1L8F | pdb_00001l8f

Structure of 20K-endoglucanase from Melanocarpus albomyces at 1.8 A

• PDB DOI: https://doi.org/10.2210/pdb1L8F/pdb

• Classification: HYDROLASE
• Organism(s): Melanocarpus albomyces
• Mutation(s): No 


• Deposited: 2002-03-20 Released: 2003-04-01 
• Deposition Author(s): Valjakka, J., Rouvinen, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.257 (Depositor), 0.251 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.196 (DCC) 

Literature

Structure of 20K endoglucanase from Melanocarpus albomyces at 1.8 A resolution.

Valjakka, J., Rouvinen, J.

(2003) Acta Crystallogr D Biol Crystallogr 59: 765-768

• PubMed: 12657806 
• DOI: https://doi.org/10.1107/s0907444903002051
• Primary Citation Related Structures: 
  1L8F


• PubMed Abstract: 
  

  The crystal structure of the 20K endoglucanase from the thermophilic fungus Melanocarpus albomyces (Ma20k) has been determined. The structure was refined to 1.8 A resolution using data obtained at 120 K. Ma20k belongs to glycoside hydrolase family 45. The three-dimensional structures of endoglucanase V (EGV) from the fungus Humicola insolens and of an endoglucanase from H. grisea var. thermoidea have previously been determined. The overall structure of Ma20k consists of a six-stranded beta-barrel domain similar to that found previously in family 45 endoglucanases. The flexible loop between strands V and VI, which was disordered in the uncomplexed structures of the Humicola endoglucanases but was ordered in complexed structures of EGV, is found to be well ordered in the native structure of Ma20k. The structure of Ma20k allows comparison between thermophilic and mesophilic proteins of family 45 and different principles for thermostability are discussed.

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Organizational Affiliation: 
• Department of Chemistry, University of Joensuu, Finland. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 22.23 kDa 
• Atom Count: 1,774 
• Modeled Residue Count: 207 
• Deposited Residue Count: 207 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Endoglucanase	A	207	Melanocarpus albomyces	Mutation(s): 0  EC: 3.2.1.4
UniProt
Find proteins for Q8J0K8 (Melanocarpus albomyces) Explore Q8J0K8  Go to UniProtKB:  Q8J0K8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.257 (Depositor), 0.251 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.196 (DCC) 

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.44	α = 90
b = 47.44	β = 90
c = 156.81	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-04-01 
Deposition Author(s): Valjakka, J., Rouvinen, J.

Revision History  

• Version 1.0: 2003-04-01
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-04-04
  Changes: Data collection
• Version 1.4: 2024-10-16
  Changes: Data collection, Database references, Structure summary