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The major histocompatibility complex and human evolution.

J Klein1, J Gutknecht, N Fischer

  • 1Max-Planck Institut Für Biologie, Abteilung Immungenetik, Tübingen, FRG.

Trends in Genetics : TIG
|January 1, 1990
PubMed
Summary
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Ancient human major histocompatibility complex (HLA) alleles suggest a large founding population for Homo. This indicates a minimum of ten, likely over 10,000, individuals in the human genus origin.

Area of Science:

  • Evolutionary biology
  • Human genetics
  • Paleoanthropology

Background:

  • The human major histocompatibility complex (HLA) contains highly polymorphic genes crucial for immune response.
  • Genetic diversity within HLA loci provides insights into human evolutionary history and population dynamics.

Purpose of the Study:

  • To investigate the evolutionary history of human major histocompatibility complex (HLA) alleles.
  • To estimate the minimum founding population size of the genus Homo based on HLA allele divergence.

Main Methods:

  • Comparative analysis of human and great ape HLA allele sequences.
  • Phylogenetic reconstruction to determine allele divergence times.

Main Results:

  • Many human HLA alleles predated the divergence of humans and great apes.

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  • This suggests a significant ancestral population size for the genus Homo.

    • Conclusions:

    • The genus Homo was founded by a population substantially larger than previously estimated.
    • HLA genetic diversity offers a powerful tool for understanding early human population bottlenecks.