5H4U

Crystal structure of cellulase from Antarctic springtail, Cryptopygus antarcticus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Genetic and Structural Characterization of a Thermo-Tolerant, Cold-Active, and Acidic Endo-beta-1,4-glucanase from Antarctic Springtail, Cryptopygus antarcticus.

Song, J.M.Hong, S.K.An, Y.J.Kang, M.H.Hong, K.H.Lee, Y.H.Cha, S.S.

(2017) J. Agric. Food Chem. 65: 1630-1640

  • DOI: 10.1021/acs.jafc.6b05037

  • PubMed Abstract: 
  • The CaCel gene from Antarctic springtail Cryptopygus antarcticus codes for a cellulase belonging to the glycosyl hydrolase family 45 (GHF45). Phylogenetic, biochemical, and structural analyses revealed that the CaCel gene product (CaCel) is closely r ...

    The CaCel gene from Antarctic springtail Cryptopygus antarcticus codes for a cellulase belonging to the glycosyl hydrolase family 45 (GHF45). Phylogenetic, biochemical, and structural analyses revealed that the CaCel gene product (CaCel) is closely related to fungal GHF45 endo-β-1,4-glucanases. The organization of five introns within the open reading frame of the CaCel gene indicates its endogenous origin in the genome of the species, which suggests the horizontal transfer of the gene from fungi to the springtail. CaCel exhibited optimal activity at pH 3.5, retained 80% of its activity at 0-10 °C, and maintained a half-life of 4 h at 70 °C. Based on the structural comparison between CaCel and a fungal homologue, we deduced the structural basis for the unusual characteristics of CaCel. Under acidic conditions at 50 °C, CaCel was effective to digest the green algae (Ulva pertusa), suggesting that it could be exploited for biofuel production from seaweeds.


    Organizational Affiliation

    Korea Institute of Ocean Science and Technology , 787 Haean-Ro, Sangnok-Gu, Ansan 426-744, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endo-beta-1,4-glucanase
A, B, C
231Cryptopygus antarcticusMutation(s): 0 
Find proteins for D3GDK4 (Cryptopygus antarcticus)
Go to UniProtKB:  D3GDK4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.219 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 81.714α = 90.00
b = 81.714β = 90.00
c = 89.352γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data processing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-03-22
    Type: Initial release