PTMScan® Lys-C Protease #39003
Inquiry Info. # 39003
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Product Information
Product Usage Information
For PTMScan® protocols we recommend making a 5 mg/ml stock solution by resuspending 1.2 mg in 0.24 ml of 20 mM HEPES pH 8.0, aliquot for single use and store at -80°C. See the PTMScan® protocol for further details.
Storage
Store lyophilized Lys-C at -20°C. Once reconstituted, the enzyme can be aliquoted and stored at -80°C to help avoid damaging freeze thaw cycles. Lyophilized Lys-C has a shelf life of 1 year at -20°C and solutions are stable for 6 months at -80°C.
Product Description
Lysl-endopeptidase (Lys-C) hydrolyzes amide and peptide ester bonds on the carboxyl side of lysine residues and hydrolyzes S-aminoethylcysteine residues.
Specificity / Sensitivity
The activity of Lys-C is greater than or equal to 3 AU/mg.
Source / Purification
Lys-C was produced recombinantly in E. coli, purified and is provided lyophilized in 25 mM Tris-HCl and mannitol. Purity is >90% by SDS-PAGE. One amidase unit (AU) is the amount of enzyme that produces 1 micromole of Ac-Lys-pNA hydrochloride salt per minute at pH 9.5 at 30°C.
Background
Lysl-endopeptidase (Lys-C) cleaves proteins on the carboxyl side of lysine residues. This makes it a useful tool in protein sequencing and proteomic applications. The enzyme was originally purified from the Gram-negative soil bacteria Achromobacter lyticus (1). PTMScan® Lys-C is produced recombinantly in E. coli. It has been found to work optimally at the temperatures of 30-37°C and pH ranges from 9.0-9.5 but will undergo degradation at temperatures of 50°C and higher. Activity is maintained in 4M urea or 0.1% SDS solutions for up to 6 hours at 30°C. Inhibitors of the enzyme include PMSF, DFP, and TLCK.
限制使用
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For Research Use Only. Not for Use in Diagnostic Procedures.
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