Evidence map›Paper›PMID 32963319›Full record

ArticleScientific reports2020

The distinctive geographic patterns of common pigmentation variants at the OCA2 gene.

Kenneth K Kidd, Andrew J Pakstis, Michael P Donnelly, Ozlem Bulbul, Lotfi Cherni, Cemal Gurkan, Longli Kang, Hui Li, Libing Yun, Peristera Paschou and 3 more

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.1field-weighted citation impact, top 25% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed, 20 citations in OpenAlex.

  1. Trial
  2. SLC16A6 is a tyrosine transporter for the melanosome.bioRxiv : the preprint server for biology · 2026
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  10. Why humans evolved blue eyes.Frontiers in psychology · 2025
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  11. Identification of Polymorphisms in theThe journal of poultry science · 2023
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  12. Prediction and association analyses of skin phenotypes in Japanese females using genetic, environmental, and physical features.Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2023
    Article
  13. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 9 institutions in 5 countries.

Kenneth K KiddProfessor Emeritus, Department of Genetics, Yale University School of Medicine, P.O. Box 208005, New Haven, CT, 06520-8005, USA. Kenneth.Kidd@yale.edu.
Andrew J PakstisProfessor Emeritus, Department of Genetics, Yale University School of Medicine, P.O. Box 208005, New Haven, CT, 06520-8005, USA.
Michael P DonnellyProfessor Emeritus, Department of Genetics, Yale University School of Medicine, P.O. Box 208005, New Haven, CT, 06520-8005, USA.
Ozlem BulbulInstitute of Forensic Science, Istanbul University-Cerrahpasa, Istanbul, 34500, Turkey.
Lotfi CherniLaboratory of Genetics, Immunology and Human Pathologies, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092, Tunis, Tunisia.
Cemal GurkanTurkish Cypriot DNA Laboratory, Committee on Missing Persons in Cyprus Turkish Cypriot Member Office, Nicosia, North Cyprus), Turkey.
Longli KangKey Laboratory forMolecular GeneticMechanisms and Intervention Research On High Altitude Disease of Tibet Autonomous Region, School of Medicine, Xizang Minzu University, Xianyang, 712082, Shaanxi, China.
Hui LiMOE State Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.
Libing YunInstitute of Forensic Medicine, West China College of Preclinical and Forensic Medicine, Sichuan University, No.16. Section 3. RenMin Nan Road, Chengdu, 610041, Sichuan, China.
Peristera PaschouDepartment of Biological Sciences, Purdue University, West Lafayette, IN, USA.
Kelly A MeiklejohnDepartment of Population Health and Pathobiology, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA.
Eva HaighProfessor Emeritus, Department of Genetics, Yale University School of Medicine, P.O. Box 208005, New Haven, CT, 06520-8005, USA.
William C SpeedProfessor Emeritus, Department of Genetics, Yale University School of Medicine, P.O. Box 208005, New Haven, CT, 06520-8005, USA.
Yale University · USEastern Mediterranean University · CYFudan University · CNIstanbul University-Cerrahpaşa · TRNorth Carolina State University · USPurdue University West Lafayette · USSichuan University · CNTunis University · TNXizang Minzu University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Oculocutaneous Albinism type 2 (OCA2) is a gene of great interest because of genetic variation affecting normal pigmentation variation in humans. The diverse geographic patterns for variant frequencies at OCA2 have been evident but have not been systematically investigated, especially outside of Europe. Here we examine population genetic variation in and near the OCA2 gene from a worldwide perspective. The very different patterns of genetic variation found across world regions suggest strong selection effects may have been at work over time. For example, analyses involving the variants that affect pigmentation of the iris argue that the derived allele of the rs1800407 single nucleotide polymorphism, which produces a hypomorphic protein, may have contributed to the previously demonstrated positive selection in Europe for the enhancer variant responsible for light eye color. More study is needed on the relationships of the genetic variation at OCA2 to variation in pigmentation in areas beyond Europe.

Indexed as

AllelesEuropeEye ColorGenotypeHumansIrisMembrane Transport ProteinsPigmentationPolymorphism, Single NucleotideMembrane Transport ProteinsOCA2 protein, human

Identifiers

PMID32963319
PMCPMC7508881
OpenAlexW3088039331

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.