Evidence map›Paper›PMID 16272417›Full record

ArticleGenetics2006

Fixation of the human-specific CMP-N-acetylneuraminic acid hydroxylase pseudogene and implications of haplotype diversity for human evolution.

Toshiyuki Hayakawa, Ikuko Aki, Ajit Varki, Yoko Satta, Naoyuki Takahata

Abstract read
In one paragraph

Article in Genetics, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
–field-weighted citation impact
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

42 citing papers in PubMed.

  1. Review
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  12. Human species-specific loss of CMP-Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  13. Article
  14. Article
  15. Article
  16. Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  17. Review
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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

5 authors.

Toshiyuki HayakawaDepartment of Biosystems Science, Graduate University for Advanced Studies (Sokendai), Hayama, Kanagawa, Japan.
Ikuko Aki
Ajit Varki
Yoko Satta
Naoyuki Takahata

Funding

BIOSYNTHESIS AND REGULATION OF SUBSTITUTED SIALIC ACIDSR01GM032373 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI VARKI, AJIT P · 1985 to 2022
$6.9M
BIOLOGY OF SIALIC ACIDS AND THEIR SUBSTITUTIONSR37GM032373 · NIGMS · UNIVERSITY OF CALIFORNIA SAN DIEGO · PI VARKI, AJIT P · 1995 to 2004
$1.8M
NIGMS NIH HHS GM32373NIGMS NIH HHS R01 GM032373NIGMS NIH HHS R37 GM032373
6 · The paper itself

Abstract

The human CMP-N-acetylneuraminic acid hydroxylase gene (CMAH) suffered deletion of an exon that encodes an active center for the enzyme approximately 3.2 million years ago (MYA). We analyzed a 7.3-kb intronic region of 132 CMAH genes to explore the fixation process of this pseudogene and the demographic implication of its haplotype diversity. Fifty-six variable sites were sorted into 18 different haplotypes with significant linkage disequilibrium. Despite the rather low nucleotide diversity, the most recent common ancestor at CMAH dates to 2.9 MYA. This deep genealogy follows shortly after the original exon deletion, indicating that the deletion has fixed in the population, although whether this fixation was facilitated by natural selection remains to be resolved. Remarkable features are exceptionally long persistence of two lineages and the confinement of one lineage in Africa, implying that some African local populations were in relative isolation while others were directly involved in multiple African exoduses of the genus Homo. Importantly, haplotypes found in Eurasia suggest interbreeding between then-contemporaneous human species. Although population structure within Africa complicates the interpretation of phylogeographic information of haplotypes, the data support a single origin of modern humans, but not with complete replacement of archaic inhabitants by modern humans.

Indexed as

Evolution, MolecularHaplotypesPseudogenesAnimalsDemographyGenetic VariationGorilla gorillaHumansLinkage DisequilibriumMixed Function OxygenasesMolecular Sequence DataPan troglodytesPolymorphism, GeneticCMPacetylneuraminate monooxygenaseMixed Function Oxygenases

Identifiers

PMID16272417
PMCPMC1456212

What OpenQuestion holds

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Registered trials

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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.