Dynamics of neutral lipid storage in yeast

• Autorzy: Mullner H. , Daum G.
• Języki publikacji: EN

Abstrakty

EN

Since energy storage is a basic metabolic process, the synthesis of neutral lipids oc­curs in all kingdoms of life. The yeast, Saccharomyces cerevisiae, widely accepted as a model eukaryotic cell, contains two classes of neutral lipids, namely steryl esters and triacylglycerols. Triacylglycerols are synthesized through two pathways gov­erned by the acyl-CoA diacylglycerol acyltransferase Dga1p and the phospholipid diacylglycerol acyltransferase Lro1p, respectively. Steryl esters are formed by the two steryl ester synthases Are1p and Are2p, two enzymes with overlapping function which also catalyze triacylglycerol formation, although to a minor extent. Storage of neutral lipids is tightly linked to the biogenesis of so called lipid particles. The role of this compartment in lipid homeostasis and its interplay with other organelles in­volved in neutral lipid dynamics, especially the endoplasmic reticulum and the plasma membrane, are subject of current investigations. In contrast to neutral lipid formation, mobilization of triacylglycerols and steryl esters in yeast are less characterized at the molecular level. Only recently, the triacylglycerol lipase Tgl3p was identified as the first yeast enzyme of this kind by function. Genes and gene products governing steryl ester mobilization still await identification. Besides biochemical properties of enzymes involved in yeast neutral lipid synthesis and degradation, regulatory aspects of these pathways and cell biological consequences of neutral lipid depletion will be discussed in this minireview.

Słowa kluczowe

EN

yeast; steryl ester; triacylglycerol; lipid particle; lipid storage; Saccharomyces cerevisiae

• Wydawca: -
• Czasopismo: Acta Biochimica Polonica
• Rocznik: 2004
• Tom: 51
• Numer: 2
• Opis fizyczny: p.323-347,fig.,ref.

Twórcy

autor

Mullner H.

• Technische Universitat Graz, Petersgasse 12-2, A-8010 Graz, Austria

autor

Daum G.

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