Myxococcus xanthus MglA bound to GDP and Pi with mixed inactive and active switch region conformations

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

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Ligand Structure Quality Assessment 

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MglA functions as a three-state GTPase to control movement reversals of Myxococcus xanthus.

Galicia, C.Lhospice, S.Varela, P.F.Trapani, S.Zhang, W.Navaza, J.Herrou, J.Mignot, T.Cherfils, J.

(2019) Nat Commun 10: 5300-5300

  • DOI: https://doi.org/10.1038/s41467-019-13274-3
  • Primary Citation of Related Structures:  
    6H17, 6H35, 6H5B, 6HJH, 6HJM, 6HJO

  • PubMed Abstract: 

    In Myxococcus xanthus, directed movement is controlled by pole-to-pole oscillations of the small GTPase MglA and its GAP MglB. Direction reversals require that MglA is inactivated by MglB, yet paradoxically MglA and MglB are located at opposite poles at reversal initiation. Here we report the complete MglA/MglB structural cycle combined to GAP kinetics and in vivo motility assays, which uncovers that MglA is a three-state GTPase and suggests a molecular mechanism for concerted MglA/MglB relocalizations. We show that MglA has an atypical GTP-bound state (MglA-GTP*) that is refractory to MglB and is re-sensitized by a feedback mechanism operated by MglA-GDP. By identifying and mutating the pole-binding region of MglB, we then provide evidence that the MglA-GTP* state exists in vivo. These data support a model in which MglA-GDP acts as a soluble messenger to convert polar MglA-GTP* into a diffusible MglA-GTP species that re-localizes to the opposite pole during reversals.

  • Organizational Affiliation

    Laboratoire de Biologie et Pharmacologie Appliquée, CNRS and Ecole Normale Supérieure Paris-Saclay, Cachan, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mutual gliding-motility protein MglA
A, B
201Myxococcus xanthus DK 1622Mutation(s): 0 
Gene Names: mglAMXAN_1925
Find proteins for Q1DB04 (Myxococcus xanthus (strain DK1622))
Explore Q1DB04 
Go to UniProtKB:  Q1DB04
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ1DB04
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GDP

Download Ideal Coordinates CCD File 
C [auth A],
K [auth B]
C10 H15 N5 O11 P2
Query on MPD

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
G [auth A]
H [auth A]
I [auth A]
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
L [auth B],
M [auth B],
N [auth B]
C6 H14 O2
Query on PO4

Download Ideal Coordinates CCD File 
O4 P
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.6α = 90
b = 116.65β = 90
c = 49.11γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
autoPROCdata scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-04
    Type: Initial release
  • Version 1.1: 2024-05-15
    Changes: Data collection, Database references, Refinement description