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Updated: Jun 27, 2026

A High-Throughput Luciferase Assay to Evaluate Proteolysis of the Single-Turnover Protease PCSK9

A High-Throughput Luciferase Assay to Evaluate Proteolysis of the Single-Turnover Protease PCSK9

Published on: August 28, 2018

PCSK9: a convertase that coordinates LDL catabolism.

Jay D Horton¹, Jonathan C Cohen, Helen H Hobbs

¹Department of Internal Medicine, The Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA. jay.horton@utsouthwestern.edu

Journal of Lipid Research

|November 21, 2008

Summary

Proprotein convertase subtilisin-like/kexin type 9 (PCSK9) regulates LDL metabolism. Loss-of-function mutations in PCSK9 reduce LDL cholesterol, offering protection against coronary heart disease (CHD).

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LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

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Published on: November 17, 2018

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A High-Throughput Luciferase Assay to Evaluate Proteolysis of the Single-Turnover Protease PCSK9

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Published on: August 28, 2018

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

Published on: November 17, 2018

Area of Science:

Biochemistry
Cardiovascular Science
Genetics

Background:

Low-density lipoprotein (LDL) cholesterol is a key risk factor for coronary heart disease (CHD).
Understanding LDL metabolism is crucial for developing effective cardiovascular disease (CVD) prevention strategies.
The identification of novel genetic factors influencing LDL cholesterol levels can provide therapeutic targets.

Purpose of the Study:

To elucidate the role of proprotein convertase subtilisin-like/kexin type 9 (PCSK9) in LDL metabolism.
To investigate the impact of PCSK9 on LDL receptor degradation.
To assess the therapeutic potential of targeting PCSK9 for CHD prevention.

Main Methods:

Characterization of PCSK9 protein function.
Analysis of PCSK9 interaction with the LDL receptor.
Evaluation of plasma LDL cholesterol levels in individuals with PCSK9 mutations.

Main Results:

PCSK9 is a secreted protease that promotes LDL receptor degradation.
Loss-of-function mutations in PCSK9 lead to reduced plasma LDL cholesterol levels.
Individuals with PCSK9 loss-of-function mutations exhibit protection from coronary heart disease (CHD).

Conclusions:

PCSK9 plays a critical role in regulating LDL cholesterol homeostasis.
PCSK9 is a validated therapeutic target for managing hypercholesterolemia and preventing CHD.
Targeting PCSK9 offers a promising new avenue for cardiovascular disease treatment and prevention.