G
Genetic Archaeology
GENETIC ARCHAEOLOGY // PROFILE

APOA1

Apolipoprotein A1

CHR 11
11q23.3

Overview

APOA1 encodes apolipoprotein A1, the primary component of HDL particles (High-Density Lipoprotein). HDL is often referred to as ‘good cholesterol’ because it removes excess fat from the blood vessels.

📍 Chromosomal Position

11q23.3 (Chromosome 11)

🧬 Gene Category

Metabolism

🔬 Inheritance

Complex

📊 Prevalence

A allele ~15-25%

Function & Significance

APOA1 is crucial for regulating blood lipid levels and protecting blood vessels:

  • HDL Formation: It serves as the structural scaffold for the creation of HDL particles.
  • Reverse Cholesterol Transport: HDL collects cholesterol from peripheral tissues (e.g., arterial walls) and transports it back to the liver.
  • Vascular Protection: APOA1 has anti-inflammatory properties and protects against the oxidation of LDL (bad cholesterol).
  • Prevention: High levels are strongly associated with a lower risk of atherosclerosis and heart attacks.

💙 Why HDL is ‘good’

Think of HDL as the ‘garbage collection’ of the blood. While LDL brings cholesterol into the vessels, HDL (supported by APOA1) cleans it up. Efficient APOA1 thus ensures a clean ‘lane’ in your arteries.

🧬 Relevant SNPs

The G-75A variant (rs670) in the promoter region:

rs670
11:116706930
Allele 1

G

/

Allele 2

A

Significance: G-75A – This variant influences how effectively the gene is transcribed.

• GG (Wild type): Normal APOA1 production.

• AA / AG: Associated with higher APOA1 production and tendentially higher HDL levels.

🌟 Advantage of the A Allele

Carriers of the A allele (AG or AA) have often shown higher HDL values in studies. This is considered a protective factor for the cardiovascular system. Nevertheless, diet and lifestyle play a dominant role.

⚠️ Interaction with Fat Intake

Interestingly, some studies suggest that A-allele carriers respond particularly well to the replacement of saturated fats with unsaturated fats (e.g., Omega-3) to further optimize their HDL.

📚 Data Sources

  • OMIM: #107680 – Online Mendelian Inheritance in Man
  • dbSNP: rs670 – SNP Database (NCBI)
  • PubMed: Role of APOA1 in reverse cholesterol transport
  • National Human Genome Research Institute: Lipid Metabolism Genes

Last Update: February 2026

Biological Function

Apolipoprotein A1 is the primary protein component of HDL particles. It plays a central role in reverse cholesterol transport, a process where excess cholesterol is transported from tissues and artery walls back to the liver for excretion. APOA1 also has anti-inflammatory and antioxidant effects.

Associated Conditions

Tangier Disease Familial HDL Deficiency Cardiovascular Diseases Amyloidosis
Molecular Analysis

Analyzed Markers

rs670 Protective
Pos: 11:116706930 | Alleles: G/A

G-75A - A-allele: Associated with higher APOA1 levels and tends to correspond with higher HDL values ('good cholesterol').