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A phylogeny of Drosophilidae using the Amyrel gene: questioning the Drosophila melanogaster species group boundaries
TLDR
The phylogenetic relationships of 164 species of the family Drosophilidae are discussed, using the Amyrel gene, a member of the a-amylase multigene family, to raise the species subgroups ananassae and montium to the rank of species group and restrict the melanogaster species group to the melanogsaster subgroup plus the Oriental subgroups. Expand
Phylogeny and the Evolution of the Amylase Multigenes in the Drosophila montium Species Subgroup
TLDR
The evolutionary forces that have affected silent sites of the two Amy-type genes in the montium species subgroup may differ, suggesting that relationships among the Amy genes may be different from those among species due to their particular evolution. Expand
The acquisition of competence to respond to ecdysone in Drosophila is transcript specific
TLDR
The steroid hormone ecdysone induces a precise sequence of gene activity in Drosophila melanogaster salivary glands in late third larval instar larvae, revealing the complexity of the processes underlying the establishment of a hormonal response. Expand
The Amylases of Insects
TLDR
The multicopy feature of insect amylases appears to allow tissue-specific or stage-specific regulation, but also to broaden enzymological abilities, such as pH range, and to overcome plant inhibitory defenses. Expand
Variation in sex-, stage- and tissue-specific expression of the amylase genes in Drosophila ananassae
TLDR
It is suggested that the putative repressors of Amy1-2 might exhibit a geographical polymorphism, with a fixed active form in Pacific regions and a polymorphic pattern in Africa, thus increasing the diversity observed in adult amylase phenotypes. Expand
Distribution and evolution of introns in drosophila amylase genes
TLDR
Most species of Drosophilid insects contain an intron, with a variable size ranging from 50 to 750 bp, although the very majoritary size was around 60–80 bp. Expand
Research Article Horizontal gene transfer from Eukarya to Bacteria and domain shuffling: the a-amylase model
TLDR
This work screened the sequence databases for new occurrences of animal-like a-amylases and found three novel cases, which belong to unrelated bacterial phyla: Chloroflexus aurantiacus, Microbulbifer degra- and Three novel cases were found. Expand
Geographical polymorphism of amylase in Drosophila ananassae and its relatives
TLDR
African populations were much more polymorphic than those from the Far East, and showed multibanded phenotypes, suggesting a multiplication of the Amy structural gene, with at least four copies per haploid genome in certain populations. Expand
The role of ecdysone in the induction and maintenance of hsp27 transcripts during larval and prepupal development of Drosophila
TLDR
It is shown that the response of an EcRE varies during development and that the timing of the response cannot be predicted solely from its apparent strength in cell line analyses. Expand
How to remain nonfolded and pliable: the linkers in modular α‐amylases as a case study
TLDR
Molecular dynamics simulations suggest the existence of conformational transitions resulting from a transient and localized hydrophobic collapse, arising from the peculiar composition of the linkers, which should be regarded as fully disordered. Expand
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