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Nucleotide sequence of the canine alphaIIb gene from platelet-derived cDNA
D L Lipscomb1, C Bourne, M K Boudreaux
1Department of Pathobiology, College of Veterinary Medicine, Auburn University, AL 36849, USA.
American Journal of Veterinary Research
|September 19, 2001
Summary
Researchers sequenced the canine alphaIIb gene, finding high similarity to human sequences, especially in calcium-binding domains. This suggests dogs are a good model for platelet disorder treatments.
Area of Science:
- Molecular Biology
- Genetics
- Comparative Genomics
Background:
- The alphaIIb gene encodes a subunit of the alphaIIbbeta3 integrin, crucial for platelet aggregation.
- Understanding canine alphaIIb is important for comparative studies and potential therapeutic applications in platelet disorders.
Purpose of the Study:
- To determine the complete nucleotide sequence of the alphaIIb gene from canine platelet-derived cDNA.
- To compare the canine alphaIIb sequence with its human counterpart.
Main Methods:
- Isolation of total RNA from platelets of 3 adult dogs.
- First-strand cDNA synthesis.
- Polymerase chain reaction (PCR) amplification using specific primers.
- Sequencing of purified PCR products.
Main Results:
- The nucleotide sequence of canine alphaIIb was determined, with a single variation noted at position 694, potentially indicating a polymorphism.
- Canine alphaIIb shares > or = 83% nucleotide and deduced amino acid sequence similarity with human alphaIIb.
- High sequence similarity (> or = 78%) was observed in functional domains, particularly the 4 calcium-binding domains, suggesting functional conservation.
- Key amino acid residues associated with alloantibody development in humans are absent in the canine sequence.
Conclusions:
- The identified nucleotide variation may represent a canine alphaIIb gene polymorphism.
- Species differences in alphaIIb sequence could influence receptor-ligand interactions.
- The conserved calcium-binding domains highlight their functional significance.
- Dogs serve as a suitable animal model for evaluating gene therapy and treatments for platelet-associated disorders due to clinical analogies with human diseases.
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