Description

• Application: Collagenase from Clostridium histolyticum has been used:in the preparation of collagenase solution for the digestion of tumor tissues[1]as a supplement in phosphate-buffered saline for the digestion of extirpated mesenteric fat tissue[2]as a supplement in Roswell Park Memorial Institute-1640 medium (RPMI-1640) for the digestion of colon segments[3]for the digestion of endometrium tissues[4]in the preparation of enzyme A and enzyme B for the digestion of decapsulated testes[5]
• Biochem/physiol Actions: Clostridium histolyticum produces two classes of collagenases. Clostridial collagenases are more efficient than mammalian collagenases. It cleaves at multiple cleavage sites within the collagen triple helix. Clostridial collagenases is implicated in the bacterial invasion in gas gangrene.[6]
• Caution: As supplied, this product is stable for 6 years at -20°C. There is no loss in FALGPA or protease activity in 30 days at 37°C, 50°C and -20°C. Solutions of crude collagenase are stable if frozen quickly in aliquots (at 10 mg/mL) and kept frozen at -20°C. Further freeze-thaw cycles will damage the solution. The product retains 100% activity over 7 hours when held on ice.
• Unit Definition: One collagen digestion unit (CDU) liberates peptides from collagen from bovine achilles tendon equivalent in ninhydrin color to 1.0 μmole of leucine in 5 hours at pH 7.4 at 37 °C in the presence of calcium ions. One FALGPA hydrolysis unit hydrolyzes 1.0 μmole of furylacryloyl-Leu-Gly-Pro-Ala per min at 25°C. One Neutral Protease unit hydrolyzes casein to produce color equivalent to 1.0 μmole of tyrosine per 5 hr at pH 7.5 at 37°C. One Clostripain Unit hydrolyzes 1.0 μmole of BAEE per min at pH 7.6 at 25°C in the presence of DTT.
• Preparation Note: Solutions are typically prepared at 1-2 mg/mL in TESCA buffer (containing 50 mM TES, 0.36 mM Calcium chloride, pH 7.4 at 37°C.This product also contains clostripain, neutral protease and tryptic activities.