1VSQ

Solution NMR structure of the productive complex between IIAMannose and IIBMannose of the mannose transporter of the E. coli phosphotransferase system


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 
  • Selection Criteria: restrained regularized mean 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution NMR Structures of Productive and Non-productive Complexes between the A and B Domains of the Cytoplasmic Subunit of the Mannose Transporter of the Escherichia coli Phosphotransferase System.

Hu, J.Hu, K.Williams, D.C.Komlosh, M.E.Cai, M.Clore, G.M.

(2008) J.Biol.Chem. 283: 11024-11037

  • DOI: 10.1074/jbc.M800312200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Solution structures of complexes between the isolated A (IIA(Man)) and B (IIB(Man)) domains of the cytoplasmic component of the mannose transporter of Escherichia coli have been solved by NMR. The complex of wild-type IIA(Man) and IIB(Man) is a mixtu ...

    Solution structures of complexes between the isolated A (IIA(Man)) and B (IIB(Man)) domains of the cytoplasmic component of the mannose transporter of Escherichia coli have been solved by NMR. The complex of wild-type IIA(Man) and IIB(Man) is a mixture of two species comprising a productive, phosphoryl transfer competent complex and a non-productive complex with the two active site histidines, His-10 of IIA(Man) and His-175 of IIB(Man), separated by approximately 25A. Mutation of the active site histidine, His-10, of IIA(Man) to a glutamate, to mimic phosphorylation, results in the formation of a single productive complex. The apparent equilibrium dissociation constants for the binding of both wild-type and H10E IIA(Man) to IIB(Man) are approximately the same (K(D) approximately 0.5 mM). The productive complex can readily accommodate a transition state involving a pentacoordinate phosphoryl group with trigonal bipyramidal geometry bonded to the Nepsilon2 atom of His-10 of IIA(Man) and the Ndelta1 atom of His-175 of IIB(Man) with negligible (<0.2A) local backbone conformational changes in the immediate vicinity of the active site. The non-productive complex is related to the productive one by a approximately 90 degrees rotation and approximately 37A translation of IIB(Man) relative to IIA(Man), leaving the active site His-175 of IIB(Man) fully exposed to solvent in the non-productive complex. The interaction surface on IIA(Man) for the non-productive complex comprises a subset of residues used in the productive complex and in both cases involves both subunits of IIA(Man). The selection of the productive complex by IIA(Man)(H10E) can be attributed to neutralization of the positively charged Arg-172 of IIB(Man) at the center of the interface. The non-productive IIA(Man)-IIB(Man) complex may possibly be relevant to subsequent phosphoryl transfer from His-175 of IIB(Man) to the incoming sugar located on the transmembrane IIC(Man)-IID(Man) complex.


    Organizational Affiliation

    Laboratory of Chemical Physics, NIDDK, National Institutes of Health, Bethesda, Maryland 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mannose-specific phosphotransferase enzyme IIA component
A, B
133Escherichia 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
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Mannose-specific phosphotransferase enzyme IIB component
C
165Escherichia 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
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NEP
Query on NEP
A, B
L-PEPTIDE LINKINGC6 H10 N3 O5 PHIS
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 
  • Selection Criteria: restrained regularized mean 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-02-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-07-17
    Type: Derived calculations
  • Version 1.3: 2018-10-03
    Type: Advisory, Data collection, Experimental preparation, Refinement description, Source and taxonomy, Structure summary