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CATH Classification

Domain Context

CATH Clusters

Superfamily Trypsin-like serine proteases
Functional Family

Enzyme Information

3.4.21.34
Plasma kallikrein.
based on mapping to UniProt P03952
Cleaves selectively Arg-|-Xaa and Lys-|-Xaa bonds, including Lys-|-Arg and Arg-|-Ser bonds in (human) kininogen to release bradykinin.
-!- Formed from plasma prokallikrein (Fletcher factor) by factor XIIa. -!- Activates coagulation factors XII, VII and plasminogen. -!- Selective for Arg > Lys in P1, in small molecule substrates. -!- Belongs to peptidase family S1. -!- Formerly EC 3.4.4.21 and EC 3.4.21.8.

UniProtKB Entries (1)

P03952
KLKB1_HUMAN
Homo sapiens
Plasma kallikrein

PDB Structure

PDB 6O1S
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Structures of full-length plasma kallikrein bound to highly specific inhibitors describe a new mode of targeted inhibition.
Partridge, J.R., Choy, R.M., Silva-Garcia, A., Yu, C., Li, Z., Sham, H., Metcalf, B.
J.Struct.Biol.
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