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  • Title: Protein-protein interactions regulate the activity of Adipose Triglyceride Lipase in intracellular lipolysis.
    Author: Kulminskaya N, Oberer M.
    Journal: Biochimie; 2020 Feb; 169():62-68. PubMed ID: 31404588.
    Abstract:
    Carefully regulated lipid homeostastis generates an optimal physiological, non-toxic environment. Imbalances in lipid metabolism lead to obesity and are associated with type-2 diabetes, hepatic steatosis, hypertension and cardiovascular disease. Mammals store energy in lipid droplets predominantly in white adipose tissue. This energy reservoir builds up during periods of energy excess and is mobilized during energy deprivation. Triacylglycerols (TAGs) are unable to cross cell membranes for cell nutrition; they have to be cleaved before further transportation within the body. Lipolysis describes the cleavage of TAG and is carried out with the help of lipases. Adipose triglyceride lipase (ATGL) catalyzes the first step of intracellular lipolysis to mobilize TAG stores. In this minireview, we set the focus on molecular mechanism and interfaces behind co-activation and inhibition of ATGL, namely via its regulation by the co-activating protein CGI-58, the inhibitory proteins G0S2 and HILPDA, as well as the regulatory effect of fatty acid binding proteins and the perilipin protein family.
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