Complement subcomponent C1r
Definition:
EC Tree > 3 Hydrolases > 3.4 Acting on peptide bonds (peptidases) > 3.4.21 Serine endopeptidases > 3.4.21.41 complement subcomponent C1r
Complement subcomponent C1r is a classical-pathway serine protease in family S1 activated from proenzyme C1r in plasma during classical complement activation; it selectively cleaves a Lys(or Arg)-Ile bond in C1s to form active C1s. By autoactivating and then activating C1s it initiates the classical complement cascade. It appears in viruses and cellular organisms.
Complement subcomponent C1r is a classical-pathway serine protease in family S1 activated from proenzyme C1r in plasma during classical complement activation; it selectively cleaves a Lys(or Arg)-Ile bond in C1s to form active C1s. By autoactivating and then activating C1s it initiates the classical complement cascade. It appears in viruses and cellular organisms.
References:
Biomedical Dictionary
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