3EZ8

Crystal Structure of endoglucanase Cel9A from the thermoacidophilic Alicyclobacillus acidocaldarius


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structure of endoglucanase Cel9A from the thermoacidophilic Alicyclobacillus acidocaldarius

Pereira, J.H.Sapra, R.Volponi, J.V.Kozina, C.L.Simmons, B.Adams, P.D.

(2009) Acta Crystallogr D Biol Crystallogr 65: 744-750

  • DOI: https://doi.org/10.1107/S0907444909012773
  • Primary Citation of Related Structures:  
    3EZ8

  • PubMed Abstract: 

    The production of biofuels using biomass is an alternative route to support the growing global demand for energy and to also reduce the environmental problems caused by the burning of fossil fuels. Cellulases are likely to play an important role in the degradation of biomass and the production of sugars for subsequent fermentation to fuel. Here, the crystal structure of an endoglucanase, Cel9A, from Alicyclobacillus acidocaldarius (Aa_Cel9A) is reported which displays a modular architecture composed of an N-terminal Ig-like domain connected to the catalytic domain. This paper describes the overall structure and the detailed contacts between the two modules. Analysis suggests that the interaction involving the residues Gln13 (from the Ig-like module) and Phe439 (from the catalytic module) is important in maintaining the correct conformation of the catalytic module required for protein activity. Moreover, the Aa_Cel9A structure shows three metal-binding sites that are associated with the thermostability and/or substrate affinity of the enzyme.


  • Organizational Affiliation

    Joint BioEnergy Institute, Emeryville, CA 94608, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cellulase537Alicyclobacillus acidocaldarius subsp. acidocaldariusMutation(s): 0 
Gene Names: celA
EC: 3.2.1.4
UniProt
Find proteins for Q9AJS0 (Alicyclobacillus acidocaldarius subsp. acidocaldarius)
Explore Q9AJS0 
Go to UniProtKB:  Q9AJS0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9AJS0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.059α = 90
b = 84.967β = 90
c = 129.479γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-08-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description