Proteases from Pseudoalteromonas arctica PAMC 21717 (Pro21717)

Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.130 
  • R-Value Observed: 0.131 

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Crystal structure of a cold-active protease (Pro21717) from the psychrophilic bacterium, Pseudoalteromonas arctica PAMC 21717, at 1.4 angstrom resolution: Structural adaptations to cold and functional analysis of a laundry detergent enzyme

Park, H.J.Lee, C.W.Kim, D.Do, H.Han, S.J.Kim, J.E.Koo, B.H.Lee, J.H.Yim, J.H.

(2018) PLoS One 13: e0191740-e0191740

  • DOI: https://doi.org/10.1371/journal.pone.0191740
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Enzymes isolated from organisms found in cold habitats generally exhibit higher catalytic activity at low temperatures than their mesophilic homologs and are therefore known as cold-active enzymes. Cold-active proteases are very useful in a variety of biotechnological applications, particularly as active ingredients in laundry and dishwashing detergents, where they provide strong protein-degrading activity in cold water. We identified a cold-active protease (Pro21717) from a psychrophilic bacterium, Pseudoalteromonas arctica PAMC 21717, and determined the crystal structure of its catalytic domain (CD) at a resolution of 1.4 Å. The Pro21717-CD structure shows a conserved subtilisin-like fold with a typical catalytic triad (Asp185, His244, and Ser425) and contains four calcium ions and three disulfide bonds. Interestingly, we observed an unexpected electron density at the substrate-binding site from a co-purified peptide. Although the sequence of this peptide is unknown, analysis of the peptide-complexed structure nonetheless provides some indication of the substrate recognition and binding mode of Pro21717. Moreover, various parameters, including a wide substrate pocket size, an abundant active-site loop content, and a flexible structure provide potential explanations for the cold-adapted properties of Pro21717. In conclusion, this is first structural characterization of a cold-adapted subtilisin-like protease, and these findings provide a structural and functional basis for industrial applications of Pro21717 as a cold-active laundry or dishwashing detergent enzyme.

  • Organizational Affiliation

    Division of Polar Life Sciences, Korea Polar Research Institute, Incheon, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pseudoalteromonas arctica PAMC 21717347Pseudoalteromonas arcticaMutation(s): 0 
Find proteins for A0A290S6P3 (Pseudoalteromonas arctica A 37-1-2)
Explore A0A290S6P3 
Go to UniProtKB:  A0A290S6P3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A290S6P3
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Copurified unknown peptide3Pseudoalteromonas arcticaMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.130 
  • R-Value Observed: 0.131 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.948α = 90
b = 74.562β = 90
c = 83.012γ = 90
Software Package:
Software NamePurpose
HKL-2000data processing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-31
    Type: Initial release
  • Version 1.1: 2018-09-12
    Changes: Data collection, Database references