2CA5

MxiH needle protein of Shigella Flexneri (monomeric form, residues 1- 78)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Model of a Type III Secretion System Needle: Implications for Host-Cell Sensing

Deane, J.E.Roversi, P.Cordes, F.S.Johnson, S.Kenjale, R.Daniell, S.Booy, F.Picking, W.L.Picking, W.D.Blocker, A.J.Lea, S.M.

(2006) Proc.Natl.Acad.Sci.USA 103: 12529

  • DOI: 10.1073/pnas.0602689103
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Type III secretion systems are essential virulence determinants for many Gram-negative bacterial pathogens. The type III secretion system consists of cytoplasmic, transmembrane, and extracellular domains. The extracellular domain is a hollow needle p ...

    Type III secretion systems are essential virulence determinants for many Gram-negative bacterial pathogens. The type III secretion system consists of cytoplasmic, transmembrane, and extracellular domains. The extracellular domain is a hollow needle protruding above the bacterial surface and is held within a basal body that traverses both bacterial membranes. Effector proteins are translocated, via this external needle, directly into host cells, where they subvert normal cell functions to aid infection. Physical contact with host cells initiates secretion and leads to formation of a pore, thought to be contiguous with the needle channel, in the host-cell membrane. Here, we report the crystal structure of the Shigella flexneri needle subunit MxiH and a complete model for the needle assembly built into our three-dimensional EM reconstruction. The model, combined with mutagenesis data, reveals that signaling of host-cell contact is relayed through the needle via intersubunit contacts and suggests a mode of binding for a tip complex.


    Related Citations: 
    • Expression, Purification, Crystallization and Preliminary Crystallographic Analysis of Mxih, a Subunit of the Shigella Flexneri Type III Secretion System Needle.
      Deane, J.E.,Cordes, F.S.,Roversi, P.,Johnson, S.,Kenjale, R.,Picking, W.D.,Picking, W.L.,Lea, S.M.,Blocker, A.
      (2006) Acta Crystallogr.,Sect.F 62: 302


    Organizational Affiliation

    Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, Oxford OX1 3QU, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MXIH
A, B
85Shigella flexneriMutation(s): 0 
Gene Names: mxiH
Find proteins for P0A223 (Shigella flexneri)
Go to UniProtKB:  P0A223
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A, B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download SDF File 
Download CCD File 
A
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.194 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 183.203α = 90.00
b = 28.123β = 96.47
c = 27.723γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
SHARPphasing
SOLOMONphasing
SIGMAAphasing
DMphasing
TNTrefinement
SIGMAAmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-08-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance