3UOR

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

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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 Sect F Struct Biol Cryst Commun 70: 564-571

  • DOI: 10.1107/S2053230X14006578
  • Primary Citation of Related Structures:  
    3UOR

  • 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

    Departamento de Microbiologia, Instituto de Ciências Biomédicas II, Universidade de São Paulo, Cidade Universitária, SP, Brazil.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ABC transporter sugar binding proteinAB458Xanthomonas citri pv. citri str. 306Mutation(s): 0 
Gene Names: malEXAC2310
Find proteins for Q8PK66 (Xanthomonas axonopodis pv. citri (strain 306))
Explore Q8PK66 
Go to UniProtKB:  Q8PK66
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.971α = 90
b = 122.971β = 90
c = 304.28γ = 120
Software Package:
Software NamePurpose
MxCuBEdata collection
SHARPphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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