1DAQ

SOLUTION STRUCTURE OF THE TYPE I DOCKERIN DOMAIN FROM THE CLOSTRIDIUM THERMOCELLUM CELLULOSOME (MINIMIZED AVERAGE STRUCTURE)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Solution structure of a type I dockerin domain, a novel prokaryotic, extracellular calcium-binding domain.

Lytle, B.L.Volkman, B.F.Westler, W.M.Heckman, M.P.Wu, J.H.

(2001) J Mol Biol 307: 745-753

  • DOI: 10.1006/jmbi.2001.4522
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The type I dockerin domain is responsible for incorporating its associated glycosyl hydrolase into the bacterial cellulosome, a multienzyme cellulolytic complex, via its interaction with a receptor domain (cohesin domain) of the cellulosomal scaffold ...

    The type I dockerin domain is responsible for incorporating its associated glycosyl hydrolase into the bacterial cellulosome, a multienzyme cellulolytic complex, via its interaction with a receptor domain (cohesin domain) of the cellulosomal scaffolding subunit. The highly conserved dockerin domain is characterized by two Ca(2+)-binding sites with sequence similarity to the EF-hand motif. Here, we present the three-dimensional solution structure of the 69 residue dockerin domain of Clostridium thermocellum cellobiohydrolase CelS. Torsion angle dynamics calculations utilizing a total of 728 NOE-derived distance constraints and 79 torsion angle restraints yielded an ensemble of 20 structures with an average backbone r.m.s.d. for residues 5 to 29 and 32 to 66 of 0.54 A from the mean structure. The structure consists of two Ca(2+)-binding loop-helix motifs connected by a linker; the E helices entering each loop of the classical EF-hand motif are absent from the dockerin domain. Each dockerin Ca(2+)-binding subdomain is stabilized by a cluster of buried hydrophobic side-chains. Structural comparisons reveal that, in its non-complexed state, the dockerin fold displays a dramatic departure from that of Ca(2+)-bound EF-hand domains. A putative cohesin-binding surface, comprised of conserved hydrophobic and basic residues, is proposed, providing new insight into cellulosome assembly.


    Related Citations: 
    • Secondary Structure and Calcium-induced Folding of the Clostridium thermocellum Dockerin Domain Determined by NMR Spectroscopy
      Lytle, B.L., Volkman, B.F., Westler, W.M., Wu, J.H.D.
      (2000) Arch Biochem Biophys 379: 237
    • Involvement of Both Dockerin Subdomains in Assembly of the Clostridium thermocellum Cellulosome
      Lytle, B., Wu, J.H.D.
      (1998) J Bacteriol 180: 6581

    Organizational Affiliation

    Department of Chemical Engineering, University of Rochester, NY 14627-0166, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENDOGLUCANASE SSA71Hungateiclostridium thermocellumMutation(s): 2 
Gene Names: celS
EC: 3.2.1.4 (PDB Primary Data), 3.2.1.176 (UniProt)
Find proteins for P0C2S5 (Hungateiclostridium thermocellum)
Explore P0C2S5 
Go to UniProtKB:  P0C2S5
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1DAQ Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-04-04
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance