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Structural consequences of accommodation of four non-cognate amino-acid residues in the S1 pocket of bovine trypsin and chymotrypsin
Biology and Chemistry Report
1P2Q
  •   Structure Details   Hide

    Structure Keywords

    Keywords hydrolase/hydrolase inhibitor
    Text trypsin; chymotrypsin; serine proteinase; bovine pancreatic trypsin inhibitor; protein-protein interaction; non-cognate binding; S1 pocket; primary specificity; crystal structure, hydrolase-hydrolase inhibitor COMPLEX

    Polymeric Molecules

    Chain A,C
    Description Chymotrypsinogen A 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 25686.2 
    Source Method natural source  
    Chain B,D
    Description Pancreatic trypsin inhibitor 
    Mutation K15F, M52L 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 6527.6 
    Source Method genetically manipulated  
    Entity Name Basic protease inhibitor, BPI, BPTI, Aprotinin 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    SO4  SULFATE ION  O4 S   96.06  View 
    TRS  2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL  C4 H12 N O3   122.14  View 
     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,C CTRA_BOVIN P00766     
    B,D BPT1_BOVIN P00974     

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc Catalytic Site(s)
    A C  3.4.21.1        
    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. 
    7586   Digestion  The Whole of the Physical Chemical and Biochemical Processes Carried Out by Multicellular Organisms to Break Down Ingested Nutrients Into Components That May Be Easily Absorbed and Directed Into Metabolism. 
    5576   Extracellular Region  The Space External to the Outermost Structure of a Cell. For Cells Without External Protective or External Encapsulating Structures This Refers to Space Outside of the Plasma Membrane. This Term Covers the Host Cell Environment Outside an Intracellular Parasite. 
    5615   Extracellular Space  That Part of a Multicellular Organism Outside the Cells Proper Usually Taken to Be Outside the Plasma Membranes and Occupied by Fluid. 
    5515   Protein Binding  Interacting Selectively and Non Covalently with Any Protein or Protein Complex (a Complex of Two or More Proteins That May Include Other Nonprotein Molecules). 
    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. 


     
  •   Gene Details   Hide

    Natural Source

    Chain A,C
    Common Name Cattle
    Scientific Name Bos taurus  
    Genus Bos

    Genetic Source

    Chain B,D
    Common Name Cattle
    Scientific Name Bos taurus  
    Genus Bos
    Host Scientific Name Escherichia coli bl21(de3)  
    Host Genus Escherichia
    Host Species Escherichia Coli
    Host Strain Bl21 (de3)
    Host Vector Type Plasmid
    Host Plasmid Name pAED4
    Description T7 Promoter


    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    13 - 404172     pancreatic trypsin inhibitor PTI    
    18 - 529639     chymotrypsinogen B2 CTRB2