Cited by 309Lipid metabolism and disordersCholesterol and Lipid MetabolismLipid metabolism and biosynthesis

Very-low-density lipoprotein assembly and secretion

Shelness, Gregory S., Sellers, Jeremy A.·2001·Current Opinion in Lipidology

Abstract

The assembly of apolipoprotein B (apoB) into VLDL is broadly divided into two steps. The first involves transfer of lipid by the microsomal triglyceride transfer protein (MTP) to apoB during translation. The second involves fusion of apoB-containing precursor particles with triglyceride droplets to form mature VLDL. ApoB and MTP are homologs of the egg yolk storage protein, lipovitellin. Homodimerization surfaces in lipovitellin are reutilized in apoB and MTP to achieve apoB-MTP interactions necessary for first step assembly. Structural modeling predicts a small lipovitellin-like lipid binding cavity in MTP and a transient lipovitellin-like cavity in apoB important for nucleation of lipid sequestration. The formation of triglyceride droplets in the endoplasmic reticulum requires MTP however, their fusion with apoB may be MTP-independent. Second step assembly is modulated by phospholipase D and A2. Phospholipases may prime membrane transport steps required for second step fusion and/or channel phospholipids into a pathway for VLDL triglyceride production. The enzymology of VLDL triglyceride synthesis is still poorly understood; however, it appears that ACAT2 is the sole source of cholesterol esters for VLDL and chylomicron assembly. VLDL production is controlled primarily at the level of presecretory degradation. Recently, it was discovered that the LDL receptor modulates VLDL production through its interactions with nascent VLDL in the secretory pathway.

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Crossref · 10.1097/00041433-200104000-00008

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67 of 67 references verified0 citation errors · 0 not checkable

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Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • About 95% of apoB binds to LDL particles, and each LDL particle binds to only one apoB molecule.

    “About 95% of apoB binds to LDL particles, and each LDL particle binds to only one apoB molecule [42].”

    From Effects of aerobic exercise on lipids and lipoproteins (2017) · cites this paper as [42]

  • ApoB is a major component of LDL particles and is essential for the removal of LDL particles in the circulation.

    “ApoB is a major component of LDL particles and is essential for the removal of LDL particles in the circulation.”

    From Effects of aerobic exercise on lipids and lipoproteins (2017) · cites this paper as [42]

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Authors
Shelness, G. S., & Sellers, J. A.
Affiliations
Wake Forest University Health Sciences (US)
Corresponding author
Shelness, Gregory S.
Venue
Current Opinion in Lipidology
Published
2001-04
Volume
12
Issue
2
Pages
151-157
ISSN
0957-9672 (ISSN-L)
OpenAlex
W1993281511
Cited by
309
References
66
Citations by year
2026: 8 · 2025: 5 · 2024: 9 · 2023: 11 · 2022: 7 · 2021: 9 · 2020: 16 · 2019: 3 · 2018: 12 · 2017: 14 · 2016: 7 · 2015: 6 · 2014: 10 · 2013: 9 · 2012: 13
FWCI
3.45
Type
journal article
Language
en
Open access
closed
Locations
  • Current Opinion in Lipidology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL 49373, P01HL049373)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
very low density lipoprotein assembly, apolipoprotein B, microsomal triglyceride transfer protein, lipovitellin, VLDL secretion, phospholipase D, phospholipase A2, ACAT2, cholesteryl ester synthesis, LDL receptor, chylomicron assembly, endoplasmic reticulum, lipoprotein secretion
MeSH terms
Animals, Apolipoproteins B, Carrier Proteins, Humans, Lipoproteins, VLDL, Phospholipases, Receptors, LDL, Triglycerides, Vitellogenins

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