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Structure of Complement C3b: Insights into Complement Activation and Regulation
Biology and Chemistry Report
2HR0
  •   Structure Details   Hide

    Structure Keywords

    Keywords IMMUNE SYSTEM
    Text Complement component c3b, IMMUNE SYSTEM

    Polymeric Molecules

    Chain A
    Description Complement C3 beta chain 
    Fragment residues 23-667 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 71410.2 
    Source Method natural source  
    Chain B
    Description Complement C3 alpha' chain 
    Fragment residues 749-1663 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 104074.0 
    Source Method natural source  

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    THC  N-METHYLCARBONYLTHREONINE  C6 H11 N O4   161.16  View 
     
  •   Protein Details   Hide

    UniProtKB Information

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

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A
    GO ID   Ontology GO Term Definition
    4866   Endopeptidase Inhibitor Activity  Stops Prevents or Reduces the Activity of an Endopeptidase Any Enzyme That Hydrolyzes Nonterminal Peptide Bonds in Polypeptides. 
    Chain B
    GO ID   Ontology GO Term Definition
    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. 
    4866   Endopeptidase Inhibitor Activity  Stops Prevents or Reduces the Activity of an Endopeptidase Any Enzyme That Hydrolyzes Nonterminal Peptide Bonds in Polypeptides. 


     
  •   Gene Details   Hide

    Natural Source

    Chain B
    Common Name Human
    Scientific Name Homo sapiens  
    Genus Homo
    Chain A
    Common Name Human
    Scientific Name Homo sapiens  
    Genus Homo

    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
    rs201572119 LS-SNP   dbSNP   A 2 P - > L Coil 33% (Intermediate) 19 6720530
    rs141447426 LS-SNP   dbSNP   A 26 D - > N Bend 60% (Exposed) 19 6719347
    rs2230199 LS-SNP   dbSNP   A 80 R - > G Turn 88% (Exposed) 19 6718387
    rs201985442 LS-SNP   dbSNP   A 102 S - > N Beta Ladder 13% (Intermediate) 19 6718320
    rs199970572 LS-SNP   dbSNP   A 123 V - > I Beta Ladder 0% (Buried) 19 6718258
    rs147859257 LS-SNP   dbSNP   A 133 K - > Q Turn 41% (Exposed) 19 6718146
    rs199831618 LS-SNP   dbSNP   A 152 P - > L Beta Ladder 39% (Exposed) 19 6714441
    rs146130553 LS-SNP   dbSNP   A 153 V - > I Beta Ladder 47% (Exposed) 19 6714439
    rs147549358 LS-SNP   dbSNP   A 177 V - > I Coil 21% (Intermediate) 19 6714367
    rs201681678 LS-SNP   dbSNP   A 185 R - > Q Beta Ladder 40% (Exposed) 19 6714239
    rs149906766 LS-SNP   dbSNP   A 189 E - > K Turn 48% (Exposed) 19 6714228
    rs200918899 LS-SNP   dbSNP   A 235 A - > T Beta Ladder 0% (Buried) 19 6714007
    rs140126161 LS-SNP   dbSNP   A 255 D - > E Beta Ladder 44% (Exposed) 19 6713463
    rs146167974 LS-SNP   dbSNP   A 257 E - > K Turn 32% (Intermediate) 19 6713459
    rs200538609 LS-SNP   dbSNP   A 279 V - > M Beta Ladder 34% (Intermediate) 19 6713302
    rs139527231 LS-SNP   dbSNP   A 288 G - > R Bend 23% (Intermediate) 19 6713275
    rs1047286 LS-SNP   dbSNP   A 292 P - > L Coil 74% (Exposed) 19 6713262
    rs138945756 LS-SNP   dbSNP   A 302 L - > F Beta Ladder 0% (Buried) 19 6713231
    rs192989551 LS-SNP   dbSNP   A 315 D - > E Coil 1% (Buried) 19 6712627
    rs141737564 LS-SNP   dbSNP   A 326 I - > V Beta Ladder 2% (Buried) 19 6712596
    rs201714568 LS-SNP   dbSNP   A 403 R - > L Beta Ladder 19% (Intermediate) 19 6711203
    rs200967589 LS-SNP   dbSNP   A 403 R - > C Beta Ladder 19% (Intermediate) 19 6711204
    rs146158711 LS-SNP   dbSNP   A 410 S - > P Coil 43% (Exposed) 19 6711183
    rs143430438 LS-SNP   dbSNP   A 430 S - > T Coil 31% (Intermediate) 19 6711123
    rs148820222 LS-SNP   dbSNP   A 446 G - > R Turn 75% (Exposed) 19 6711075
    rs11569422 LS-SNP   dbSNP   A 447 E - > D Bend 64% (Exposed) 19 6711070
    rs149692538 LS-SNP   dbSNP   A 460 A - > T Turn 62% (Exposed) 19 6711033
    rs200165327 LS-SNP   dbSNP   A 483 R - > H Beta Ladder 13% (Intermediate) 19 6710822
    rs139744070 LS-SNP   dbSNP   A 491 D - > N Bend 70% (Exposed) 19 6710799
    rs142290953 LS-SNP   dbSNP   A 501 T - > A Turn 32% (Intermediate) 19 6710769
    rs201237210 LS-SNP   dbSNP   A 518 A - > S Bend 47% (Exposed) 19 6710718
    rs143887460 LS-SNP   dbSNP   A 520 G - > D Bend 57% (Exposed) 19 6710711
    rs200541526 LS-SNP   dbSNP   A 540 S - > L Coil 42% (Exposed) 19 6710651
    rs121909583 LS-SNP   dbSNP   A 570 R - > Q Beta Ladder 37% (Exposed) 19 6709765
    rs140637006 LS-SNP   dbSNP   A 585 K - > E Coil 55% (Exposed) 19 6709721
    rs201572752 LS-SNP   dbSNP   A 590 T - > M Coil 43% (Exposed) 19 6709705
    rs113676835 LS-SNP   dbSNP   A 597 V - > A Helix 32% (Intermediate) 19 6707930
    rs146613648 LS-SNP   dbSNP   A 597 V - > M Helix 32% (Intermediate) 19 6707931
    rs144432231 LS-SNP   dbSNP   A 603 I - > F Bend 11% (Intermediate) 19 6707913
    rs140655115 LS-SNP   dbSNP   A 611 K - > R Bend 45% (Exposed) 19 6707888
    rs145886287 LS-SNP   dbSNP   A 614 A - > ST Bend 5% (Buried) 19 6707880
    rs149850773 LS-SNP   dbSNP   A 615 G - > R Helix 10% (Intermediate) 19 6707877
    rs145461148 LS-SNP   dbSNP   A 627 S - > T Bend 32% (Intermediate) 19 6707840
    rs139893485 LS-SNP   dbSNP   A 631 Q - > R Beta 54% (Exposed) 19 6707828
    rs112187261 LS-SNP   dbSNP   A 641 P - > L Bend 75% (Exposed) 19 6707536
    rs199535288 LS-SNP   dbSNP   A 645 A - > T Coil 146% (Exposed) 19 6707525