6H5B

Small GTPase in complex with its GAP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

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: 10.1038/s41467-019-13274-3
  • Primary Citation of Related Structures:  

  • 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 ...

    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 d'Enzymologie et Biochimie Structurale, CNRS, Gif-sur-Yvette, France.,School of Life Sciences, Lanzhou University, Lanzhou, China.,Laboratoire de Chimie Bactérienne, CNRS-Université Aix-Marseille, Marseille, France.,Laboratoire de Biologie et Pharmacologie Appliquée, CNRS and Ecole Normale Supérieure Paris-Saclay, Cachan, France. jacqueline.cherfils@ens-paris-saclay.fr.,Laboratoire de Biologie et Pharmacologie Appliquée, CNRS and Ecole Normale Supérieure Paris-Saclay, Cachan, France.,Centre de Biochimie Structurale (CBS), INSERM-CNRS-Université de Montpellier, Montpellier, France.,Laboratoire d'Enzymologie et Biochimie Structurale, CNRS, Gif-sur-Yvette, France. jacqueline.cherfils@ens-paris-saclay.fr.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mutual gliding-motility protein MglA
A
201Myxococcus xanthus (strain DK 1622)Mutation(s): 0 
Gene Names: mglA
Find proteins for Q1DB04 (Myxococcus xanthus (strain DK 1622))
Go to UniProtKB:  Q1DB04
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MglB
B, C
160Myxococcus xanthusMutation(s): 0 
Gene Names: mglB
Find proteins for Q50883 (Myxococcus xanthus)
Go to UniProtKB:  Q50883
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download SDF File 
Download CCD File 
A
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
HEPES
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GSP
Query on GSP

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Download CCD File 
A
5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
C10 H16 N5 O13 P3 S
XOFLBQFBSOEHOG-UUOKFMHZSA-N
 Ligand Interaction
PEG
Query on PEG

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Download CCD File 
B, C
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
1PE
Query on 1PE

Download SDF File 
Download CCD File 
A, C
PENTAETHYLENE GLYCOL
PEG400
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.199 
  • Space Group: P 64
Unit Cell:
Length (Å)Angle (°)
a = 135.101α = 90.00
b = 135.101β = 90.00
c = 60.382γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
AutoPROCdata scaling
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
French National Research AgencyFrance--

Revision History 

  • Version 1.0: 2019-11-27
    Type: Initial release
  • Version 1.1: 2019-12-04
    Type: Database references