3UOR

The structure of the sugar-binding protein MalE from the phytopathogen Xanthomonas citri


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.202 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure determination of a sugar-binding protein from the phytopathogenic bacterium Xanthomonas citri.

Medrano, F.J.de Souza, C.S.Romero, A.Balan, A.

(2014) Acta Crystallogr F Struct Biol Commun 70: 564-571

  • DOI: 10.1107/S2053230X14006578

  • PubMed Abstract: 
  • The uptake of maltose and related sugars in Gram-negative bacteria is mediated by an ABC transporter encompassing a periplasmic component (the maltose-binding protein or MalE), a pore-forming membrane protein (MalF and MalG) and a membrane-associated ...

    The uptake of maltose and related sugars in Gram-negative bacteria is mediated by an ABC transporter encompassing a periplasmic component (the maltose-binding protein or MalE), a pore-forming membrane protein (MalF and MalG) and a membrane-associated ATPase (MalK). In the present study, the structure determination of the apo form of the putative maltose/trehalose-binding protein (Xac-MalE) from the citrus pathogen Xanthomonas citri in space group P6522 is described. The crystals contained two protein molecules in the asymmetric unit and diffracted to 2.8 Å resolution. Xac-MalE conserves the structural and functional features of sugar-binding proteins and a ligand-binding pocket with similar characteristics to eight different orthologues, including the residues for maltose and trehalose interaction. This is the first structure of a sugar-binding protein from a phytopathogenic bacterium, which is highly conserved in all species from the Xanthomonas genus.


    Organizational Affiliation

    Department of Chemical and Physical Biology, Centro de Investigaciones Biologicas (CSIC), Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ABC transporter sugar binding protein
A, B
458Xanthomonas axonopodis pv. citri (strain 306)Mutation(s): 0 
Gene Names: malE
Find proteins for Q8PK66 (Xanthomonas axonopodis pv. citri (strain 306))
Go to UniProtKB:  Q8PK66
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.202 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.189 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 122.971α = 90.00
b = 122.971β = 90.00
c = 304.280γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
SHARPphasing
SCALAdata scaling
MxCuBEdata collection
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-14
    Type: Initial release
  • Version 1.1: 2014-05-14
    Type: Database references
  • Version 1.2: 2014-09-24
    Type: Database references
  • Version 1.3: 2017-11-08
    Type: Refinement description