1H1N

Atomic resolution structure of the major endoglucanase from Thermoascus aurantiacus

• PDB DOI: https://doi.org/10.2210/pdb1H1N/pdb

• Classification: HYDROLASE
• Organism(s): Thermoascus aurantiacus
• Mutation(s): No 


• Deposited: 2002-07-19 Released: 2002-08-12 
• Deposition Author(s): Van Petegem, F., Vandenberghe, I., Bhat, M.K., Van Beeumen, J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.12 Å
• R-Value Free: 0.171 
• R-Value Observed: 0.144 

Literature

Atomic Resolution Structure of the Major Endoglucanase from Thermoascus Aurantiacus

Van Petegem, F., Vandenberghe, I., Bhat, M.K., Van Beeumen, J.

(2002) Biochem Biophys Res Commun 296: 161

• PubMed: 12147244 
• DOI: https://doi.org/10.1016/s0006-291x(02)00775-1
• Primary Citation of Related Structures:  
  1H1N


• PubMed Abstract: 
  

  The crystal structure of the major endoglucanase from the thermophilic fungus Thermoascus aurantiacus was determined by single isomorphous replacement at 1.12A resolution. The full sequence supports the classification of the protein in a subgroup of glycoside hydrolase family 5 for which no structural data are available yet. The active site shows eight critical residues, strictly conserved within family 5. In addition, aromatic residues that line the substrate-binding cleft and that are possibly involved in substrate-binding are identified. A number of residues seem to be conserved among members of the subtype, including a disulphide bridge between Cys212 and Cys249.

---

Organizational Affiliation: 

Laboratorium voor Eiwitbiochemie en Eiwitengineering, Universiteit Gent, B-9000, Gent, Belgium.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PQS (software)

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 67.46 kDa 
• Atom Count: 5,739 
• Modelled Residue Count: 609 
• Deposited Residue Count: 610 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ENDO TYPE CELLULASE ENGI	A, B	305	Thermoascus aurantiacus	Mutation(s): 0  EC: 3.2.1.4
UniProt
Find proteins for Q8TG26 (Thermoascus aurantiacus) Explore Q8TG26  Go to UniProtKB:  Q8TG26

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.12 Å
• R-Value Free: 0.171 
• R-Value Observed: 0.144 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.764	α = 90
b = 84.728	β = 90
c = 89.099	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MLPHARE	phasing
ARP/wARP	phasing
SHELXL-97	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-08-12 
Deposition Author(s): Van Petegem, F., Vandenberghe, I., Bhat, M.K., Van Beeumen, J.

Revision History  

• Version 1.0: 2002-08-12
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-06-28
  Changes: Refinement description
• Version 1.4: 2019-05-22
  Changes: Data collection, Refinement description
• Version 1.5: 2019-07-24
  Changes: Data collection
• Version 1.6: 2024-11-06
  Changes: Data collection, Database references, Other, Structure summary