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colipase : ウィキペディア英語版
colipase

Colipase is a protein co-enzyme required for optimal enzyme activity of pancreatic lipase. It is secreted by the pancreas in an inactive form, procolipase, which is activated in the intestinal lumen by trypsin. Its function is to prevent the inhibitory effect of bile salts on the lipase-catalyzed intraduodenal hydrolysis of dietary long-chain triglycerides.
In humans, the colipase protein is encoded by the ''CLPS'' gene.
== Protein domain ==

Colipase is also a family of evolutionarily related proteins.
Colipase is a small protein cofactor needed by pancreatic lipase for efficient dietary lipid hydrolyisis. Efficient absorption of dietary fats is dependent on the action of pancreatic triglyceride lipase. Colipase binds to the C-terminal, non-catalytic domain of lipase, thereby stabilising an active conformation and considerably increasing the hydrophobicity binding site. Structural studies of the complex and of colipase alone have revealed the functionality of its architecture.
Colipase is a small protein with five conserved disulphide bonds. Structural analogies have been recognised between a developmental protein (Dickkopf), the pancreatic lipase C-terminal domain, the N-terminal domains of lipoxygenases and the C-terminal domain of alpha-toxin. These non-catalytic domains in the latter enzymes are important for interaction with membrane. It has not been established if these domains are also involved in eventual protein cofactor binding as is the case for pancreatic lipase.〔


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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