Kallikrein 1

Kallikrein-1 (KLK1) belongs to the peptidase S1 family and Kallikrein subfamily. KLK1 contains one peptidase S1 domain. KLK-1 preferential cleavage of Arg-|-Xaa bonds in small molecule substrates and also has highly selective action to release kallidin (lysyl-bradykinin) from kininogen involves hydrolysis of Met-|-Xaa or Leu-|-Xaa. Glandular kallikreins cleave Met-Lys and Arg-Ser bonds in kininogen to release Lys-bradykinin.