منابع مشابه
Lipoprotein lipase: molecular interactions of the enzyme.
Lipoprotein lipase (EC 3.1.1.34), as the extrahepatic enzyme responsible for the hydrolysis of plasma lipoprotein triacylglycerol, plays a pivotal role in the metabolism of circulating lipids. The Occurrence and action of the enzyme in lipoprotein metabolism has been the subject of a number of recent reviews (Cryer, 1981 ; Quinn et al., 1982; Hamash & Hamash, 1983) and this aspect will not be c...
متن کاملA comparison of molecular properties of hepatic triglyceride lipase and lipoprotein lipase from human post-heparin plasma.
Hepatic triglyceride lipase was isolated from human post-heparin plasma by the method of Ehnholm et al. using modifications which increased the specific activity 12-fold to approximately 3,000 mumol of free fatty acid/h/mg of protein. Lipoprotein lipase with similar specific activity was prepared from the same plasma samples using heparin and concanavalin A affinity chromatography. The molecula...
متن کاملSeparation of molecular species of lipoprotein lipase from adipose tissue.
When NH(4)OH-NH(4)Cl extracts of adipose acetone powder were applied to agarose gel chromatography columns, two peaks of lipoprotein lipase were eluted. The first activity peak (LPL(a)) was eluted with an elution volume of a protein of molecular weight approximately five times that of the second (LPL(b)). Addition of heparin to the eluted fractions markedly stimulated activity of LPL(a), but su...
متن کاملChimeras of Hepatic Lipase and Lipoprotein Lipase
Chimeric molecules between human lipoprotein lipase (LPL) and rat hepatic lipase (HL) were used to identify structural elements responsible for functional differences. Based on the close sequence homology with pancreatic lipase, both LPL and HL are believed to have a two-domain structure composed of an aminoterminal (NHz-terminal) domain containing the catalytic Ser-His-Asp triad and a smaller ...
متن کاملActivation of Lipoprotein Lipase
Lipoprotein lipase (LPL) from rat heart acetone powders has been reported to depend on the presence of NH4 + , calcium, or other divalent cations for optimal activity. In addition, the enzyme will not hydrolyze an artificial triglyceride emulsion unless it is converted to an active substrate by the addition of very low density lipoproteins, high density lipoproteins (HDL), or certain peptides c...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 2005
ISSN: 0014-2956,1432-1033
DOI: 10.1111/j.1432-1033.1982.tb06640.x