Kallikrein 11 Protein (recombinant human)

Activity: Measured by its ability to cleave a colorimetric peptide substrate D-Val-Leu-Lys-ThioBenzyl ester (VLK-SBzl), in the presence of 5,5'Dithio-bis (2-nitrobenzoic acid) (DTNB) (Edwards, K.M. et al.,1999, J. Biol. Chem. 274: 30468). The specific activity is >200 pmoles/min/µg.(Activation description: The proenzyme needs to be activated by Thermolysin for an activated form) Protein Construction: Recombinant Human Kallikrein 11 is produced by our Mammalian expression system and the target gene encoding Glu19-Asn250 is expressed with a 6His tag at the C-terminus. Sequence: Glu19-Asn250. Fusion tag: C-6His Endotoxin: < 1.0 EU per µg as determined by the LAL method. Apparent Molecular Mass: 38 kDa. Protein function: Human Kallikrein 11 (KLK11) is a member of tissue kallikrein family which are extracellular serine proteases consisting of 15 members. Two isoforms of KLK11 are differentially expressed. Isoform 1 is predominantly expressed in brain and isoform 2 is preferentially expressed in prostate. Isoform 1 consists of a signal peptide,a short pro peptide and the mature chain.Isoform 2 contains an extra 32 amino acid N terminal to full-length isoform 1.KLK11 is a novel marker for ovarian and prostate cancer carcinomas. KLK11 can be activated by thermolysin and is active against a thioester substrate. Protein function: Possible multifunctional protease. Efficiently cleaves 'bz-Phe-Arg-4-methylcoumaryl-7-amide', a kallikrein substrate, and weakly cleaves other substrates for kallikrein and trypsin. Cleaves synthetic peptides after arginine but not lysine residues. [The UniProt Consortium]