Article
  15. Foam film vitrification for cryo-EM.Nature communications · 2025
    Article
  16. Article
  17. Review
  18. Review
  19. Review
  20. Article

26 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Xia YaoDepartment of Molecular Biology, Princeton University, Princeton, NJ 08544.ORCID 0000-0003-2406-268X
Xiao FanDepartment of Molecular Biology, Princeton University, Princeton, NJ 08544 xiaof@princeton.edu nyan@princeton.edu.ORCID 0000-0001-9855-1641
Nieng YanDepartment of Molecular Biology, Princeton University, Princeton, NJ 08544 xiaof@princeton.edu nyan@princeton.edu.ORCID 0000-0003-4829-7416
Princeton University · US

Funding

Structural investigation of the gating and regulatory mechanism of voltage-gated Ca2+ channelsR01GM130762 · NIGMS · PRINCETON UNIVERSITY · PI YAN, NIENG · 2019 to 2022
$1.4M
NIGMS NIH HHS R01 GM130762
6 · The paper itself

Abstract

Membrane proteins (MPs) used to be the most difficult targets for structural biology when X-ray crystallography was the mainstream approach. With the resolution revolution of single-particle electron cryo-microscopy (cryo-EM), rapid progress has been made for structural elucidation of isolated MPs. The next challenge is to preserve the electrochemical gradients and membrane curvature for a comprehensive structural elucidation of MPs that rely on these chemical and physical properties for their biological functions. Toward this goal, here we present a convenient workflow for cryo-EM structural analysis of MPs embedded in liposomes, using the well-characterized AcrB as a prototype. Combining optimized proteoliposome isolation, cryo-sample preparation on graphene grids, and an efficient particle selection strategy, the three-dimensional (3D) reconstruction of AcrB embedded in liposomes was obtained at 3.9 Å resolution. The conformation of the homotrimeric AcrB remains the same when the surrounding membranes display different curvatures. Our approach, which can be widely applied to cryo-EM analysis of MPs with distinctive soluble domains, lays out the foundation for cryo-EM analysis of integral or peripheral MPs whose functions are affected by transmembrane electrochemical gradients or/and membrane curvatures.

Indexed as

ATP-Binding Cassette, Sub-Family C ProteinsCell MembraneCryoelectron MicroscopyEscherichia coliEscherichia coli ProteinsLiposomesMembrane ProteinsModels, MolecularProtein ConformationAcrB protein, E coliATP-Binding Cassette, Sub-Family C ProteinsEscherichia coli ProteinsLiposomesMembrane Proteinscryo-EMgraphene gridsmembrane proteinproteoliposomestructural biology

Identifiers

PMID32680969
PMCPMC7414195
OpenAlexW3043621712

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.