1E2B

NMR STRUCTURE OF THE C10S MUTANT OF ENZYME IIB CELLOBIOSE OF THE PHOSPHOENOL-PYRUVATE DEPENDENT PHOSPHOTRANSFERASE SYSTEM OF ESCHERICHIA COLI, 17 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 32 
  • Conformers Submitted: 17 
  • Selection Criteria: TARGET FUNCTION, NUMBER OF VIOLATIONS 

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This is version 1.4 of the entry. See complete history


Literature

The NMR side-chain assignments and solution structure of enzyme IIBcellobiose of the phosphoenolpyruvate-dependent phosphotransferase system of Escherichia coli.

Ab, E.Schuurman-Wolters, G.Reizer, J.Saier, M.H.Dijkstra, K.Scheek, R.M.Robillard, G.T.

(1997) Protein Sci 6: 304-314

  • DOI: https://doi.org/10.1002/pro.5560060205
  • Primary Citation of Related Structures:  
    1E2B

  • PubMed Abstract: 

    The assignment of the side-chain NMR resonances and the determination of the three-dimensional solution structure of the C10S mutant of enzyme IIBcellobiose (IIBcel) of the phosphoenolpyruvate-dependent phosphotransferase system of Escherichia coli are presented. The side-chain resonances were assigned nearly completely using a variety of mostly heteronuclear NMR experiments, including HCCH-TOCSY, HCCH-COSY, and COCCH-TOCSY experiments as well as CBCACOHA, CBCA(CO)NH, and HBHA(CBCA)(CO)NH experiments. In order to obtain the three-dimensional structure, NOE data were collected from 15N-NOESY-HSQC, 13C-HSQC-NOESY, and 2D NOE experiments. The distance restraints derived from these NOE data were used in distance geometry calculations followed by molecular dynamics and simulated annealing protocols. In an iterative procedure, additional NOE assignments were derived from the calculated structures and new structures were calculated. The final set of structures, calculated with approximately 2000 unambiguous and ambiguous distance restraints, has an rms deviation of 1.1 A on C alpha atoms. IIBcel consists of a four stranded parallel beta-sheet, in the order 2134. The sheet is flanked with two and three alpha-helices on either side. Residue 10, a cysteine in the wild-type enzyme, which is phosphorylated during the catalytic cycle, is located at the end of the first beta-strand. A loop that is proposed to be involved in the binding of the phosphoryl-group follows the cysteine. The loop appears to be disordered in the unphosphorylated state.


  • Organizational Affiliation

    Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, The Netherlands.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ENZYME IIB-CELLOBIOSE106Escherichia coli K-12Mutation(s): 1 
Gene Names: CELA
EC: 2.7.1.69
UniProt
Find proteins for P69795 (Escherichia coli (strain K12))
Explore P69795 
Go to UniProtKB:  P69795
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69795
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 32 
  • Conformers Submitted: 17 
  • Selection Criteria: TARGET FUNCTION, NUMBER OF VIOLATIONS 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-07-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Database references, Other
  • Version 1.4: 2024-05-22
    Changes: Data collection