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A novel human apolipoprotein (apoM).

N Xu1, B Dahlbäck

  • 1Department of Clinical Chemistry, University of Lund, University Hospital, Malmö, S-20502 Malmö, Sweden.

The Journal of Biological Chemistry
|October 26, 1999
PubMed
Summary
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Researchers identified a new human apolipoprotein, apolipoprotein M (apoM). This integral protein is found in high-density lipoproteins and may play a role in lipid transport.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Lipid Metabolism

Background:

  • Apolipoproteins are essential components of lipoproteins, facilitating lipid transport and metabolism.
  • The characterization of novel apolipoproteins is crucial for understanding lipoprotein function and associated diseases.

Purpose of the Study:

  • To identify and characterize a novel human apolipoprotein.
  • To determine the cellular localization and membrane association of the newly identified apolipoprotein.

Main Methods:

  • cDNA isolation and sequencing
  • Western blotting
  • In vitro translation with microsomes
  • High-speed centrifugation

Main Results:

Related Experiment Videos

  • A novel human apolipoprotein, apolipoprotein M (apoM), was identified with a unique N-terminal sequence.
  • apoM mRNA is expressed in the liver and kidney.
  • apoM is found in high-density lipoproteins (HDL), triglyceride-rich lipoproteins (TGRLP), and low-density lipoproteins (LDL).
  • apoM is an integral membrane protein, associated with the phospholipid layer of lipoproteins via a hydrophobic signal anchor.

Conclusions:

  • A novel human apolipoprotein, apoM, has been discovered.
  • apoM is an integral protein of lipoproteins, likely anchored by its signal peptide.
  • The specific function of apoM requires further investigation.