Sterol Regulatory Element Binding Proteins (SREBPs): Controllers of lipid synthesis and cellular uptake

Research output: Contribution to journalArticle

Abstract

Mammalian cells use an exquisitely sensitive mechanism to control the amount of cholesterol and fatty acids in their membranes. This process relies on a feedback system that adjusts the rates of transcription of genes encoding the low density lipoprotein receptor and multiple enzymes in the cholesterol and fatty acid biosynthetic pathways. When cellular cholesterol levels are depleted, these genes are all transcribed in abundant amounts, and their transcription is repressed when sterols build up within the cell. Until recently, the mechanism of this regulation was elusive. How do cells sense the level of a membrane-embedded lipid such as cholesterol and how is this information transmitted to the nucleus where gene transcription is regulated? Answers are now beginning to emerge from the study of a newly discovered family of transcription-regulating proteins called sterol regulatory element binding proteins.1.

Original languageEnglish (US)
JournalScandinavian Journal of Nutrition/Naringsforskning, Supplement
Issue number33
StatePublished - Feb 1998

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Sterol Regulatory Element Binding Proteins
controllers
sterols
binding proteins
transcription (genetics)
Cholesterol
cholesterol
uptake mechanisms
Lipids
synthesis
lipids
Fatty Acids
Genes
fatty acids
genes
LDL Receptors
Biosynthetic Pathways
Sterols
cells
low density lipoprotein

ASJC Scopus subject areas

  • Food Science
  • Medicine (miscellaneous)

Cite this

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abstract = "Mammalian cells use an exquisitely sensitive mechanism to control the amount of cholesterol and fatty acids in their membranes. This process relies on a feedback system that adjusts the rates of transcription of genes encoding the low density lipoprotein receptor and multiple enzymes in the cholesterol and fatty acid biosynthetic pathways. When cellular cholesterol levels are depleted, these genes are all transcribed in abundant amounts, and their transcription is repressed when sterols build up within the cell. Until recently, the mechanism of this regulation was elusive. How do cells sense the level of a membrane-embedded lipid such as cholesterol and how is this information transmitted to the nucleus where gene transcription is regulated? Answers are now beginning to emerge from the study of a newly discovered family of transcription-regulating proteins called sterol regulatory element binding proteins.1.",
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