1CX1

SECOND N-TERMINAL CELLULOSE-BINDING DOMAIN FROM CELLULOMONAS FIMI BETA-1,4-GLUCANASE C, NMR, 22 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 22 
  • Selection Criteria: STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY,STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS,STRUCTURES WITH THE LOWEST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure and binding specificity of the second N-terminal cellulose-binding domain from Cellulomonas fimi endoglucanase C.

Brun, E.Johnson, P.E.Creagh, A.L.Tomme, P.Webster, P.Haynes, C.A.McIntosh, L.P.

(2000) Biochemistry 39: 2445-2458


  • PubMed Abstract: 
  • The 1,4-beta-glucanase CenC from Cellulomonas fimi contains two cellulose-binding domains, CBD(N1) and CBD(N2), arranged in tandem at its N-terminus. These homologous CBDs are distinct in their selectivity for binding amorphous and not crystalline ce ...

    The 1,4-beta-glucanase CenC from Cellulomonas fimi contains two cellulose-binding domains, CBD(N1) and CBD(N2), arranged in tandem at its N-terminus. These homologous CBDs are distinct in their selectivity for binding amorphous and not crystalline cellulose. Multidimensional heteronuclear nuclear magnetic resonance (NMR) spectroscopy was used to determine the tertiary structure of CBD(N2) in the presence of saturating amounts of cellopentaose. A total of 1996 experimental restraints were used to calculate an ensemble of 21 final structures for the protein. CBD(Nu2) is composed of 11 beta-strands, folded into two antiparallel beta-sheets, with a topology of a jellyroll beta-sandwich. On the basis of patterns of chemical shift perturbations accompanying the addition of cellooligosaccharides, as well as the observation of intermolecular protein-sugar NOE interactions, the cellulose-binding site of CBD(N2) was identified as a cleft that lies across one face of the beta-sandwich. The thermodynamic basis for the binding of cellooligosaccharides was investigated using isothermal titration calorimetry and NMR spectroscopy. Binding is enthalpically driven and consistent with a structural model involving hydrogen bonding between the equatorial hydroxyls of the glucopyranosyl rings and polar amino acid side chains lining the CBD(N2) cleft. Affinity electrophoresis was used to determine that CBD(N2) also binds soluble beta-1,4-linked polymers of glucose, including hydroxyethylcellulose and beta-1,3-1,4-glucans. This study complements a previous analysis of CBD(N1) [Johnson, P. E., Joshi, M. D., Tomme, P., Kilburn, D. G., and McIntosh, L. P. (1996) Biochemistry 35, 14381-14394] and demonstrates that the homologous CBDs from CenC share very similar structures and sugar binding properties.


    Related Citations: 
    • The cellulose-binding domains from Cellulomonas fimi beta-1, 4-glucanase CenC bind nitroxide spin-labeled cellooligosaccharides in multiple orientations
      Brun, E.,Johnson, P.E.,MacKenzie, L.,Withers, S.G.,McIntosh, L.P.
      (1999) J.Mol.Biol. 287: 609
    • Structure of the N-terminal Cellulose-Binding Domain of Cellulomonas Fimi CenC Determined by Nucelar Magnetic Resonance Spectroscopy
      Johnson, P.E.,Joshi, M.D.,Tomme, P.,Kilburn, D.G.,McIntosh, L.P.
      (1997) Biochemistry 35: 14381


    Organizational Affiliation

    Protein Engineering Network of Centres of Excellence, Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENDOGLUCANASE C
A
153Cellulomonas fimi (strain ATCC 484 / DSM 20113 / JCM 1341 / NBRC 15513 / NCIMB 8980 / NCTC 7547)Mutation(s): 0 
Gene Names: cenC
EC: 3.2.1.4
Find proteins for P14090 (Cellulomonas fimi (strain ATCC 484 / DSM 20113 / JCM 1341 / NBRC 15513 / NCIMB 8980 / NCTC 7547))
Go to UniProtKB:  P14090
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 22 
  • Selection Criteria: STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY,STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS,STRUCTURES WITH THE LOWEST ENERGY 
  • Olderado: 1CX1 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-01
    Type: Structure summary