Molecular Biology and Evolution, Vol 14, 942-950, Copyright © 1997 by Society for Molecular Biology and Evolution
N Inomata, H Tachida and T Yamazaki
Molecular evolution of the Amy multigenes in Drosophila was investigated
using PCR amplification. Twenty-five partial Amy sequences from 13 species
belonging mainly to the subgenus Sophophora were determine, and a molecular
phylogeny of the Amy genes in Drosophila was constructed, together with
published Amy sequences. Clustering of species are mostly consistent with
the traditional classification and that inferred from other genes. From
sequence divergence between PCR products, several species, including D.
elegans and D. fuyamai, were suggested to have multiple copies of the Amy
genes. The loss of an intron took place at least three times after the
Sophophora radiation. In order to investigate the mechanism of sequence
evolution, the numbers of amino acid replacement and synonymous
substitutions in five lineages were estimated. The heterogeneity in the
relative numbers of synonymous and replacement substitutions among the
lineages was found. Possible roles of selection in the sequence evolution
of the Amy gene are discussed.
ORIGINAL ARTICLE
Molecular evolution of the Amy multigenes in the subgenus Sophophora of Drosophila [published erratum appears in Mol Biol Evol 1997 Dec;14(12):1338]
Department of Biology, Faculty of Science, Kyushu University, Fukuoka, Japan.
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