申请人:Kerovuo Janne S.
公开号:US20090297495A1
公开(公告)日:2009-12-03
The invention provides hydrolases, polynucleotides encoding them, and methods of making and using these polynucleotides and polypeptides. In one aspect, the invention is directed to polypeptides, e.g., enzymes, having a hydrolase activity, e.g., an esterase, acylase, lipase, phospholipase (e.g., phospholipase A, B, C and D activity, patatin activity, lipid acyl hydrolase (LAH) activity) or protease activity, including thermostable and thermotolerant hydrolase activity, and polynucleotides encoding these enzymes, and making and using these polynucleotides and polypeptides. The hydrolase activities of the polypeptides and peptides of the invention include esterase activity, lipase activity (hydrolysis of lipids), acidolysis reactions (to replace an esterified fatty acid with a free fatty acid), transesterification reactions (exchange of fatty acids between triglycerides), ester synthesis, ester interchange reactions, phospholipase activity and protease activity (hydrolysis of peptide bonds). In another aspect, the invention provides methods for hydrolyzing steryl esters and triglycerides (e.g., in a paper pulp), into sterols, glycerol and free fatty acids, using enzyme(s) of the invention. The invention provides enzymes and methods for decreasing the amount of lipophilic extracts (“pitch”) in a pulp-comprising composition. The polypeptides of the invention can be used in a variety of pharmaceutical, agricultural and industrial contexts, including the manufacture of cosmetics and nutraceuticals.
本发明提供了水解酶、编码它们的多核苷酸以及制备和使用这些多核苷酸和多肽的方法。在一方面,本发明涉及具有水解酶活性的多肽,例如酯酶、酰化酶、脂肪酶、磷脂酶(例如磷脂酶A、B、C和D活性、马铃薯酯酶活性、脂肪酰基水解酶(LAH)活性)或蛋白酶活性,包括热稳定和热耐受的水解酶活性,以及编码这些酶的多核苷酸,以及制备和使用这些多核苷酸和多肽。本发明的多肽和多肽的水解酶活性包括酯酶活性、脂肪酶活性(脂肪水解)、酸解反应(用自由脂肪酸替换酯化脂肪酸)、酯交换反应(三酰甘油之间的脂肪酸交换)、酯合成、酯交换反应、磷脂酶活性和蛋白酶活性(肽键水解)。在另一方面,本发明提供了使用本发明的酶水解固醇酯和三酰甘油(例如在纸浆中),制备固醇、甘油和自由脂肪酸的方法。本发明提供了降低含浸物(“漆”)在纸浆组成物中的量的酶和方法。本发明的多肽可以在各种制药、农业和工业环境中使用,包括制造化妆品和营养保健品。