کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10872560 | 1074179 | 2007 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Where do animal α-amylases come from? An interkingdom trip
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Alpha-amylases are widely found in eukaryotes and prokaryotes. Few amino acids are conserved among these organisms, but at an intra-kingdom level, conserved protein domains exist. In animals, numerous conserved stretches are considered as typical of animal α-amylases. Searching databases, we found no animal-type α-amylases outside the Bilateria. Instead, we found in the sponge Reniera sp. and in the sea anemone Nematostella vectensis, α-amylases whose most similar cognate was that of the amoeba Dictyostelium discoideum. We found that this “Dictyo-type” α-amylase was shared not only by these non-Bilaterian animals, but also by other Amoebozoa, Choanoflagellates, and Fungi. This suggested that the Dictyo-type α-amylase was present in the last common ancestor of Unikonts. The additional presence of the Dictyo-type in some Ciliates and Excavates, suggests that horizontal gene transfers may have occurred among Eukaryotes. We have also detected putative interkingdom transfers of amylase genes, which obscured the historical reconstitution. Several alternative scenarii are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: FEBS Letters - Volume 581, Issue 21, 21 August 2007, Pages 3927-3935
Journal: FEBS Letters - Volume 581, Issue 21, 21 August 2007, Pages 3927-3935
نویسندگان
Jean-Luc Da Lage, Etienne G.J. Danchin, Didier Casane,