6W6M

Single particle cryoEM structure of V. cholerae Type IV competence pilus secretin PilQ

  • Classification: TRANSPORT PROTEIN
  • Organism(s): Vibrio cholerae
  • Mutation(s): No 

  • Deposited: 2020-03-17 Released: 2020-10-14 
  • Deposition Author(s): Sazinsky, M.H., Weaver, S.J.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.70 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

CryoEM structure of the type IVa pilus secretin required for natural competence in Vibrio cholerae.

Weaver, S.J.Ortega, D.R.Sazinsky, M.H.Dalia, T.N.Dalia, A.B.Jensen, G.J.

(2020) Nat Commun 11: 5080-5080

  • DOI: 10.1038/s41467-020-18866-y
  • Primary Citation of Related Structures:  
    6W6M

  • PubMed Abstract: 
  • Natural transformation is the process by which bacteria take up genetic material from their environment and integrate it into their genome by homologous recombination. It represents one mode of horizontal gene transfer and contributes to the spread o ...

    Natural transformation is the process by which bacteria take up genetic material from their environment and integrate it into their genome by homologous recombination. It represents one mode of horizontal gene transfer and contributes to the spread of traits like antibiotic resistance. In Vibrio cholerae, a type IVa pilus (T4aP) is thought to facilitate natural transformation by extending from the cell surface, binding to exogenous DNA, and retracting to thread this DNA through the outer membrane secretin, PilQ. Here, we use a functional tagged allele of VcPilQ purified from native V. cholerae cells to determine the cryoEM structure of the VcPilQ secretin in amphipol to ~2.7 Å. We use bioinformatics to examine the domain architecture and gene neighborhood of T4aP secretins in Proteobacteria in comparison with VcPilQ. This structure highlights differences in the architecture of the T4aP secretin from the type II and type III secretion system secretins. Based on our cryoEM structure, we design a series of mutants to reversibly regulate VcPilQ gate dynamics. These experiments support the idea of VcPilQ as a potential druggable target and provide insight into the channel that DNA likely traverses to promote the spread of antibiotic resistance via horizontal gene transfer by natural transformation.


    Organizational Affiliation

    Howard Hughes Medical Institute, David Geffen School of Medicine, Departments of Biological Chemistry and Physiology, University of California Los Angeles, 615 Charles E Young Drive South, Los Angeles, CA, 90095, USA. jensen@caltech.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Type IV pilus secretin PilQ family proteinABCDEFGHIJKLMN571Vibrio choleraeMutation(s): 0 
Gene Names: C9J66_07060D6U80_10035
Find proteins for A0A2V4P274 (Vibrio cholerae)
Explore A0A2V4P274 
Go to UniProtKB:  A0A2V4P274
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM128674

Revision History 

  • Version 1.0: 2020-10-14
    Type: Initial release
  • Version 1.1: 2020-10-21
    Changes: Database references