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Crystal structure of human chymotrypsin C (CTRC) bound to inhibitor eglin c from Hirudo medicinalis
Biology and Chemistry Report
4H4F
  •   Structure Details   Hide

    Structure Keywords

    Keywords hydrolase/hydrolase inhibitor
    Text Serine protease, protease inhibitor, hydrolase-hydrolase inhibitor complex

    Polymeric Molecules

    Chain A
    Description Chymotrypsin-C 
    Fragment Chymotrypsin C (unp residues 30-268) 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 28055.0 
    Source Method genetically manipulated  
    Entity Name Caldecrin 
    Chain B
    Description Eglin C 
    Fragment Eglin c (unp residues 8-70) 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 8072.2 
    Source Method genetically manipulated  
    Chain Q
    Description Chymotrypsin-C 
    Fragment CTRC propeptide (unp residues 17-26) 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 1030.2 
    Source Method genetically manipulated  
    Entity Name Caldecrin 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    PO4  PHOSPHATE ION  O4 P   94.97  View 
     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A CTRC_HUMAN A8K082     
    B ICIC_HIRME P01051     
    Q CTRC_HUMAN A8K082     

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    3.4.21.2      
    3.4.21.2      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A
    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. 
    8233   Peptidase Activity  Catalysis of the Hydrolysis of a Peptide Bond. a Peptide Bond Is a Covalent Bond Formed When the Carbon Atom From the Carboxyl Group of One Amino Acid Shares Electrons with the Nitrogen Atom From the Amino Group of a Second Amino Acid. 
    8236   Serine Type Peptidase Activity  Catalysis of the Hydrolysis of 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). 
    16787   Hydrolase Activity  Catalysis of the Hydrolysis of Various Bonds E.g. C O C N C C Phosphoric Anhydride Bonds Etc. Hydrolase Is the Systematic Name For Any Enzyme of EC Class 3. 
    Chain B
    GO ID   Ontology GO Term Definition
    10466   Negative Regulation of Peptidase Activity  Any Process That Stops or Reduces the Rate of Peptidase Activity the Hydrolysis of Peptide Bonds Within Proteins. 
    10951   Negative Regulation of Endopeptidase Activity  Any Process That Decreases the Frequency Rate or Extent of Endopeptidase Activity the Endohydrolysis of Peptide Bonds Within Proteins. 
    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. 
    30414   Peptidase Inhibitor Activity  Stops Prevents or Reduces the Activity of a Peptidase Any Enzyme That Catalyzes the Hydrolysis Peptide Bonds. 


     
  •   Gene Details   Hide

    Genetic Source

    Chain Q
    Common Name Human
    Scientific Name Homo sapiens  
    Gene clcr, ctrc
    Host Strain Hek 293t


    Chain B
    Common Name Medicinal Leech
    Scientific Name Hirudo medicinalis  
    Host Scientific Name Escherichia coli  
    Host Strain Bl21(de3)


    Chain A
    Common Name Human
    Scientific Name Homo sapiens  
    Gene clcr, ctrc
    Host Strain Hek 293t


    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    1 1p36.21 11330     chymotrypsin C (caldecrin) CTRC