COMT enzyme activity variant
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About COMT rs4680
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About COMT rs4680
Overview and History
COMT rs4680 (also called Val158Met) is a single nucleotide polymorphism in the COMT gene that changes one amino acid in the enzyme catechol-O-methyltransferase. The two common forms are referred to as Val (higher enzymatic activity) and Met (lower enzymatic activity); this variant has been widely studied for its effects on enzyme function and biochemical traits.
Biochemically, COMT transfers a methyl group to catechol substrates, using methyl donors to inactivate neurotransmitters like dopamine, norepinephrine and epinephrine and to modify catechol-derived estrogens. Variation in COMT activity influences how quickly these catechols are cleared and can shift demands on methylation pathways and related nutrient cofactors.
Interpreting Highs and Lows
In genetic terms, a “high” activity result (Val/Val) is associated with faster COMT enzyme function and more rapid methylation of catechols; this pattern can be linked to lower persistence of catechol neurotransmitters and a different profile of methyl donor demand. A “low” activity result (Met/Met) is associated with slower enzyme function, longer persistence of catechol compounds, and relatively greater reliance on methylation capacity. These are associations and should be interpreted alongside the Nutrient Zoomer’s biochemical measures and clinical context to understand overall nutrient status and metabolic patterns.
Featured Test
Nutrient Zoomer includes COMT rs4680 to connect inherited enzyme activity with real-time nutrient and metabolic data. The marker helps evaluate methylation load and catechol handling, adding genetic context to blood nutrient levels and supporting more precise interpretation of nutrient–gene interactions.
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Mary Beth Augustine
DCN, RDN, FAND- Lead Clinical Educator
Suzanne Barker
MS, RDN, LD, CTTS, CGP- Clinical Educator
Suzette Garcia
MSc- MHNE- Clinical Educator
Brooke Mader Ganev
MS, CNS, LDN, FDN- Clinical Educator
Adair Anderson
MS, RDN, LDN- Clinical Educator
Lillie Luu Nguyen
DCN, CNS, LDN- Clinical Educator
Jason Barker
ND- Clinical Educator
Emaline Brown
ND- Clinical Educator
Dana Filatova
DCN, CNS, LDN- Clinical Educator
Jessy Dhanjal
ND- Clinical Educator
Nour Amri
MS, LDN, CNS, CKNS- Clinical Educator
