Ancient origin of the null allele se428 of the human ABO-secretor locus (FUT2)

Yoshiro Koda, Hidenori Tachida, Mikiko Soejima, Osamu Takenaka, Hiroshi Kimura

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In human populations, a null allele having several nucleotide differences from the wild-type allele is segregating at the FUT2 locus (the ABO-Secretor locus) encoding α(1,2)fucosyltransferase. To estimate the age of the most recent common ancestor (MRCA) of these two alleles, we sequenced FUT2 homologues from chimpanzee, gorilla, orangutan, and green monkey. Since we did not detect acceleration or any heterogeneity in the substitution rate at this locus among these species, the age of the MRCA was estimated to be around 3 MYA, assuming the divergence time of human arid chimpanzee to be 5 MYA. We developed a simple test to examine whether or not the old age of the MRCA of the FUT2 is consistent with that expected for two divergent neutral alleles sampled from a random mating population. An application of the test to the data at FUT2 indicated that the age of the MRCA is too old to be explained by the simple neutral assumptions, although our test depends on accurate estimation of the divergence time of human and chimpanzee in units of twice the human population size. Various possibilities including balancing selection are discussed to explain this old age of the MRCA.

Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalJournal of Molecular Evolution
Volume50
Issue number3
DOIs
Publication statusPublished - Jan 1 2000

Fingerprint

null alleles
common ancestry
Pan troglodytes
allele
ancestry
Alleles
loci
alleles
human population
Pongo
Gorilla gorilla
Cercopithecus aethiops
divergence
Population Density
Pongo pygmaeus
random mating
Population
Gorilla
testing
Nucleotides

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

Cite this

Ancient origin of the null allele se428 of the human ABO-secretor locus (FUT2). / Koda, Yoshiro; Tachida, Hidenori; Soejima, Mikiko; Takenaka, Osamu; Kimura, Hiroshi.

In: Journal of Molecular Evolution, Vol. 50, No. 3, 01.01.2000, p. 243-248.

Research output: Contribution to journalArticle

Koda, Y, Tachida, H, Soejima, M, Takenaka, O & Kimura, H 2000, 'Ancient origin of the null allele se428 of the human ABO-secretor locus (FUT2)', Journal of Molecular Evolution, vol. 50, no. 3, pp. 243-248. https://doi.org/10.1007/s002399910028
Koda, Yoshiro ; Tachida, Hidenori ; Soejima, Mikiko ; Takenaka, Osamu ; Kimura, Hiroshi. / Ancient origin of the null allele se428 of the human ABO-secretor locus (FUT2). In: Journal of Molecular Evolution. 2000 ; Vol. 50, No. 3. pp. 243-248.
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