Evidence map›Paper›PMID 33199922›Full record

ArticleNature structural & molecular biology2021

Structural insights into outer membrane asymmetry maintenance in Gram-negative bacteria by MlaFEDB.

Xiaodi Tang, Shenghai Chang, Wen Qiao, Qinghua Luo, Yuejia Chen, Zhiying Jia, James Coleman, Ke Zhang, Ting Wang, Zhibo Zhang and 6 more

Abstract read
PubMed Publisher
In one paragraph

Article in Nature structural & molecular biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
–field-weighted citation impact
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

67 citing papers in PubMed.

  1. Article
  2. Mce transport systems inJournal of bacteriology · 2026
    Review
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  13. Bottom-up Coarse-Grained Models of Asymmetric Membranes.The journal of physical chemistry. B · 2025
    Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Following phospholipid transfer through the OmpFProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  19. Article
  20. Lipid Trafficking in Diverse Bacteria.Accounts of chemical research · 2025
    Review

7 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

16 authors.

Xiaodi Tang *State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Shenghai Chang *Department of Pathology of Sir Run Run Shaw Hospital and Department of Biophysics, Zhejiang University, School of Medicine, Hangzhou, China.
Wen Qiao *State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Qinghua LuoState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Yuejia ChenState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Zhiying JiaDepartment of Pathology of Sir Run Run Shaw Hospital and Department of Biophysics, Zhejiang University, School of Medicine, Hangzhou, China.
James ColemanBiomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich, UK.ORCID http://orcid.org/0000-0001-7430-2587
Ke ZhangState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Ting WangState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Zhibo ZhangState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Changbin ZhangState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Xiaofeng ZhuState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Xiawei WeiState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China.
Changjiang DongBiomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich, UK. c.dong@uea.ac.uk.ORCID http://orcid.org/0000-0002-7020-5648
Xing ZhangDepartment of Pathology of Sir Run Run Shaw Hospital and Department of Biophysics, Zhejiang University, School of Medicine, Hangzhou, China. xzhang1999@zju.edu.cn.ORCID http://orcid.org/0000-0002-6776-326X
Haohao DongState Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China. haohaodong@scu.edu.cn.ORCID http://orcid.org/0000-0002-5022-3494

Funding

Medical Research Council G1100110Wellcome Trust WT106121MA
6 · The paper itself

Abstract

The highly asymmetric outer membrane of Gram-negative bacteria functions in the defense against cytotoxic substances, such as antibiotics. The Mla pathway maintains outer membrane lipid asymmetry by transporting phospholipids between the inner and outer membranes. It comprises six Mla proteins, MlaFEDBCA, including the ABC transporter MlaFEDB, which functions via an unknown mechanism. Here we determine cryo-EM structures of Escherichia coli MlaFEDB in an apo state and bound to phospholipid, ADP or AMP-PNP to a resolution of 3.3-4.1 Å and establish a proteoliposome-based transport system that includes MlaFEDB, MlaC and MlaA-OmpF to monitor the transport direction of phospholipids. In vitro transport assays and in vivo membrane permeability assays combined with mutagenesis identify functional residues that not only recognize and transport phospholipids but also regulate the activity and structural stability of the MlaFEDB complex. Our results provide mechanistic insights into the Mla pathway, which could aid antimicrobial drug development.

Indexed as

ATP-Binding Cassette TransportersBacterial Outer Membrane ProteinsCell MembraneCryoelectron MicroscopyEscherichia coliEscherichia coli ProteinsMembrane ProteinsMembrane Transport ProteinsPhospholipidsPhospholipid Transfer ProteinsPorinsProtein TransportProteolipidsATP-Binding Cassette TransportersBacterial Outer Membrane ProteinsEscherichia coli ProteinsMembrane ProteinsMembrane Transport ProteinsMlaA protein, E coliMlaB protein, E colimlaC protein, E coliMlaD protein, E coliMlaF protein, E coliOmpF proteinPhospholipidsPhospholipid Transfer ProteinsPorinsProteolipidsproteoliposomes

Identifiers

What OpenQuestion holds

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Registered trials

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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.