Gene families and evolution of trehalose metabolism in plants

被引:138
作者
Lunn, John E. [1 ]
机构
[1] Max Planck Inst Mol Plant Physiol, D-14424 Potsdam, Germany
关键词
trehalose-phosphate synthase; trehalose-phosphatase; trehalase;
D O I
10.1071/FP06315
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The genomes of Arabidopsis thaliana L., rice (Oryza sativa L.) and poplar (Populus trichocarpa Torr. & A. Gray) contain large families of genes encoding trehalose-phosphate synthase (TPS) and trehalose-phosphatase (TPP). The class I subfamily of TPS genes encodes catalytically active TPS enzymes, and is represented by only one or two genes in most species. A. thaliana is atypical in having four class I TPS genes, three of which (AtTPS2-4) encode unusual short isoforms of TPS that appear to be found only in members of the Brassicaceae family. The class II TPS genes encode TPS-like proteins with a C-terminal TPP-like domain, but there is no experimental evidence that they have any enzymatic activity and their function is unknown. Both classes of TPS gene are represented in the genomes of chlorophyte algae (Ostreococcus species) and non-flowering plants [Physcomitrella patens (Hedw.) Bruch & Schimp.(B.S.G.) and Selaginella moellendorffii (Hieron. in Engl. & Prantl.)]. This survey shows that the gene families encoding the enzymes of trehalose metabolism are very ancient, pre-dating the divergence of the streptophyte and chlorophyte lineages. It also provides a frame of reference for future studies to elucidate the function of trehalose metabolism in plants.
引用
收藏
页码:550 / 563
页数:14
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