Transglutaminases |
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Authors: | Laszlo Lorand Sylvia M Conrad |
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Institution: | (1) Department of Biochemistry, Molecular and Cell Biology, Northwestern University, 60201 Evanston, IL, USA |
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Abstract: | Summary This paper is intended as a background to the topic of transglutaminases, while focusing on current ideas regarding the biological roles of these enzymes. Specifically, the following topics are discussed: geometry of forming -glutamyl--lysine cross-linked structures; energetic considerations; the -glutamyl--lysine cross-link; amine incorporation assays; artefactual incorporation of amines in cells and tissue homogenates; synthetic substrate systems; regulation of transglutaminase activities; strategies for probing transglutaminase-mediated events in biological systems; the blood clotting paradigm; transglutaminase and cell aging: the Ca2+-enriched human erythrocyte; transglutaminase and cell activation: the thrombin-stimulated human platelet and the fertilized sea urchin egg. |
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