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Transglutaminases.

L Lorand, S M Conrad

    Molecular and Cellular Biochemistry
    |January 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Transglutaminases are enzymes that form protein cross-links. This review explores their biological roles, including cell aging and activation, and methods to study them.

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    Area of Science:

    • Biochemistry
    • Enzymology
    • Cell Biology

    Background:

    • Transglutaminases (TGases) are enzymes catalyzing the formation of gamma-glutamyl-epsilon-lysine cross-links.
    • These cross-links are crucial for protein structure and function in various biological processes.

    Purpose of the Study:

    • To provide a background on transglutaminases.
    • To focus on current understanding of their biological roles.
    • To discuss methods for studying TGase activity.

    Main Methods:

    • Review of existing literature on transglutaminase.
    • Discussion of enzyme kinetics and substrate interactions.
    • Exploration of assays for detecting TGase activity and cross-linking.
    • Examination of biological systems involving TGases.

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    Main Results:

    • Detailed discussion on the geometry and energetics of gamma-glutamyl-epsilon-lysine cross-links.
    • Analysis of amine incorporation assays, including artefactual incorporation.
    • Overview of synthetic substrate systems and TGase activity regulation.
    • Examples of TGase involvement in blood clotting, cell aging (erythrocytes), and cell activation (platelets, sea urchin eggs).

    Conclusions:

    • Transglutaminases play diverse and significant roles in cellular processes.
    • Understanding TGase mechanisms and regulation is key to deciphering their biological functions.
    • Further research is needed to fully elucidate TGase-mediated events in various biological systems.