1PDO

PHOSPHOENOLPYRUVATE-DEPENDENT PHOSPHOTRANSFERASE SYSTEM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the IIA domain of the mannose transporter from Escherichia coli at 1.7 angstroms resolution.

Nunn, R.S.Markovic-Housley, Z.Genovesio-Taverne, J.C.Flukiger, K.Rizkallah, P.J.Jansonius, J.N.Schirmer, T.Erni, B.

(1996) J.Mol.Biol. 259: 502-511


  • PubMed Abstract: 
  • The mannose transporter from Escherichia coli is a member of the phosphoenolpyruvate-dependent phosphotransferase system. The multi-subunit complex couples translocation across the bacterial inner membrane with phosphorylation of the solute. A functi ...

    The mannose transporter from Escherichia coli is a member of the phosphoenolpyruvate-dependent phosphotransferase system. The multi-subunit complex couples translocation across the bacterial inner membrane with phosphorylation of the solute. A functional fragment (IIA(Man), residues 2 to 133) of the membrane-associated IIAB(Man) subunit of the mannose transporter was expressed as a selenomethionine protein, and the unphosphorylated molecule was crystallized and its structure solved by X-ray crystallography. The protein consists of a central five-stranded beta-sheet covered by helices on either face. The order of the secondary structure elements is (beta alpha)4, alpha beta. Four beta-strands are arranged in a parallel manner with strand order 2134 and are linked by helices forming right-handed cross-over connections. The fifth strand that forms one edge of the sheet and runs antiparallel to the others is swapped between the subunits of the dimeric structure. Helices D and E form a helical hairpin. Histidine 10, which is transiently phosphorylated during catalysis, is located at the topological switch-point of the structure, close to the subunit interface. Its imidazole ring is hydrogen bonded to the buried side-chain of Asp67. It is likely that Asp67 acts as a general base and thus increases the nucleophilicity of the histidine. Modeling suggests that the covalently bound phosphoryl group would be stabilized by the macrodipole of helix C. Putative interactions between IIA(Man) and the histidine-containing phosphocarrier protein are discussed.


    Related Citations: 
    • The Mannose Permease of Escherichia Coli Consists of Three Different Proteins. Amino Acid Sequence and Function in Sugar Transport, Sugar Phosphorylation, and Penetration of Phage Lambda DNA
      Erni, B.,Zanolari, B.,Kocher, H.P.
      (1987) J.Biol.Chem. 262: 5238


    Organizational Affiliation

    Biozentrum, Abteilung Strukturbiologie, University of Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MANNOSE PERMEASE
A
135Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: manX (gptB, ptsL)
EC: 2.7.1.191
Find proteins for P69797 (Escherichia coli (strain K12))
Go to UniProtKB:  P69797
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.189 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 76.360α = 90.00
b = 76.360β = 90.00
c = 88.730γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
CCP4data scaling
MOSFLMdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-08-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance