3JVU

Crystal structure of unliganded P. aeruginosa PilT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

P. aeruginosa PilT structures with and without nucleotide reveal a dynamic type IV pilus retraction motor.

Misic, A.M.Satyshur, K.A.Forest, K.T.

(2010) J.Mol.Biol. 400: 1011-1021

  • DOI: 10.1016/j.jmb.2010.05.066
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Type IV pili are bacterial extracellular filaments that can be retracted to create force and motility. Retraction is accomplished by the motor protein PilT. Crystal structures of Pseudomonas aeruginosa PilT with and without bound beta,gamma-methylene ...

    Type IV pili are bacterial extracellular filaments that can be retracted to create force and motility. Retraction is accomplished by the motor protein PilT. Crystal structures of Pseudomonas aeruginosa PilT with and without bound beta,gamma-methyleneadenosine-5'-triphosphate have been solved at 2.6 A and 3.1 A resolution, respectively, revealing an interlocking hexamer formed by the action of a crystallographic 2-fold symmetry operator on three subunits in the asymmetric unit and held together by extensive ionic interactions. The roles of two invariant carboxylates, Asp Box motif Glu163 and Walker B motif Glu204, have been assigned to Mg(2+) binding and catalysis, respectively. The nucleotide ligands in each of the subunits in the asymmetric unit of the beta,gamma-methyleneadenosine-5'-triphosphate-bound PilT are not equally well ordered. Similarly, the three subunits in the asymmetric unit of both structures exhibit differing relative conformations of the two domains. The 12 degrees and 20 degrees domain rotations indicate motions that occur during the ATP-coupled mechanism of the disassembly of pili into membrane-localized pilin monomers. Integrating these observations, we propose a three-state "Ready, Active, Release" model for the action of PilT.


    Organizational Affiliation

    Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, 1550 Linden Drive, Madison, WI 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Twitching mobility protein
A, B, C
356Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: pilT
Find proteins for P24559 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  P24559
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIT
Query on CIT

Download SDF File 
Download CCD File 
B
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.229 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 108.240α = 90.00
b = 121.378β = 90.00
c = 184.406γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHASERphasing
HKL-2000data collection
HKL-2000data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance