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Structure of Lipids

Structure of Lipids

Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic...

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Related Experiment Video

Updated: Sep 23, 2025

Formulation and Characterization of Bioactive Agent Containing Nanodisks

Formulation and Characterization of Bioactive Agent Containing Nanodisks

Published on: March 17, 2023

HDL Structure.

Siying Deng^1,2, Yangkai Xu^1,2, Lemin Zheng^3,4

¹The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences of Ministry of Education, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Health Science Center, Peking University, Beijing, China.

Advances in Experimental Medicine and Biology

|May 16, 2022

Summary

This summary is machine-generated.

High-density lipoprotein (HDL) comprises proteins and lipids, influencing its function in various physiological processes. Understanding HDL structure and components is key to its role in health and disease.

Keywords:

Apolipoprotein HDL Metabolism Structure

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Isolation of High-density Lipoproteins for Non-coding Small RNA Quantification

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Published on: November 28, 2016

Area of Science:

Biochemistry
Molecular Biology
Cardiovascular Science

Background:

High-density lipoprotein (HDL) is a complex particle with diverse protein and lipid components.
These constituents, including apolipoproteins and enzymes, dictate HDL's structure and multifaceted functions.
HDL plays critical roles in acute phase response, immune regulation, hemostasis, and protease inhibition.

Purpose of the Study:

To elucidate the structural components of HDL and their relationship to its biological functions.
To highlight the roles of specific apolipoproteins and enzymes within HDL.
To discuss the significance of lipid components and structural variations in HDL.

Main Methods:

Literature review of HDL composition and function.
Analysis of apolipoprotein, enzyme, and lipid roles in HDL metabolism.
Examination of structural variations like discoid and spherical HDL.

Main Results:

Apolipoprotein A-I (Apo A-I) is a major component, influencing atherogenic activities.
Other apolipoproteins (Apo A-II, C, D, F, H, J, O) modulate lipid binding, protein activity, and coagulation.
Key enzymes like LCAT, paraoxonase (PON1, PON2, PON3), and PAF-AH are crucial for cholesterol esterification and lipoprotein metabolism.
Phospholipids (e.g., PC) and sphingolipids (sphingomyelin, ceramide) are vital lipid components.
HDL exhibits structural plasticity, forming discoid and spherical (rHDL) particles.

Conclusions:

HDL's functional repertoire is determined by its intricate protein and lipid composition.
Specific apolipoproteins and enzymes contribute to HDL's diverse physiological roles.
Lipid composition and structural adaptability are essential for HDL's dynamic function in various conditions.