A Review of Enzymatic Properties of Lipase in Plants, Animals and Microorganisms
Titel:
A Review of Enzymatic Properties of Lipase in Plants, Animals and Microorganisms
Auteur:
Vajanti Mala Pahoja mumtaz Ali Sethar
Verschenen in:
Journal of applied sciences
Paginering:
Jaargang 2 (2002) nr. 4 pagina's 474-484
Jaar:
2002
Inhoud:
Lipases are widely distributed in plants, animals, insects and microorganisms. In plants, lipases are mostly present in food reserve tissues of growing seedlings especially in those which contain large amounts of triacylglycerols. In animals, the lipases are found in pancreas, and on the surface of mucous cells of the gastric mucosa. In insects, these enzymes are found mostly in plasma, salivary glands, muscles and fat bodies. Lipases are versatile group of enzymes that not only hydrolyze the esters of long chain aliphatic acids from glycerol at oil/water interface but also involved in the transesterification reaction. Lipases have preference to hydrolyze triacylglycerol, diacylglycerol and monoacylglycerol to glycerol and free fatty acids. The pH ranges of plant lipase is between 4.0 to 9.0 and of those animals between 5.5 to 8.5 and of microorganisms it ranges some what higher than other two groups i.e, 6.0 to 10.0. The temperature ranges at which plant lipase remain active is between 20 to 38°C and of animals it lies between 37 to 60°C. The microbial lipase temperature is between 37 to 55°C. The plant and animal lipase activate in the presence of calcium and zinc, while they in inhibit in the presence of EDTA, Triton X-100 and Tween 80. However, the microbial enzymes inhibit in the presence of FeCl3, ZnCl2 and HgCl2. The molecular weight of lipase in plants ranges between 19000 to 270000. While animal lipase ranges 43000 to 300000. The microbial lipase molecular weight lies between 32000 to 97000.
Uitgever:
Asian Network for Scientific Information (provided by DOAJ)
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