>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
<1.0 EU per 1 μg of the protein by the LAL method.
Measured by its ability to cleave the fluorogenic peptide substrate, Mca-RPKPVE-Nval-WRK(Dnp)-NH2 (Catalog # ES002). The specific activity is >150 pmol/min/µg, as measured under the described conditions.
Mouse myeloma cell line, NS0-derived Glu23-His252, with a C-terminal 10-His tag
Recombinant Human Kallikrein 7 (Catalog # 2624‑SE) is measured byits ability to cleave the fluorogenic peptide substrate Mca-RPKPVE-Nval-WRK(Dnp)-NH2 (Catalog # ES002).
Background: Kallikrein 7
Human tissue Kallikrein 7 (hK7), also known as stratum corneum chymotryptic enzyme (SCCE), is a member of the human tissue kallikrein family. Full-length hK7 consists of 253 amino acids, with a signal peptide (residues 1‑22), short pro peptide (residues 23‑29) and mature chain (residues 30‑252) (1). Predominantly expressed in the skin, a major physiological function of hK7 is to regulate the desquamation process through proteolysis of the intercellular adhesive structures between corneocytes (2). Thus, it is related to some inflammatory skin diseases, such as psoriasis and chronic itchy dermatitis (3, 4). Studies have shown that one potential physiological activator for hK7 is hK5, another member of the human tissue Kallikrein family. Along with hK14, these three kallikreins form a proteolytic cascade in the stratum corneum (5). The purified, secreted recombinant human K7 corresponds to the pro form. When activated by thermolysin, it displays enzymatic activity towards a fluorogenic synthetic peptide described in the Activity Assay Protocol. This activity can be inhibited by recombinant human Serpin A1, A3, A4, and A5 (Catalog # 1268-PI, 1295-PI, 1669-PI, and 1266-PI).
Hansson, L. et al. (1994) J. Bio. Chem. 269:19420.
Caubet, C. et al. (2004) J. Invest. Dermatol. 122:1235.
Ekholm, E. and Egelrud, T. (1999) Arch. Dermatol. Res. 291:195.
Hansson, L. et al. (2002) J. Invest. Dermatol. 118:444.
Brattsand, M. et al. (2004) J. Invest. Dermatol. 124:198.
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