3PDG

Structures of Clostridium thermocellum CbhA fibronectin(III)-like modules


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and function of the Clostridium thermocellum cellobiohydrolase A X1-module repeat: enhancement through stabilization of the CbhA complex.

Brunecky, R.Alahuhta, M.Bomble, Y.J.Xu, Q.Baker, J.O.Ding, S.Y.Himmel, M.E.Lunin, V.V.

(2012) Acta Crystallogr.,Sect.D 68: 292-299

  • DOI: 10.1107/S0907444912001680
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The efficient deconstruction of lignocellulosic biomass remains a significant barrier to the commercialization of biofuels. Whereas most commercial plant cell-wall-degrading enzyme preparations used today are derived from fungi, the cellulosomal enzy ...

    The efficient deconstruction of lignocellulosic biomass remains a significant barrier to the commercialization of biofuels. Whereas most commercial plant cell-wall-degrading enzyme preparations used today are derived from fungi, the cellulosomal enzyme system from Clostridium thermocellum is an equally effective catalyst, yet of considerably different structure. A key difference between fungal enzyme systems and cellulosomal enzyme systems is that cellulosomal enzyme systems utilize self-assembled scaffolded multimodule enzymes to deconstruct biomass. Here, the possible function of the X1 modules in the complex multimodular enzyme system cellobiohydrolase A (CbhA) from C. thermocellum is explored. The crystal structures of the two X1 modules from C. thermocellum CbhA have been solved individually and together as one construct. The role that calcium may play in the stability of the X1 modules has also been investigated, as well as the possibility that they interact with each other. Furthermore, the results show that whereas the X1 modules do not seem to act as cellulose disruptors, they do aid in the thermostability of the CbhA complex, effectively allowing it to deconstruct cellulose at a higher temperature.


    Organizational Affiliation

    Biosciences Center, National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fibronectin(III)-like module
A
98Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)Mutation(s): 0 
EC: 3.2.1.-
Find proteins for A3DCH2 (Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372))
Go to UniProtKB:  A3DCH2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.230 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 42.316α = 90.00
b = 42.316β = 90.00
c = 116.756γ = 90.00
Software Package:
Software NamePurpose
SAINTdata reduction
PROTEUM PLUSdata scaling
REFMACrefinement
SHELXmodel building
SHELXphasing
PROTEUM PLUSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-23
    Type: Initial release
  • Version 1.1: 2012-05-09
    Type: Database references