3JC8

Architectural model of the type IVa pilus machine in a piliated state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

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This is version 1.2 of the entry. See complete history


Literature

Architecture of the type IVa pilus machine.

Chang, Y.W.Rettberg, L.A.Treuner-Lange, A.Iwasa, J.Sgaard-Andersen, L.Jensen, G.J.

(2016) Science 351: aad2001-aad2001

  • DOI: https://doi.org/10.1126/science.aad2001
  • Primary Citation of Related Structures:  
    3JC8, 3JC9

  • PubMed Abstract: 

    Type IVa pili are filamentous cell surface structures observed in many bacteria. They pull cells forward by extending, adhering to surfaces, and then retracting. We used cryo-electron tomography of intact Myxococcus xanthus cells to visualize type IVa pili and the protein machine that assembles and retracts them (the type IVa pilus machine, or T4PM) in situ, in both the piliated and nonpiliated states, at a resolution of 3 to 4 nanometers. We found that T4PM comprises an outer membrane pore, four interconnected ring structures in the periplasm and cytoplasm, a cytoplasmic disc and dome, and a periplasmic stem. By systematically imaging mutants lacking defined T4PM proteins or with individual proteins fused to tags, we mapped the locations of all 10 T4PM core components and the minor pilins, thereby providing insights into pilus assembly, structure, and function.


  • Organizational Affiliation

    California Institute of Technology, Pasadena, CA 91125, USA. Howard Hughes Medical Institute, Pasadena, CA 91125, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PilA158Myxococcus xanthus DK 1622Mutation(s): 0 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Type IV-A pilus assembly ATPase PilB566Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
Find proteins for Q1D098 (Myxococcus xanthus (strain DK1622))
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UniProt GroupQ1D098
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Type 4 fimbrial assembly protein PilCPA [auth Ca],
QA [auth Cb]
417Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
Find proteins for Q1D0A0 (Myxococcus xanthus (strain DK1622))
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
PilN225Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
PilO205Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Type IV pilus biogenesis protein PilM395Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
PilQ901Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
PilP172Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
LysM domain protein411Myxococcus xanthus DK 1622Mutation(s): 0 
UniProt
Find proteins for Q1D813 (Myxococcus xanthus (strain DK1622))
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Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MEA
Query on MEA
A [auth Aa]
AA [auth A1]
B [auth Ab]
BA [auth A2]
C [auth Ac]
A [auth Aa],
AA [auth A1],
B [auth Ab],
BA [auth A2],
C [auth Ac],
CA [auth A3],
D [auth Ad],
DA [auth A4],
E [auth Ae],
EA [auth A5],
F [auth Af],
FA [auth A6],
G [auth Ag],
GA [auth A7],
H [auth Ah],
HA [auth A8],
I [auth Ai],
IA [auth A9],
J [auth Aj],
K [auth Ak],
L [auth Al],
M [auth Am],
N [auth An],
O [auth Ao],
P [auth Ap],
Q [auth Aq],
R [auth Ar],
S [auth As],
T [auth At],
U [auth Au],
V [auth Av],
W [auth Aw],
X [auth Ax],
Y [auth Ay],
Z [auth Az]
L-PEPTIDE LINKINGC10 H13 N O2PHE
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONIMOD
RECONSTRUCTIONPEET
RECONSTRUCTIONTOMO3D

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2016-03-23
    Changes: Database references
  • Version 1.2: 2018-07-18
    Changes: Data collection