2PIL

Crystallographic Structure of Phosphorylated Pilin from Neisseria: Phosphoserine Sites Modify Type IV Pilus Surface Chemistry


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic structure reveals phosphorylated pilin from Neisseria: phosphoserine sites modify type IV pilus surface chemistry and fibre morphology.

Forest, K.T.Dunham, S.A.Koomey, M.Tainer, J.A.

(1999) Mol.Microbiol. 31: 743-752


  • PubMed Abstract: 
  • Understanding the structural biology of type IV pili, fibres responsible for the virulent attachment and motility of numerous bacterial pathogens, requires a detailed understanding of the three-dimensional structure and chemistry of the constituent p ...

    Understanding the structural biology of type IV pili, fibres responsible for the virulent attachment and motility of numerous bacterial pathogens, requires a detailed understanding of the three-dimensional structure and chemistry of the constituent pilin subunit. X-ray crystallographic refinement of Neisseria gonorrhoeae pilin against diffraction data to 2.6 A resolution, coupled with mass spectrometry of peptide fragments, reveals phosphoserine at residue 68. Phosphoserine is exposed on the surface of the modelled type IV pilus at the interface of neighbouring pilin molecules. The site-specific mutation of serine 68 to alanine showed that the loss of the phosphorylation alters the morphology of fibres examined by electron microscopy without a notable effect on adhesion, transformation, piliation or twitching motility. The structural and chemical characterization of protein phosphoserine in type IV pilin subunits is an important indication that this modification, key to numerous regulatory aspects of eukaryotic cell biology, exists in the virulence factor proteins of bacterial pathogens. These O-linked phosphate modifications, unusual in prokaryotes, thus merit study for possible roles in pilus biogenesis and modulation of pilin chemistry for optimal in vivo function.


    Related Citations: 
    • Structure of the Fibre-Forming Protein Pilin at 2.6 A Resolution
      Parge, H.E.,Forest, K.T.,Hickey, M.J.,Christensen, D.A.,Getzoff, E.D.,Tainer, J.A.
      (1995) Nature 378: 32


    Organizational Affiliation

    Department of Molecular Biology, Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TYPE 4 PILIN
A
158Neisseria gonorrhoeaeMutation(s): 0 
Gene Names: pilE1
Find proteins for P02974 (Neisseria gonorrhoeae)
Go to UniProtKB:  P02974
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PT
Query on PT

Download SDF File 
Download CCD File 
A
PLATINUM (II) ION
Pt
HRGDZIGMBDGFTC-UHFFFAOYSA-N
 Ligand Interaction
HTO
Query on HTO

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Download CCD File 
A
HEPTANE-1,2,3-TRIOL
C7 H16 O3
HXYCHJFUBNTKQR-RNFRBKRXSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
GLA
Query on GLA

Download SDF File 
Download CCD File 
A
ALPHA D-GALACTOSE
C6 H12 O6
WQZGKKKJIJFFOK-PHYPRBDBSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
MEA
Query on MEA
A
L-PEPTIDE LINKINGC10 H13 N O2PHE
SEP
Query on SEP
A
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Work: 0.187 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 127.580α = 90.00
b = 121.080β = 90.00
c = 26.860γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
ROTAVATA/AGROVATAdata reduction
ROTAVATA)data scaling
MOSFLMdata reduction
CCP4data scaling
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-05-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance