6OLJ

CryoEM structure of PilB from Geobacter metallireducens: C2ccocco conformation


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Multiple conformations facilitate PilT function in the type IV pilus.

McCallum, M.Benlekbir, S.Nguyen, S.Tammam, S.Rubinstein, J.L.Burrows, L.L.Howell, P.L.

(2019) Nat Commun 10: 5198-5198

  • DOI: https://doi.org/10.1038/s41467-019-13070-z
  • Primary Citation of Related Structures:  
    6OJX, 6OJY, 6OJZ, 6OK2, 6OKV, 6OLJ, 6OLK, 6OLL, 6OLM

  • PubMed Abstract: 

    Type IV pilus-like systems are protein complexes that polymerize pilin fibres. They are critical for virulence in many bacterial pathogens. Pilin polymerization and depolymerization are powered by motor ATPases of the PilT/VirB11-like family. This family is thought to operate with C 2 symmetry; however, most of these ATPases crystallize with either C 3 or C 6 symmetric conformations. The relevance of these conformations is unclear. Here, we determine the X-ray structures of PilT in four unique conformations and use these structures to classify the conformation of available PilT/VirB11-like family member structures. Single particle electron cryomicroscopy (cryoEM) structures of PilT reveal condition-dependent preferences for C 2, C 3 , and C 6 conformations. The physiologic importance of these conformations is validated by coevolution analysis and functional studies of point mutants, identifying a rare gain-of-function mutation that favours the C 2 conformation. With these data, we propose a comprehensive model of PilT function with broad implications for PilT/VirB11-like family members.


  • Organizational Affiliation

    Department of Biochemistry, University of Toronto, Toronto, ON, M5S 1A8, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Type IV pilus biogenesis ATPase PilB588Geobacter metallireducens GS-15Mutation(s): 0 
Gene Names: pilBGmet_1393
UniProt
Find proteins for Q39VU7 (Geobacter metallireducens (strain ATCC 53774 / DSM 7210 / GS-15))
Explore Q39VU7 
Go to UniProtKB:  Q39VU7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ39VU7
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC2
MODEL REFINEMENTPHENIX1.14

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada--

Revision History  (Full details and data files)

  • Version 1.0: 2019-11-20
    Type: Initial release
  • Version 1.1: 2019-11-27
    Changes: Database references
  • Version 1.2: 2020-01-15
    Changes: Author supporting evidence
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Other, Refinement description