Limulus clotting factor B
| Limulus clotting factor B | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 3.4.21.85 | ||||||||
| CAS no. | 848851-53-6 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
Limulus clotting factor B (EC 3.4.21.85) is an enzyme. This enzyme catalyses the following chemical reaction:
- Selective cleavage of -Arg98-Ile99- bond in limulus proclotting enzyme to form active clotting enzyme
This enzyme is present in the hemocyte granules of the horseshoe crabs Limulus and Tachypleus. In the immunity-related clotting pathways of these organisms, factor B is downstream of Limulus clotting factor C, but upstream of Limulus clotting enzyme.