3EZ8

Crystal Structure of endoglucanase Cel9A from the thermoacidophilic Alicyclobacillus acidocaldarius


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.302 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 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.,Sect.D 65: 744-750

  • DOI: 10.1107/S0907444909012773

  • 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 t ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cellulase
A
537Alicyclobacillus acidocaldariusMutation(s): 0 
Gene Names: celA
EC: 3.2.1.4
Find proteins for Q9AJS0 (Alicyclobacillus acidocaldarius)
Go to UniProtKB:  Q9AJS0
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.302 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.197 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.059α = 90.00
b = 84.967β = 90.00
c = 129.479γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance