Cited by 76Circadian rhythm and melatoninGenetic diversity and population structureGenetic Associations and Epidemiology

Evolution of a Length Polymorphism in the Human PER3 Gene, a Component of the Circadian System

Nadkarni, Nachiket A., Weale, Michael E., von Schantz, Malcolm, Thomas, Mark G.·2005·Journal of Biological Rhythms

Abstract

Period homologue 3 ( PER3) is a component of the mammalian circa-dian system, although its precise role is unknown. A biallelic variable number tandem repeat (VNTR) polymorphism exists in human PER3, consisting of 4 or 5 repeats of a 54-bp sequence in a region encoding a putative phosphorylation domain. This polymorphism has previously been reported to associate with diurnal preference (“morningness” and “eveningness”) and delayed sleep-phase syndrome. We have investigated the global allele frequencies of this variant in ethnically distinct indigenous populations. All populations were polymorphic, with the shorter (4-repeat) allele ranging in frequency from 0.19 (Papua New Guinea) to 0.89 (Mongolia). To investigate if allele frequency has been influenced by natural selection, the authors 1) tested for a correlation with latitude and mean annual insolation (incident sunlight energy), using classical markers to correct for historical population differentiation; and they 2) compared allele-frequency difference between European American, African American, and East Asian populations, as measured using F ST , to an empirical null distribution of F ST values based on a genome-wide dataset of single nucleotide polymorphisms (SNPs) of presumed neutral loci that were previously typed by The SNP Consortium. The variation in allele frequencies between indigenous populations did not show a pattern that would indicate selective pressure on PER3resulting from day-length variation or mean annual insolation, and the allele-frequency difference between European Americans, African Americans, and East Asians was not an outlier when compared to the distribution for presumed neutral SNPs. We therefore find no evidence for differential or balancing selection in the contemporary pattern of global PER3allele frequencies.

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Crossref · 10.1177/0748730405281332

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  • The derived allele frequencies of all three pigmentation-associated SNPs increased between ancient Eneolithic/Bronze Age and modern Ukrainian samples from the same geographic region.

    “We also genotyped the three pigmentation-associated SNPs in a sample of 60 modern Ukrainians (28) and observed an increase in frequency of all derived alleles between the ancient and modern samples from the same geographic region (Table 1 and Fig. S1).”

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Authors
Nadkarni, N. A., Weale, M. E., von Schantz, M., & Thomas, M. G.
Affiliations
  • Hammersmith Hospital (GB)
  • University College London (GB)
  • Centre for Chronobiology, School of Biomedical and Molecular Sciences, University of Surrey, Guildford, United Kingdom
Venue
Journal of Biological Rhythms
Published
2005-12
Volume
20
Issue
6
Pages
490-499
ISSN
  • 0748-7304 (ISSN-L)
  • 1552-4531
OpenAlex
W1967981583
Cited by
76
References
30
Citations by year
2024: 1 · 2023: 1 · 2022: 2 · 2021: 3 · 2020: 1 · 2019: 1 · 2018: 5 · 2017: 5 · 2016: 2 · 2015: 5 · 2014: 9 · 2013: 1 · 2012: 12
FWCI
1.33
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Biological Rhythms (publishedVersion)
  • PubMed (publishedVersion)
  • Open Research (University of Surrey) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Surrey Research Insight Open Access (The University of Surrey) (submittedVersion)
  • Research Portal (King's College London) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
Per3, variable number tandem repeats, circadian system, allele frequency, natural selection, diurnal preference, delayed sleep phase syndrome, latitude, solar irradiation, genetic differentiation, F(ST), indigenous peoples, human genetic variation
MeSH terms
Circadian Rhythm, Gene Frequency, Humans, Nuclear Proteins, Polymorphism, Genetic, Selection, Genetic, Transcription Factors, Evolution, Molecular, Period Circadian Proteins

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