2OQ3

Solution Structure of the mannitol- specific cryptic phosphotransferase enzyme IIA CmtB from Escherichia coli


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Solution structure of the cryptic mannitol-specific phosphotransferase enzyme IIA CmtB from Escherichia coli

Yu, C.Li, Y.Xia, B.Jin, C.

(2007) Biochem.Biophys.Res.Commun. 362: 1001-1006

  • DOI: 10.1016/j.bbrc.2007.08.102

  • PubMed Abstract: 
  • The bacterial phosphoenolpyruvate-dependent sugar phosphotransferase system (PEP-PTS) is essential in the coupled transportation and phosphorylation of various types of carbohydrates. The CmtAB proteins of Escherichia coli are sequentially similar to ...

    The bacterial phosphoenolpyruvate-dependent sugar phosphotransferase system (PEP-PTS) is essential in the coupled transportation and phosphorylation of various types of carbohydrates. The CmtAB proteins of Escherichia coli are sequentially similar to the mannitol-specific phosphotransferase MtlA. The CmtB protein corresponds to the phosphotransferase enzyme IIA component. Here we report the solution structure of CmtB from E. coli at high resolution by NMR spectroscopy. The results show that CmtB adopts a globular fold consisting of a central mixed five-strand beta-sheet flanked by seven helices at both sides. Structural comparison with the IIA domain of MtlA (IIAMtl) reveals high overall similarity, while notable conformational differences at the active site are observed. The active site pocket of CmtB appears to be wider, and the hydrophobic regions around it is larger compared to IIAMtl. Further, the essential arginine residue at the active site of IIAMtl is substituted by a serine in CmtB. Instead, the active pocket of CmtB contains another arginine at a distinct position, suggesting different molecular mechanisms for phosphoryl transfer.


    Organizational Affiliation

    Beijing Nuclear Magnetic Resonance Center, Peking University, Beijing 100871, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mannitol-specific cryptic phosphotransferase enzyme IIA component
A
150Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: cmtB
Find proteins for P69824 (Escherichia coli (strain K12))
Go to UniProtKB:  P69824
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2OQ3 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-01-31 
  • Released Date: 2007-09-25 
  • Deposition Author(s): Jin, C., Yu, C.

Revision History 

  • Version 1.0: 2007-09-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance