2N5T

Ensemble solution structure of the phosphoenolpyruvate-Enzyme I complex from the bacterial phosphotransferase system


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 11 
  • Selection Criteria: structures with the lowest energy 

  • Method: SOLUTION SCATTERING

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Dynamic equilibrium between closed and partially closed states of the bacterial Enzyme I unveiled by solution NMR and X-ray scattering.

Venditti, V.Schwieters, C.D.Grishaev, A.Clore, G.M.

(2015) Proc Natl Acad Sci U S A 112: 11565-11570

  • DOI: https://doi.org/10.1073/pnas.1515366112
  • Primary Citation of Related Structures:  
    2N5T

  • PubMed Abstract: 

    Enzyme I (EI) is the first component in the bacterial phosphotransferase system, a signal transduction pathway in which phosphoryl transfer through a series of bimolecular protein-protein interactions is coupled to sugar transport across the membrane. EI is a multidomain, 128-kDa homodimer that has been shown to exist in two conformational states related to one another by two large (50-90°) rigid body domain reorientations. The open conformation of apo EI allows phosphoryl transfer from His189 located in the N-terminal domain α/β (EIN(α/β)) subdomain to the downstream protein partner bound to the EIN(α) subdomain. The closed conformation, observed in a trapped phosphoryl transfer intermediate, brings the EIN(α/β) subdomain into close proximity to the C-terminal dimerization domain (EIC), thereby permitting in-line phosphoryl transfer from phosphoenolpyruvate (PEP) bound to EIC to His189. Here, we investigate the solution conformation of a complex of an active site mutant of EI (H189A) with PEP. Simulated annealing refinement driven simultaneously by solution small angle X-ray scattering and NMR residual dipolar coupling data demonstrates unambiguously that the EI(H189A)-PEP complex exists in a dynamic equilibrium between two approximately equally populated conformational states, one corresponding to the closed structure and the other to a partially closed species. The latter likely represents an intermediate in the open-to-closed transition.


  • Organizational Affiliation

    Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520; Department of Chemistry, Iowa State University, Ames, IA 50011;


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphoenolpyruvate-protein phosphotransferase
A, B
575Escherichia coli K-12Mutation(s): 0 
Gene Names: ptsIb2416JW2409
EC: 2.7.3.9
UniProt
Find proteins for P08839 (Escherichia coli (strain K12))
Explore P08839 
Go to UniProtKB:  P08839
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08839
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 11 
  • Selection Criteria: structures with the lowest energy 
  • Method: SOLUTION SCATTERING

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-02
    Type: Initial release
  • Version 1.1: 2015-09-09
    Changes: Database references
  • Version 1.2: 2015-10-21
    Changes: Database references
  • Version 1.3: 2019-04-17
    Changes: Data collection, Experimental preparation, Refinement description, Structure summary
  • Version 1.4: 2024-05-01
    Changes: Data collection, Database references