proteinase k

Proteinase K (Protease K) is a non-specific serine protease that can tolerate changes in SDS, urea, pH (4-12), salt concentration, and temperature. Proteinase K hydrolyzes a wide range of peptide bonds and is used for protein digestion.

Recombinant Proteinase K, a serine protease, targets the carboxy-terminal peptide bonds of both aliphatic and aromatic amino acids. It is utilized to digest proteins and eradicate contamination in nucleic acid preparations [1].

K-14585 is a proteinase-activated receptor 2 antagonist. K-14585 inhibited PAR(2)-mediated p65 NFkappaB phosphorylation and NFkappaB-DNA binding. K-14585 inhibited SLIGKV-stimulated IL-8 production, but given alone increased IL-8.

PAR2 (1-6) amide is a synthetic peptide agonist of proteinase-activated receptor 2 (PAR2) that corresponds to residues 1-6 of the amino terminal tethered ligand sequence of human PAR2 and residues 37-42 of the full-length sequence.1It binds to NCTC 2544 cells expressing human PAR2 (Ki= 9.64 μM in a radioligand binding assay) and induces calcium mobilization in the same cells (EC50= 0.075 μM).2PAR2 (1-6) amide (100 μM) reduces colony formation of A549 lung cancer cells.1It induces superoxide production and degranulation in isolated human eosinophils when used at a concentration of 500 μM.3PAR2 (1-6) amide (5 μmol/kg) induces tear secretion in rats when used in combination with amastatin .4 1.Bohm, S.K., Kong, W., Bromme, D., et al.Molecular cloning, expression and potential functions of the human proteinase-activated receptor-2Biochem. J.314(Pt 3)1009-1016(1996) 2.Kanke, T., Ishiwata, H., Kabeya, M., et al.Binding of a highly potent protease-activated receptor-2 (PAR2) activating peptide, [3H]2-furoyl-LIGRL-NH2, to human PAR2Br. J. Pharmacol.145(2)255-263(2005) 3.Miike, S., McWilliam, A.S., and Kita, H.Trypsin induces activation and inflammatory mediator release from human eosinophils through protease-activated receptor-2J. Immunol.167(11)6615-6622(2001) 4.Nishikawa, H., Kawai, K., Tanaka, M., et al.Protease-activated receptor-2 (PAR-2)-related peptides induce tear secretion in rats: Involvement of PAR-2 and non-PAR-2 mechanismsJ. Pharmacol. Exp. Ther.312(2)324-331(2005)

Poly-D-lysine hydrobromide (MW 30000-70000) (Poly-D-lysine HBr) is an oral peptide CaSR agonist that eliminates proteinase K-resistant PrP from prion-infected SN56 neuroblastoma cells.

NK314 is a novel synthetic benzo[c]phenanthridine alkaloid that shows strong antitumor activity. It inhibited topoisomerase II activity and stabilized topoisomerase II-DNA cleavable complexes. The DNA breaks occurred within 1h after treatment with NK314 even without digestion of topoisomerase II by proteinase K, whereas etoposide required digestion of the enzyme protein in cleavable complex to detect DNA breaks. Pretreatment with topoisomerase II catalytic inhibitors, ICRF-193 and suramin, reduced both cleavable complex-mediated DNA breaks and proteinase K-independent DNA breaks, but protease inhibitors and nuclease inhibitors only decreased the latter.

Digalacturonic acid, a pectin or pectic acid metabolite, facilitates the co-crystallization of enzymes, including proteinase K [1] [2].

Rivulariapeptolides 1155 is a potent serine protease inhibitor with inhibitory concentrations (IC50s) of 41.84 nM, 4.94 nM, and 56.54 nM against chymotrypsin, elastase, and proteinase K, respectively [1].

Rivulariapeptolides 1185, a highly potent and selective serine protease inhibitor, exhibits IC50 values of 13.17 nM for chymotrypsin, 23.59 nM for elastase, and 55.26 nM for proteinase K [1].

Rivulariapeptolides 1121 is a potent and selective serine protease inhibitor, demonstrating IC50 values of 35.52 nM for chymotrypsin, 13.24 nM for elastase, and 48.05 nM for proteinase K [1].

Rivulariapeptolides 988 demonstrates significant potency and selectivity as a serine protease inhibitor, exhibiting IC50 values of 95.46 nM for chymotrypsin, 15.29 nM for elastase, and 85.50 nM for proteinase K [1].

Molassamide B, a serine protease inhibitor, exhibits potent inhibitory activity, as evidenced by its IC50 values of 24.65 nM against chymotrypsin, 11.69 nM against elastase, and 5.42 nM against proteinase K [1].

MeOSuc-AAPF-CMK (MeOSuc-Ala-Ala-Pro-Phe-CH2Cl) is a potent inhibitor of proteinase K [1].