1O2F

COMPLEX OF ENZYME IIAGLC AND IIBGLC PHOSPHOCARRIER PROTEIN HPR FROM ESCHERICHIA COLI NMR, RESTRAINED REGULARIZED MEAN STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 
  • Selection Criteria: REGULARIZED MEAN STRUCTURES 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution Structure of the Phosphoryl Transfer Complex between the Signal-transducing Protein IIAGlucose and the Cytoplasmic Domain of the Glucose Transporter IICBGlucose of the Escherichia coli Glucose Phosphotransferase System.

Cai, M.Williams Jr., D.C.Wang, G.Lee, B.R.Peterkofsky, A.Clore, G.M.

(2003) J.Biol.Chem. 278: 25191-25206

  • DOI: 10.1074/jbc.M302677200

  • PubMed Abstract: 
  • The solution structure of the final phosphoryl transfer complex in the glucose-specific arm of the Escherichia coli phosphotransferase system, between enzyme IIAGlucose (IIAGlc) and the cytoplasmic B domain (IIBGlc) of the glucose transporter IICBGlc ...

    The solution structure of the final phosphoryl transfer complex in the glucose-specific arm of the Escherichia coli phosphotransferase system, between enzyme IIAGlucose (IIAGlc) and the cytoplasmic B domain (IIBGlc) of the glucose transporter IICBGlc, has been solved by NMR. The interface (approximately 1200-A2 buried surface) is formed by the interaction of a concave depression on IIAGlc with a convex protrusion on IIBGlc. The phosphoryl donor and acceptor residues, His-90 of IIAGlc and Cys-35 of IIBGlc (residues of IIBGlc are denoted in italics) are in close proximity and buried at the center of the interface. Cys-35 is primed for nucleophilic attack on the phosphorus atom by stabilization of the thiolate anion (pKa approximately 6.5) through intramolecular hydrogen bonding interactions with several adjacent backbone amide groups. Hydrophobic intermolecular contacts are supplemented by peripheral electrostatic interactions involving an alternating distribution of positively and negatively charged residues on the interaction surfaces of both proteins. Salt bridges between the Asp-38/Asp-94 pair of IIAGlc and the Arg-38/Arg-40 pair of IIBGlc neutralize the accumulation of negative charge in the vicinity of both the Sgamma atom of Cys-35 and the phosphoryl group in the complex. A pentacoordinate phosphoryl transition state is readily accommodated without any change in backbone conformation, and the structure of the complex accounts for the preferred directionality of phosphoryl transfer between IIAGlc and IIBGlc. The structures of IIAGlc.IIBGlc and the two upstream complexes of the glucose phosphotransferase system (EI.HPr and IIAGlc.HPr) reveal a cascade in which highly overlapping binding sites on HPr and IIAGlc recognize structurally diverse proteins.


    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
PTS system, glucose-specific IIA component
A
168Escherichia coli (strain K12)Gene Names: crr (gsr, iex, tgs, treD)
EC: 2.7.1.-
Find proteins for P69783 (Escherichia coli (strain K12))
Go to UniProtKB:  P69783
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PTS system, glucose-specific IIBC component
B
90Escherichia coli (strain K12)Gene Names: ptsG (glcA, umg)
EC: 2.7.1.194, 2.7.1.191, 2.7.1.192, 2.7.1.195, 2.7.1.193
Find proteins for P69786 (Escherichia coli (strain K12))
Go to UniProtKB:  P69786
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 
  • Selection Criteria: REGULARIZED MEAN STRUCTURES 
  • Olderado: 1O2F Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-05-13
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance