Experimental Data Snapshot

  • Resolution: 1.40 Å

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This is version 1.3 of the entry. See complete history


Crystal structure of the alkaline proteinase Savinase from Bacillus lentus at 1.4 A resolution.

Betzel, C.Klupsch, S.Papendorf, G.Hastrup, S.Branner, S.Wilson, K.S.

(1992) J Mol Biol 223: 427-445

  • DOI: https://doi.org/10.1016/0022-2836(92)90662-4
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Savinase (EC3.4.21.14) is secreted by the alkalophilic bacterium Bacillus lentus and is a representative of that subgroup of subtilisin enzymes with maximum stability in the pH range 7 to 10 and high activity in the range 8 to 12. It is therefore of major industrial importance for use in detergents. The crystal structure of the native form of Savinase has been refined using X-ray diffraction data to 1.4 A resolution. The starting model was that of subtilisin Carlsberg. A comparison to the structures of the closely related subtilisins Carlsberg and BPN' and to the more distant thermitase and proteinase K is presented. The structure of Savinase is very similar to those of homologous Bacillus subtilisins. There are two calcium ions in the structure, equivalent to the strong and the weak calcium-binding sites in subtilisin Carlsberg and subtilisin BPN', well known for their stabilizing effect on the subtilisins. The structure of Savinase shows novel features that can be related to its stability and activity. The relatively high number of salt bridges in Savinase is likely to contribute to its high thermal stability. The non-conservative substitutions and deletions in the hydrophobic binding pocket S1 result in the most significant structural differences from the other subtilisins. The different composition of the S1 binding loop as well as the more hydrophobic character of the substrate-binding region probably contribute to the alkaline activity profile of the enzyme. The model of Savinase contains 1880 protein atoms, 159 water molecules and two calcium ions. The crystallographic R-factor [formula; see text].

  • Organizational Affiliation

    European Molecular Biology Laboratory (EMBL), Hamburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SAVINASE (TM)269Lederbergia lentaMutation(s): 0 
Find proteins for P29600 (Lederbergia lenta)
Explore P29600 
Go to UniProtKB:  P29600
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29600
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.47α = 90
b = 64.24β = 118.8
c = 42.89γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-03-06
    Changes: Data collection, Database references, Derived calculations, Other