4XNG

Central Domain of Mycoplasma Genitalium Terminal Organelle protein MG491


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure-Guided Mutations in the Terminal Organelle Protein MG491 Cause Major Motility and Morphologic Alterations on Mycoplasma genitalium.

Martinelli, L.Garcia-Morales, L.Querol, E.Pinol, J.Fita, I.Calisto, B.M.

(2016) Plos Pathog. 12: e1005533-e1005533

  • DOI: 10.1371/journal.ppat.1005533

  • PubMed Abstract: 
  • The emergent human pathogen Mycoplasma genitalium, with one of the smallest genomes among cells capable of growing in axenic cultures, presents a flask-shaped morphology due to a protrusion of the cell membrane, known as the terminal organelle, that ...

    The emergent human pathogen Mycoplasma genitalium, with one of the smallest genomes among cells capable of growing in axenic cultures, presents a flask-shaped morphology due to a protrusion of the cell membrane, known as the terminal organelle, that is involved in cell adhesion and motility and is an important virulence factor of this microorganism. The terminal organelle is supported by a cytoskeleton complex of about 300 nm in length that includes three substructures: the terminal button, the rod and the wheel complex. The crystal structure of the MG491 protein, a proposed component of the wheel complex, has been determined at ~3 Å resolution. MG491 subunits are composed of a 60-residue N-terminus, a central three-helix-bundle spanning about 150 residues and a C-terminal region that appears to be quite flexible and contains the region that interacts with MG200, another key protein of the terminal organelle. The MG491 molecule is a tetramer presenting a unique organization as a dimer of asymmetric pairs of subunits. The asymmetric arrangement results in two very different intersubunit interfaces between the central three-helix-bundle domains, which correlates with the formation of only ~50% of the intersubunit disulfide bridges of the single cysteine residue found in MG491 (Cys87). Moreover, M. genitalium cells with a point mutation in the MG491 gene causing the change of Cys87 to Ser present a drastic reduction in motility (as determined by microcinematography) and important alterations in morphology (as determined by electron microscopy), while preserving normal levels of the terminal organelle proteins. Other variants of MG491, designed also according to the structural information, altered significantly the motility and/or the cell morphology. Together, these results indicate that MG491 plays a key role in the functioning, organization and stabilization of the terminal organelle.


    Organizational Affiliation

    Instituto de Biología Molecular de Barcelona (IBMB-CSIC), Parc Científic de Barcelona, Barcelona, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein MG218.1
A, B, C, D
144Mycoplasma genitalium (strain ATCC 33530 / G-37 / NCTC 10195)Mutation(s): 1 
Find proteins for Q9ZB78 (Mycoplasma genitalium (strain ATCC 33530 / G-37 / NCTC 10195))
Go to UniProtKB:  Q9ZB78
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.226 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 98.270α = 90.00
b = 108.420β = 90.00
c = 62.190γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
PDB_EXTRACTdata extraction
SHELXDEphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministerio de Ciencia e InnovacionSpainBFU2012-36827

Revision History 

  • Version 1.0: 2016-03-30
    Type: Initial release
  • Version 1.1: 2016-04-27
    Type: Database references