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Crystal structure of Streptomyces caespitosus sermetstatin in complex with Bacillus licheniformis subtilisin
Biology and Chemistry Report
  •   Structure Details   Hide

    Structure Keywords

    Keywords Hydrolase/Hydrolase Inhibitor
    Text Streptomyces subtilisin inhibitor fold, Subtilisin Carlsberg, Hydrolase-Hydrolase Inhibitor complex

    Polymeric Molecules

    Chain A,C
    Description KerA 
    Fragment Mature protease 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 27306.4 
    Source Method natural source  
    Entity Name Subtilisin 
    Chain B,D
    Description Neutral proteinase inhibitor ScNPI 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 11923.4 
    Source Method genetically manipulated  
    Entity Name Sermetstatin 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    1AX  (2R,2'R)-3,3'-oxydipropane-1,2-diol  C6 H14 O5   166.17  View 
    ACT  ACETATE ION  C2 H3 O2   59.04  View 
    CA  CALCIUM ION  Ca   40.08  View 
    CAC  CACODYLATE ION  C2 H6 As O2   136.99  View 
    CL  CHLORIDE ION  Cl   35.45  View 
    GOL  GLYCEROL  C3 H8 O3   92.09  View 
    IPA  ISOPROPYL ALCOHOL  C3 H8 O   60.10  View 
    POTASSIUM ION  K   39.10  View 
    PO4  PHOSPHATE ION  O4 P   94.97  View 
    ZN  ZINC ION  Zn   65.41  View 
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,C Q9FDF2_BACLI Q9FDF2     
    B,D Q9FDS0_STRCS Q9FDS0     

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    A C      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,C
    GO ID   Ontology GO Term Definition
    6508   Proteolysis  The Hydrolysis of Proteins Into Smaller Polypeptides And/or Amino Acids by Cleavage of Their Peptide Bonds. 
    4252   Serine Type Endopeptidase Activity  Catalysis of the Hydrolysis of Internal Alpha Peptide Bonds in a Polypeptide Chain by a Catalytic Mechanism That Involves a Catalytic Triad Consisting of a Serine Nucleophile That Is Activated by a Proton Relay Involving an Acidic Residue (e.g. Aspartate or Glutamate) and a Basic Residue (usually Histidine). 
    Chain B,D
    GO ID   Ontology GO Term Definition
    4867   Serine Type Endopeptidase Inhibitor Activity  Stops Prevents or Reduces the Activity of Serine Type Endopeptidases Enzymes That Catalyze the Hydrolysis of Nonterminal Peptide Bonds in a Polypeptide Chain; a Serine Residue (and a Histidine Residue) Are At the Active Center of the Enzyme. 

  •   Gene Details   Hide

    Natural Source

    Chain A,C
    Scientific Name Bacillus licheniformis  

    Genetic Source

    Chain B,D
    Scientific Name Streptomyces caespitosus  
    Gene scnpi
    Host Scientific Name Escherichia coli  
    Host Strain Origami
    Host Vector Type Pet
    Host Plasmid Name pET32a