2EWW

Crystal Structure of the Pilus Retraction Motor PilT and Bound ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of the pilus retraction motor PilT suggest large domain movements and subunit cooperation drive motility.

Satyshur, K.A.Worzalla, G.A.Meyer, L.S.Heiniger, E.K.Aukema, K.G.Misic, A.M.Forest, K.T.

(2007) Structure 15: 363-376

  • DOI: 10.1016/j.str.2007.01.018
  • Primary Citation of Related Structures:  2EWV, 2EYU, 2GSZ

  • PubMed Abstract: 
  • PilT is a hexameric ATPase required for bacterial type IV pilus retraction and surface motility. Crystal structures of ADP- and ATP-bound Aquifex aeolicus PilT at 2.8 and 3.2 A resolution show N-terminal PAS-like and C-terminal RecA-like ATPase domai ...

    PilT is a hexameric ATPase required for bacterial type IV pilus retraction and surface motility. Crystal structures of ADP- and ATP-bound Aquifex aeolicus PilT at 2.8 and 3.2 A resolution show N-terminal PAS-like and C-terminal RecA-like ATPase domains followed by a set of short C-terminal helices. The hexamer is formed by extensive polar subunit interactions between the ATPase core of one monomer and the N-terminal domain of the next. An additional structure captures a nonsymmetric PilT hexamer in which approach of invariant arginines from two subunits to the bound nucleotide forms an enzymatically competent active site. A panel of pilT mutations highlights the importance of the arginines, the PAS-like domain, the polar subunit interface, and the C-terminal helices for retraction. We present a model for ATP binding leading to dramatic PilT domain motions, engagement of the arginine wire, and subunit communication in this hexameric motor. Our conclusions apply to the entire type II/IV secretion ATPase family.


    Related Citations: 
    • The pilus-retraction protein PilT: ultrastructure of the biological assembly
      Forest, K.T.,Satyshur, K.A.,Worzalla, G.A.,Hansen, J.K.,Herdendorf, T.J.
      (2004) Acta Crystallogr.,Sect.D 60: 978


    Organizational Affiliation

    Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
twitching motility protein PilT
A
372Aquifex aeolicus (strain VF5)Gene Names: pilT
Find proteins for O66950 (Aquifex aeolicus (strain VF5))
Go to UniProtKB:  O66950
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.239 
  • Space Group: P 6
Unit Cell:
Length (Å)Angle (°)
a = 107.380α = 90.00
b = 107.380β = 90.00
c = 68.860γ = 120.00
Software Package:
Software NamePurpose
SHARPphasing
REFMACrefinement
CCP4data scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-21
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance