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Crystal structure of the zymogen catalytic region of Human MASP-1
Biology and Chemistry Report
4IGD
  •   Structure Details   Hide

    Structure Keywords

    Keywords HYDROLASE
    Text Complement, Immune response, Innate immunity, beta barrel, hydrolase, serine protease, Glycosylation

    Polymeric Molecules

    Chain A
    Description Mannan-binding lectin serine protease 1 
    Fragment CCP1-CCP2-SP fragment, residues 298-699 
    Mutation R448Q 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 45490.3 
    Source Method genetically manipulated  
    Entity Name Complement factor MASP-3, Complement-activating component of Ra-reactive factor, Mannose-binding lectin-associated serine protease 1, MASP-1, Mannose-binding protein-associated serine protease, Ra-reactive factor serine protease p100, RaRF, Serine protease 5 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    GOL  GLYCEROL  C3 H8 O3   92.09  View 
     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A MASP1_HUMAN P48740     

    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      
    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. 
    3824   Catalytic Activity  Catalysis of a Biochemical Reaction At Physiological Temperatures. in Biologically Catalyzed Reactions the Reactants Are Known As Substrates and the Catalysts Are Naturally Occurring Macromolecular Substances Known As Enzymes. Enzymes Possess Specific Binding Sites For Substrates and Are Usually Composed Wholly or Largely of Protein But RNA That Has Catalytic Activity (ribozyme) Is Often Also Regarded As Enzymatic. 
    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). 


     
  •   Gene Details   Hide

    Genetic Source

    Chain A
    Common Name Human
    Scientific Name Homo sapiens  
    Gene masp1
    Host Scientific Name Escherichia coli  
    Host Strain Bl 21
    Host Vector Type Plasmid
    Host Plasmid Name pET-17b


    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    3 3q27-q28 5648     mannan-binding lectin serine peptidase 1 (C4/C2 activating component of Ra-reactive factor) MASP1