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Crystal Structure of the Human C3a anaphylatoxin
Biology and Chemistry Report
  •   Structure Details   Hide

    Structure Keywords

    Keywords IMMUNE SYSTEM
    Text complement system, anaphylatoxins, inflammation, innate immunity, four-helix-bundle, C5a, C5a desArg, IMMUNE SYSTEM

    Polymeric Molecules

    Chain A,B
    Description Complement C3 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 9499.2 
    Source Method genetically manipulated  
    Entity Name C3 and PZP-like alpha-2-macroglobulin domain-containing protein 1, Complement C3 beta chain, Complement C3 alpha chain, C3a anaphylatoxin, Acylation stimulating protein, ASP, C3adesArg, Complement C3b alpha' chain, Complement C3c alpha' chain fragment 1, Complement C3dg fragment, Complement C3g fragment, Complement C3d fragment, Complement C3f fragment, Complement C3c alpha' chain fragment 2 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    SO4  SULFATE ION  O4 S   96.06  View 
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,B CO3_HUMAN P01024     

    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,B
    GO ID   Ontology GO Term Definition
    6954   Inflammatory Response  The Immediate Defensive Reaction (by Vertebrate Tissue) to Infection or Injury Caused by Chemical or Physical Agents. the Process Is Characterized by Local Vasodilation Extravasation of Plasma Into Intercellular Spaces and Accumulation of White Blood Cells and Macrophages. 
    6956   Complement Activation  Any Process Involved in the Activation of Any of the Steps of the Complement Cascade Which Allows For the Direct Killing of Microbes the Disposal of Immune Complexes and the Regulation of Other Immune Processes; the Initial Steps of Complement Activation Involve One of Three Pathways the Classical Pathway the Alternative Pathway and the Lectin Pathway All of Which Lead to the Terminal Complement Pathway. 
    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. 

  •   Gene Details   Hide

    Genetic Source

    Chain A,B
    Common Name Human
    Scientific Name Homo sapiens  
    Gene c3, cpamd1
    Host Scientific Name Escherichia coli  
    Host Strain Shuffle T7
    Host Vector Type Plasmid
    Host Plasmid Name pET32a

    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    19 19p13.3-p13.2 718     complement component 3 C3    

    Single Nucleotide Polymorphisms (from LS-SNP database)

    SNP ID LsSnp Link dbSNP Link Chain PDB position Amino acid changes Secondary structure Solvent Accessibility Chromosome Chromosome position Ligand
    rs139945572 LS-SNP   dbSNP   A 676 T - > M Helix 51% (Exposed) 19 6707497
    rs201872466 LS-SNP   dbSNP   A 684 G - > S Helix 50% (Exposed) 19 6707282
    rs201285239 LS-SNP   dbSNP   A 735 R - > Q Helix 19% (Intermediate) 19 6707128
    rs117793540 LS-SNP   dbSNP   A 735 R - > W Helix 19% (Intermediate) 19 6707129