Cited by 1,079Neurotransmitter Receptor Influence on BehaviorGenetic Associations and EpidemiologyPharmacogenetics and Drug Metabolism

A functional polymorphism in the monoamine oxidase A gene promoter

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Sabol, S. Z., Hu, Stella, Hamer, D.·1998·Human Genetics

Abstract

We describe a new polymorphism upstream of the gene for monoamine oxidase A (MAOA), an important enzyme in human physiology and behavior. The polymorphism, which is located 1.2 kb upstream of the MAOA coding sequences, consists of a 30-bp repeated sequence present in 3, 3.5, 4, or 5 copies. The polymorphism is in linkage disequilibrium with other MAOA and MAOB gene markers and displays significant variations in allele frequencies across ethnic groups. The polymorphism has been shown to affect the transcriptional activity of the MAOA gene promoter by gene fusion and transfection experiments involving three different cell types. Alleles with 3.5 or 4 copies of the repeat sequence are transcribed 2-10 times more efficiently than those with 3 or 5 copies of the repeat, suggesting an optimal length for the regulatory region. This promoter region polymorphism may be useful as both a functional and an anonymous genetic marker for MAOA.

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  • Many studies regard the 2 R, 3 R, and 5 R MAOA-uVNTR repeats as low activity variants (MAOA-L), and the 3.5 R and 4 R repeats as high activity variants (MAOA-H).

    “Many studies regard the 2 R, 3 R, and 5 R to be low activity variants (MAOA-L), and the 3.5 R and 4 R to be high activity variants (MAOA-H) [27].”

    From Genetics of child aggression, a systematic review (2024) · cites this paper as [27]

    “A VNTR upstream of MAOA” identifies 3, 3.5, 4, and 5 repeats, and “Effect on promoter function” reports higher transcription for the 3.5- and 4-repeat alleles than for the 3- and 5-repeat alleles. The paper does not identify or test a 2-repeat allele, so it does not support classifying 2R as low activity. It also reports its own experiments rather than establishing what many studies regard as the classification; page numbers were not available in the supplied copy. (LLM, conf=0.88)

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Authors
Sabol, S. Z., Hu, S., & Hamer, D.
Affiliations
National Institutes of Health (US)
Corresponding author
Hamer, D.
Venue
Human Genetics
Published
1998-09
Volume
103
Issue
3
Pages
273-279
ISSN
  • 0018-7348 (ISSN-L)
  • 0340-6717
  • 1432-1203
OpenAlex
W2158955275
Cited by
1,079
References
46
Citations by year
2026: 8 · 2025: 20 · 2024: 13 · 2023: 22 · 2022: 32 · 2021: 31 · 2020: 38 · 2019: 39 · 2018: 35 · 2017: 41 · 2016: 41 · 2015: 54 · 2014: 58 · 2013: 68 · 2012: 70
FWCI
4.85
Type
journal article
Language
en
Open access
Licence
Locations
  • Human Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Zenodo (CERN European Organization for Nuclear Research) (submittedVersion, public-domain)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
Keywords
monoamine oxidase A, MAOA gene, promoter polymorphism, linkage disequilibrium, allele frequency variation, ethnic differences, transcriptional activity, gene fusion, transfection, genetic markers, gene expression regulation
MeSH terms
Adult, Alleles, Female, Genetic Markers, Haplotypes, Humans, Genetic Linkage, Male, Middle Aged, Monoamine Oxidase, Polymorphism, Genetic, Promoter Regions, Genetic, Minisatellite Repeats

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