3B7M

Crystal structure of a meso-active thermo-stable cellulase (MT Cel12A) derived by making non-contiguous mutations in the active surface of the Cel12A cellulase of Rhodothermus marinus

• PDB DOI: https://doi.org/10.2210/pdb3B7M/pdb

• Classification: HYDROLASE
• Organism(s): Rhodothermus marinus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-10-31 Released: 2007-11-27 
• Deposition Author(s): Karthikeyan, S., Guptasarma, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.238 
• R-Value Work: 0.186 
• R-Value Observed: 0.189 

Literature

Transplantation of the active surface of a mesophile cellulase onto the structural scaffold of a homologous thermophile cellulase through engineering of a surface beta sheet

Kapoor, D., Kumar, V., Chandrayan, S.K., Ahmed, S., Sharma, S., Datt, M., Singh, B., Karthikeyan, S., Guptasarma, P.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors.

Biological Assembly 5  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 5 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 95.09 kDa 
• Atom Count: 7,062 
• Modelled Residue Count: 864 
• Deposited Residue Count: 864 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CELLULASE	A, B, C, D	216	Rhodothermus marinus	Mutation(s): 0  Gene Names: celA EC: 3.2.1.4
UniProt
Find proteins for O33897 (Rhodothermus marinus) Explore O33897  Go to UniProtKB:  O33897

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.238 
• R-Value Work: 0.186 
• R-Value Observed: 0.189 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.398	α = 90
b = 111.874	β = 90
c = 133.707	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MAR345	data collection
AUTOMAR	data reduction
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-11-27 
Deposition Author(s): Karthikeyan, S., Guptasarma, P.

Revision History  

• Version 1.0: 2007-11-27
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-10-25
  Changes: Refinement description
• Version 1.3: 2023-11-01
  Changes: Data collection, Database references, Refinement description