6IOL

Cryo-EM structure of multidrug efflux pump MexAB-OprM (60 degree state)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.76 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of the wild-type MexAB-OprM tripartite pump reveal its complex formation and drug efflux mechanism.

Tsutsumi, K.Yonehara, R.Ishizaka-Ikeda, E.Miyazaki, N.Maeda, S.Iwasaki, K.Nakagawa, A.Yamashita, E.

(2019) Nat Commun 10: 1520-1520

  • DOI: 10.1038/s41467-019-09463-9
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • In Pseudomonas aeruginosa, MexAB-OprM plays a central role in multidrug resistance by ejecting various drug compounds, which is one of the┬ácauses of serious nosocomial infections. Although the structures of the components of MexAB-OprM have been solv ...

    In Pseudomonas aeruginosa, MexAB-OprM plays a central role in multidrug resistance by ejecting various drug compounds, which is one of the causes of serious nosocomial infections. Although the structures of the components of MexAB-OprM have been solved individually by X-ray crystallography, no structural information for fully assembled pumps from P. aeruginosa were previously available. In this study, we present the structure of wild-type MexAB-OprM in the presence or absence of drugs at near-atomic resolution. The structure reveals that OprM does not interact with MexB directly, and that it opens its periplasmic gate by forming a complex. Furthermore, we confirm the residues essential for complex formation and observed a movement of the drug entrance gate. Based on these results, we propose mechanisms for complex formation and drug efflux.


    Organizational Affiliation

    Institute for Protein Research, Osaka University, Suita, 565-0871, Osaka, Japan. eiki@protein.osaka-u.ac.jp.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Multidrug resistance protein MexAI, J, K, L, M, N362Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: mexAPA0425
Find proteins for P52477 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P52477 
Go to UniProtKB:  P52477
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein OprMA, B, C474Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: oprMoprKPA0427
Find proteins for Q51487 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q51487 
Go to UniProtKB:  Q51487
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Multidrug resistance protein MexBE, F, G1054Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: mexBPA0426
Find proteins for P52002 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P52002 
Go to UniProtKB:  P52002
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.76 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of ScienceJapanJP25291014
Ministry of Education, Culture, Sports, Science and Technology (Japan)JapanJP22121006
Japan Agency for Medical Research and Development (AMED)Japan--

Revision History 

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references