1O53

Solution structure of the N-terminal membrane anchor of E. coli enzyme IIA(Glucose)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: No NOE violations greater than 0.20 A; rms difference for bond deviations from ideality less than 0.01 A; rms difference for angle deviations from ideality less than 2 degrees; Structures with the lowerest energies in the ensemble; Structures most resemble the average structure. 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the N-terminal amphitropic domain of Escherichia coli glucose-specific enzyme IIA in membrane-mimetic micelles

Wang, G.Keifer, P.A.Peterkofsky, A.

(2003) Protein Sci. 12: 1087-1096

  • DOI: 10.1110/ps.0301503

  • PubMed Abstract: 
  • The N-terminal domain of enzyme IIA(Glc) of the Escherichia coli phosphoenolpyruvate:sugar phosphotransferase system confers amphitropism to the protein, allowing IIA(Glc) to shuttle between the cytoplasm and the membrane. To further understand this ...

    The N-terminal domain of enzyme IIA(Glc) of the Escherichia coli phosphoenolpyruvate:sugar phosphotransferase system confers amphitropism to the protein, allowing IIA(Glc) to shuttle between the cytoplasm and the membrane. To further understand this amphitropic protein, we have elucidated, by NMR spectroscopy, the solution structure of a synthetic peptide corresponding to the N-terminal domain of IIA(Glc). In water, this peptide is predominantly disordered, consistent with previous data obtained in the absence of membranes. In detergent micelles of dihexanoylphosphatidylglycerol (DHPG) or sodium dodecylsulfate (SDS), however, residues Phe 3-Val 10 of the peptide adopt a helical conformation in the ensemble of structures calculated on the basis of NOE-derived distance restraints. The root mean square deviations for superimposing the backbone atoms of the helical region are 0.18 A in DHPG and 0.22 A in SDS. The structure, chemical shifts, and spin-spin coupling constants all indicate that, of the four lysines in the N-terminal domain of IIA(Glc), only Lys 5 and Lys 7 in the amphipathic helical region interact with DHPG. In addition, the peptide-detergent interactions were investigated using intermolecular NOESY experiments. The aliphatic chains of anionic detergents DHPG, SDS, and 2,2-dimethyl-2-silapentane-5-sulfonate sodium salt (DSS) all showed intermolecular NOE cross-peaks to the peptide, providing direct evidence for the putative membrane anchor of IIA(Glc) in binding to the membrane-mimicking micelles.


    Organizational Affiliation

    Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska 68198, USA. gwang@unmc.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PTS system, glucose-specific IIA component
A
15Salmonella typhiGene Names: crr
EC: 2.7.1.-
Find proteins for P0A284 (Salmonella typhi)
Go to UniProtKB:  P0A284
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: No NOE violations greater than 0.20 A; rms difference for bond deviations from ideality less than 0.01 A; rms difference for angle deviations from ideality less than 2 degrees; Structures with the lowerest energies in the ensemble; Structures most resemble the average structure. 
  • Olderado: 1O53 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-08-19
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance