Thromb Haemost 1998; 80(03): 449-456
DOI: 10.1055/s-0037-1615228
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Analysis of Platelet Glycoprotein Ia (α2 Integrin) Allele Frequencies in Three North American Populations Reveals Genetic Association between Nucleotide 807C/T and Amino Acid 505 Glu/Lys (HPA-5) Dimorphisms

Authors

  • Alexander P. Reiner

    1   From the Puget Sound Blood Center and Department of Medicine, University of Washington, Seattle, Washington, USA
  • Kaelen M. Aramaki

    1   From the Puget Sound Blood Center and Department of Medicine, University of Washington, Seattle, Washington, USA
  • Gayle Teramura

    1   From the Puget Sound Blood Center and Department of Medicine, University of Washington, Seattle, Washington, USA
  • Lakshmi Gaur

    1   From the Puget Sound Blood Center and Department of Medicine, University of Washington, Seattle, Washington, USA
Further Information

Publication History

Received 03 November 1997

Accepted after resubmission 27 May 1998

Publication Date:
08 December 2017 (online)

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Summary

Glycoprotein Ia (α2 integrin) is a subunit of the heterodimeric membrane complex (GPIa/IIa) that mediates platelet adhesion to collagen. Several nucleotide sequence variations of GPIa have been described. A nucleotide 1648 G/A dimorphism that leads to a Glu/Lys substitution at amino acid 505 is responsible for the human platelet antigen system, HPA-5. Recently, two other linked GPIa nucleotide dimorphisms involving codons Phe224 and Thr246 were identified: a C/T substitution at nucleotide 807 and a G/A substitution at nucleotide 873 (1). Using restriction enzyme digestion of amplified GPIa genomic DNA fragments (PCR-RFLP) to distinguish genotypes, we have determined the allele frequencies of the GPIa 807C/T and Glu/Lys505 dimorphisms in three North American populations, and a panel of non-human primates. Our results indicate a genetic relationship between the 807C/T and Glu/Lys505 dimorphisms that leads to an evolutionary model of GPIa isoforms.