G
Genetic Archaeology
GENETIC ARCHAEOLOGY // PROFILE

COMT

Catechol-O-Methyltransferase

CHR 22
22q11.21

Overview

COMT encodes an enzyme that degrades catecholamines such as dopamine, epinephrine, and norepinephrine, playing a major role in stress response and cognitive function.

📍 Chromosomal Position

22q11.21 (Chromosome 22)

🧬 Gene Category

Detoxification

🔬 Inheritance

Codominant

📊 Prevalence

~50% heterozygous

Function & Significance

The COMT enzyme catalyzes the degradation of catecholamines in the prefrontal cortex. The Val158Met variant significantly influences enzyme activity.

🧠 Warrior vs. Worrier

Met/Met (“Worrier”):

  • Slow dopamine breakdown
  • Better cognitive function (at baseline)
  • Lower stress tolerance
  • Higher anxiety risk

Val/Val (“Warrior”):

  • Fast dopamine breakdown
  • Better stress tolerance
  • Slightly reduced cognitive performance

🧬 Relevant SNPs

The Val158Met variant:

rs4680
22:19963748
Allele 1 (Val)

G

/

Allele 2 (Met)

A

Significance: Val158Met – influences dopamine degradation and stress response. G=Val (fast breakdown), A=Met (slow breakdown). Heterozygotes have balanced characteristics.

💡 Practical Implications

For Met/Met carriers:

  • Stress management is particularly important
  • Regular relaxation techniques
  • Caution with stimulants (caffeine)
  • Benefit from routine and structure

For Val/Val carriers:

  • Can benefit from cognitive challenges
  • Better performance under pressure
  • Possibly a higher need for mental stimulation

📚 Data Sources

The information on this page is based on the following scientific sources:

  • OMIM: #116790 – Online Mendelian Inheritance in Man
  • dbSNP: rs4680 – SNP Database (NCBI)
  • SNPedia: Val158Met Warrior/Worrier Research
  • ClinVar: Clinical Variant Database (NCBI)
  • PubMed: Neuroscience & Dopamine Metabolism Research

Last Update: February 2026

Associated Areas

  • 🧠 Cognitive Function

    Working memory, attention, executive functions

  • 😰 Anxiety & Stress

    Stress response, anxiety disorders

  • 💊 Pain Sensitivity

    Influences pain perception and processing

Biological Function

The COMT enzyme catalyzes the degradation of catecholamines in the prefrontal cortex. The Val158Met variant influences enzyme activity: Met/Met leads to slow degradation (higher dopamine levels, better cognitive function under normal conditions, but worse stress tolerance), while Val/Val leads to fast degradation (lower dopamine levels, better stress tolerance).

Associated Conditions

Increased risk for anxiety disorders (Met/Met) Pain sensitivity Fibromyalgia risk Parkinson's Disease (Risk Factor)
Molecular Analysis

Analyzed Markers

rs4680 Modifier
Pos: 22:19963748 | Alleles: G/A

Val158Met - Influences dopamine degradation and stress response (G=Val, A=Met)