Immunogenetics

, Volume 59, Issue 5, pp 427–431

Tempo and mode of evolution of the Rh blood group genes before and after gene duplication

  • Takashi Kitano
  • Kazuo Umetsu
  • Wei Tian
  • Kentaro Yamazaki
  • Naruya Saitou
Brief Communication

DOI: 10.1007/s00251-007-0204-z

Cite this article as:
Kitano, T., Umetsu, K., Tian, W. et al. Immunogenetics (2007) 59: 427. doi:10.1007/s00251-007-0204-z

Abstract

The Rh blood group genes became duplicated in a common ancestor of human–chimpanzee–gorilla. We compared the evolutionary rates of the Rh blood group genes for each exon for branches connecting to humans, having duplicated Rh loci, and to orangutan, gibbon, and Old World monkeys, species having a single Rh locus. Our results show that evolutionary rates of nonsynonymous substitutions at exon 7 became accelerated in the human lineage. Furthermore, we surveyed the sequence variation in the region surrounding exon 7 of gibbons to clarify whether the diversity of the human exon 7 was introduced after the duplication or had been maintained before it. Two amino acid polymorphisms in white-handed gibbons were observed in the immediate vicinity of the D-specific motif in the human exon 7. Although the evolutionary rate of exon 7 was accelerated after the gene duplication, our results suggest that exon 7 had the potential for change even before the gene duplication.

Keywords

Rh Blood Gibbon Primate Nucleotide diversity Evolutionary rate 

Supplementary material

251_2007_204_MOESM1_ESM.pdf (66 kb)
Supplementary Figure 1A neighbor-joining tree of primate Rh blood group genes. The mouse was used as an outgroup. Gene conversions in human, chimpanzee, and gorilla interrupt the orthologous relationship among the Rh duplicated genes (PDF 67 kb)
251_2007_204_MOESM2_ESM.pdf (23 kb)
Supplementary Table 1List of accession numbers for sequences of human, chimpanzee, and gorilla used to estimate diversities (PDF 23 kb)

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Takashi Kitano
    • 1
  • Kazuo Umetsu
    • 1
  • Wei Tian
    • 1
  • Kentaro Yamazaki
    • 1
  • Naruya Saitou
    • 2
  1. 1.Department of Experimental and Forensic PathologyYamagata University School of MedicineYamagataJapan
  2. 2.Division of Population GeneticsNational Institute of GeneticsMishimaJapan

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