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#lipid storage

2 public questions tagged with this topic.

Glycolipid and Phospholipid

Which statement about lipid droplets is correct?

Lipid droplets defy classic bilayer vesicle definition possessing neutral core surrounded by monolayer explaining unique buoyancy density microscopy appearance. Emergence begins when DGAT1 DGAT2 synthesize triacylglycerol DAG acyl CoA ACAT1 ACAT2 forms cholesteryl ester accumulating between ER leaflets forming oil lens twenty to sixty nanometers growing via Ostwald ripening coalescence regulated Seipin LDAF1 perilipin recruitment. Lens buds toward cytosol coated phospholipid monolayer enriched PC PE lyso PC preventing coalescence decorated perilipin family PLIN1 five CIDE proteins Seipin Rab18

Ref: Walther TC & Farese RV, Annu Rev Biochem 2012, Lipid droplets neutral lipid storage monolayer organization and functions.

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Cell Organelles

Which plastid stores lipids?

Plastid diversity reflects differentiation of proplastids in meristems according to tissue identity and developmental signals regulated by light, hormones and transcription factors. Elaioplasts are specialized non-photosynthetic leucoplasts lacking chlorophyll that function in lipid storage and metabolism crucial for reproduction. They are abundant in oil seeds like Brassica, citrus exocarp oil glands, and anther tapetum where lipid reserves for pollen coat tryphine formation and pollinator attraction are needed. Ultrastructurally they contain numerous electron-dense plastoglobuli and oil drop

Ref: Wise & Hoober, The Structure and Function of Plastids, Chapter 9: Classification of Leucoplasts and Elaioplasts.

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