Journal
VETERINARY PARASITOLOGY
Volume 110, Issue 1-2, Pages 123-129Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-4017(02)00332-1
Keywords
dog; Babesia gibsoni; heat shock protein 70; molecular cloning; phylogenetic analysis
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The Babesia gibsoni heat shock protein 70 gene (BGHsp70) was cloned by polymerase chain reaction (PCR) and sequenced. The length of the gene was 1938 bp and the predicted polypeptide was 646 amino acids long with a calculated molecular weight of 70,627. The amino acid sequences of BGHsp70 from 17 isolates were identical, though there were six types of polymorphisms among the corresponding nucleotide sequences. There was no intron in the BGHsp70 gene. Phylogenetic analysis of the amino acid sequence of Hsp70 showed that B. gibsoni was most closely related to B. bovis and lies within a phylogenetic cluster with Theileria. These results suggest that Hsp70 was well conserved among intraerythrocytic protozoa. (C) 2002 Elsevier Science B.V. All rights reserved.
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