Evidence map›Paper›PMID 10101176›Full record

ArticleGenetics1999

High polymorphism at the human melanocortin 1 receptor locus.

B K Rana, D Hewett-Emmett, L Jin, B H Chang, N Sambuughin, M Lin, S Watkins, M Bamshad, L B Jorde, M Ramsay and 2 more

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Genetics, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed, 1 pooled it
6.9field-weighted citation impact, top 3% 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

78 citing papers in PubMed, 1 synthesis or guideline pooled it, 284 citations in OpenAlex.

  1. Pooled it
  2. Unique Features of Melanoma Risk and Diagnosis in Red-Haired Populations.International journal of molecular sciences · 2026
    Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. Review
  14. Evolution, Prehistory and Vitamin D.International journal of environmental research and public health · 2020
    Review
  15. Asian Hair: A Review of Structures, Properties, and Distinctive Disorders.Clinical, cosmetic and investigational dermatology · 2020
    Review
  16. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2019
    Article
  17. Evolutionary Perspective in Rickets and Vitamin D.Frontiers in endocrinology · 2019
    Review
  18. Review
  19. MC1R: Front and Center in the Bright Side of Dark Eumelanin and DNA Repair.International journal of molecular sciences · 2018
    Review
  20. Marshaling the Translational Potential ofCancer prevention research (Philadelphia, Pa.) · 2018
    Article

18 more citing papers are in PubMed but not listed here.

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

12 authors at 6 institutions in 4 countries.

B K RanaHuman Genetics Center, School of Public Health and Graduate School of Biomedical Sciences, University of Texas, Houston, Texas 77030, USA.
D Hewett-Emmett
L Jin
B H Chang
N Sambuughin
M Lin
S Watkins
M Bamshad
L B Jorde
M Ramsay
T Jenkins
W H Li
The University of Texas Health Science Center at Houston · USUniversity of Utah · USArizona Research Center · USMackay Memorial Hospital · TWNational Health Laboratory Service · ZANational Public Health Laboratory · NP

Funding

STATISTICAL STUDIES OF DNA EVOLUTIONR37GM030998 · NIGMS · UNIVERSITY OF CHICAGO · PI LI, WEN-HSIUNG · 2000 to 2009
$1.9M
HUMAN DNA POLYMORPHISM AND EVOLUTIONR01GM055759 · NIGMS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI LI, WEN-HSIUNG · 1998 to 2001
$574k
STATISTICAL STUDIES OF DNA EVOLUTIONR01GM030998 · NIGMS · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI LI, WEN-HSIUNG · 1985 to 1999
–
NIGMS NIH HHS GM30998NIGMS NIH HHS GM55759
6 · The paper itself

Abstract

Variation in human skin/hair pigmentation is due to varied amounts of eumelanin (brown/black melanins) and phaeomelanin (red/yellow melanins) produced by the melanocytes. The melanocortin 1 receptor (MC1R) is a regulator of eu- and phaeomelanin production in the melanocytes, and MC1R mutations causing coat color changes are known in many mammals. We have sequenced the MC1R gene in 121 individuals sampled from world populations with an emphasis on Asian populations. We found variation at five nonsynonymous sites (resulting in the variants Arg67Gln, Asp84Glu, Val92Met, Arg151Cys, and Arg163Gln), but at only one synonymous site (A942G). Interestingly, the human consensus protein sequence is observed in all 25 African individuals studied, but at lower frequencies in the other populations examined, especially in East and Southeast Asians. The Arg163Gln variant is absent in the Africans studied, almost absent in Europeans, and at a low frequency (7%) in Indians, but is at an exceptionally high frequency (70%) in East and Southeast Asians. The MC1R gene in common and pygmy chimpanzees, gorilla, orangutan, and baboon was sequenced to study the evolution of MC1R. The ancestral human MC1R sequence is identical to the human consensus protein sequence, while MC1R varies considerably among higher primates. A comparison of the rates of substitution in genes in the melanocortin receptor family indicates that MC1R has evolved the fastest. In addition, the nucleotide diversity at the MC1R locus is shown to be several times higher than the average nucleotide diversity in human populations, possibly due to diversifying selection.

Indexed as

Polymorphism, GeneticAllelesAmino Acid SequenceAnimalsBase SequenceBlack PeopleConsensus SequenceDNADNA PrimersEvolution, MolecularGene FrequencyGenetic VariationHair ColorHumansMolecular Sequence DataPrimatesDNADNA PrimersReceptors, CorticotropinReceptors, Melanocortin

Identifiers

PMID10101176
PMCPMC1460552
OpenAlexW2128725994

What OpenQuestion holds

Texttitle and abstract
measurements read2
Read underepoch 390

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.