Crystal structure of a cold adapted subtilisin-like serine proteinase

Experimental Data Snapshot

  • Resolution: 2.44 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.184 

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Crystal structure of a subtilisin-like serine proteinase from a psychrotrophic Vibrio species reveals structural aspects of cold adaptation.

Arnorsdottir, J.Kristjansson, M.M.Ficner, R.

(2005) FEBS J 272: 832-845

  • DOI: https://doi.org/10.1111/j.1742-4658.2005.04523.x
  • Primary Citation of Related Structures:  
    1S2N, 1SH7

  • PubMed Abstract: 

    The crystal structure of a subtilisin-like serine proteinase from the psychrotrophic marine bacterium, Vibrio sp. PA-44, was solved by means of molecular replacement and refined at 1.84 A. This is the first structure of a cold-adapted subtilase to be determined and its elucidation facilitates examination of the molecular principles underlying temperature adaptation in enzymes. The cold-adapted Vibrio proteinase was compared with known three-dimensional structures of homologous enzymes of meso- and thermophilic origin, proteinase K and thermitase, to which it has high structural resemblance. The main structural features emerging as plausible determinants of temperature adaptation in the enzymes compared involve the character of their exposed and buried surfaces, which may be related to temperature-dependent variation in the physical properties of water. Thus, the hydrophobic effect is found to play a significant role in the structural stability of the meso- and thermophile enzymes, whereas the cold-adapted enzyme has more of its apolar surface exposed. In addition, the cold-adapted Vibrio proteinase is distinguished from the more stable enzymes by its strong anionic character arising from the high occurrence of uncompensated negatively charged residues at its surface. Interestingly, both the cold-adapted and thermophile proteinases differ from the mesophile enzyme in having more extensive hydrogen- and ion pair interactions in their structures; this supports suggestions of a dual role of electrostatic interactions in the adaptation of enzymes to both high and low temperatures. The Vibrio proteinase has three calcium ions associated with its structure, one of which is in a calcium-binding site not described in other subtilases.

  • Organizational Affiliation

    Abteilung für Molekulare Strukturbiologie, Institut für Mikrobiologie und Genetik, Georg-August Universität Göttingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
extracellular subtilisin-like serine proteinase
A, B
284Vibrio sp. PA-44Mutation(s): 0 
EC: 3.4.21
Find proteins for Q8GB52 (Vibrio sp. PA-44)
Explore Q8GB52 
Go to UniProtKB:  Q8GB52
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8GB52
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.44 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.184 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.425α = 90
b = 36.842β = 93.88
c = 143.065γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-02-22
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2011-09-21
    Changes: Derived calculations
  • Version 1.4: 2016-12-21
    Changes: Structure summary
  • Version 1.5: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description