EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
3.4.21.41 | complement component C1s |
activates the proenzyme form of C1s by limited proteolysis |
Homo sapiens |
? |
- |
? |
3.4.21.41 | complement component C1s + H2O |
- |
Homo sapiens |
complement component C1sbar |
- |
? |
3.4.21.41 | complement component C1s + H2O |
cleavage of a single Arg-Ile or Lys-Ile bond in C1s |
Homo sapiens |
complement component C1sbar |
- |
? |
3.4.21.41 | complement component C1s + H2O |
cleavage of a single Arg-Ile bond in the sequence Lys-Gln-Arg-Ile-Ile-Gly |
Homo sapiens |
complement component C1sbar |
- |
? |
3.4.21.41 | complement component C1s + H2O |
C1rbar does not hydrolyze any amino acid ester tested nor any protein substrate except subcomponent C1s |
Homo sapiens |
complement component C1sbar |
- |
? |
3.4.21.41 | complement component C1s + H2O |
C1R and its activated fragments all cleave C1s, in the order of increasing efficiency: C21r, CCP1/2-SP, CCP2-SP. CCP1 is not involved in C1s recognition |
Homo sapiens |
complement component C1sbar |
- |
? |
3.4.21.41 | complement component C1s + H2O |
- |
Homo sapiens |
activated complement component C1s + ? |
- |
? |
3.4.21.41 | complement component C1s + H2O |
- |
Sebastes schlegelii |
activated complement component C1s + ? |
- |
? |
3.4.21.41 | complement component C1s + H2O |
- |
Oplegnathus fasciatus |
activated complement component C1s + ? |
- |
? |
3.4.21.41 | complement component C1s + H2O |
the enzyme is part of the Ca2+-dependent tetramer C1s-C1r-C1r-C1s, termed as C1 complex, which is associated with the recognition molecule C1q, autoactivation of C1r, which then activates proenzyme C1s through cleavage at an Arg-Ile bond in the serine domain, C1r is active in the classical pathway of the complement system |
Homo sapiens |
activated complement component C1s + ? |
- |
? |