Evidence map›Paper›PMID 34468314›Full record

ArticleeLife2021

In situ imaging of bacterial outer membrane projections and associated protein complexes using electron cryo-tomography.

Mohammed Kaplan, Georges Chreifi, Lauren Ann Metskas, Janine Liedtke, Cecily R Wood, Catherine M Oikonomou, William J Nicolas, Poorna Subramanian, Lori A Zacharoff, Yuhang Wang and 8 more

Open access · goldAbstract readVideo-Audio Media
In one paragraph

Article in eLife, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
3.5field-weighted citation impact, top 6% 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

22 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. International journal of molecular sciences · 2025
    Article
  5. Article
  6. In situ NMR reveals a pH sensor motif in an outer membrane protein that drives bacterial vesicle production.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. An outer membrane vesicle specific lipoprotein promotesCurrent research in microbial sciences · 2024
    Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Outer Membrane Vesicles: Biogenesis, Functions, and Issues.Microbiology and molecular biology reviews : MMBR · 2022
    Review
  19. Article
  20. Review
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

18 authors at 10 institutions in 3 countries.

Mohammed KaplanDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0002-0759-0459
Georges ChreifiDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0003-4194-1694
Lauren Ann MetskasDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0002-8073-6960
Janine LiedtkeLeiden University, Sylvius Laboratories, Leiden, Netherlands.ORCID 0000-0003-2680-4130
Cecily R WoodDepartment of Veterinary Science, University of Kentucky, Lexington, United States.
Catherine M OikonomouDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0003-2312-4746
William J NicolasDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0001-5970-8626
Poorna SubramanianDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.
Lori A ZacharoffDepartment of Physics and Astronomy, University of Southern California, Los Angeles, United States.
Yuhang WangDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0003-3715-8349
Yi-Wei ChangDepartment of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, United States.ORCID 0000-0003-2391-473X
Morgan BeebyDepartment of Life Sciences, Imperial College London, London, United Kingdom.ORCID 0000-0001-6413-9835
Megan J DobroHampshire College, Amherst, United States.ORCID 0000-0002-6464-3932
Yongtao ZhuDepartment of Biological Sciences, Minnesota State University, Mankato, United States.ORCID 0000-0002-3069-6518
Mark J McBrideDepartment of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, United States.ORCID 0000-0002-3798-6761
Ariane BriegelLeiden University, Sylvius Laboratories, Leiden, Netherlands.ORCID 0000-0003-3733-3725
Carrie L ShafferDepartment of Veterinary Science, University of Kentucky, Lexington, United States.ORCID 0000-0002-7457-7422
Grant J JensenDivision of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.ORCID 0000-0003-1556-4864
California Institute of Technology · USLeiden University · NLUniversity of Kentucky · USBrigham Young University · USHampshire College · USImperial College London · GBMinnesota State University, Mankato · USUniversity of Pennsylvania · USUniversity of Southern California · USUniversity of Wisconsin–Milwaukee · US

Funding

Understanding the role of anti-apolipoprotein A-I antibodies in atherosclerotic cardiovascular diseaseP20GM130456 · NIGMS · UNIVERSITY OF KENTUCKY · PI M. Ashfaqul Alam · 2020 to 2026
$18.7M
Imaging large macromolecular complexes inside cells with electron cryotomographyR35GM122588 · NIGMS · CALIFORNIA INSTITUTE OF TECHNOLOGY · PI JENSEN, GRANT J · 2017 to 2020
$1.9M
NIGMS NIH HHS P20 GM130456NIGMS NIH HHS R35 GM122588
6 · The paper itself

Abstract

The ability to produce outer membrane projections in the form of tubular membrane extensions (MEs) and membrane vesicles (MVs) is a widespread phenomenon among diderm bacteria. Despite this, our knowledge of the ultrastructure of these extensions and their associated protein complexes remains limited. Here, we surveyed the ultrastructure and formation of MEs and MVs, and their associated protein complexes, in tens of thousands of electron cryo-tomograms of ~90 bacterial species that we have collected for various projects over the past 15 years (Jensen lab database), in addition to data generated in the Briegel lab. We identified outer MEs and MVs in 13 diderm bacterial species and classified several major ultrastructures: (1) tubes with a uniform diameter (with or without an internal scaffold), (2) tubes with irregular diameter, (3) tubes with a vesicular dilation at their tip, (4) pearling tubes, (5) connected chains of vesicles (with or without neck-like connectors), (6) budding vesicles and nanopods. We also identified several protein complexes associated with these MEs and MVs which were distributed either randomly or exclusively at the tip. These complexes include a secretin-like structure and a novel crown-shaped structure observed primarily in vesicles from lysed cells. In total, this work helps to characterize the diversity of bacterial membrane projections and lays the groundwork for future research in this field.

Indexed as

Cryoelectron MicroscopyElectron Microscope TomographyBacteriaBacterial Outer MembraneBacterial Outer Membrane ProteinsCell Surface ExtensionsMultiprotein ComplexesBacterial Outer Membrane ProteinsMultiprotein Complexesbacteriacryo-ETinfectious diseasemembrane extensionsmicrobiologysecretintubesvesicles

Identifiers

PMID34468314
PMCPMC8455137
OpenAlexW3197634731

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.