Evolution of a subtilisin-like protease gene family in the grass endophytic fungus Epichloë festucae.

Evolution of a subtilisin-like protease gene family in the grass endophytic fungus Epichloë festucae.
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DOI:
10.1186/1471-2148-9-168
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发表时间:
2009-07-19
影响因子:
3.4
通讯作者:
Scott B
Scott B
中科院分区:
生物学2区
文献类型:
--
作者:
Bryant MK;Schardl CL;Hesse U;Scott B

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类枯草杆菌蛋白酶(SLPs)构成了一个酶的超家族,其作用是降解蛋白质底物。在真菌中,SLPs可以起到一般的营养作用,或者在细胞代谢中发挥特定作用,或者作为致病性或毒力因子。 在禾本科植物内生真菌Epichloë festucae的基因组中鉴定出了15种不同的编码SLPs的基因。系统发育分析表明,这些SLPs属于4个不同的枯草杆菌蛋白酶家族:蛋白酶K、克新(kexin)、热解素和枯草杆菌蛋白酶。内含子丢失和获得的模式与这种系统发育情况相符。Epichloë festucae比较特殊,因为它含有两个克新样基因。在肉座菌目真菌中的系统发育分析揭示了基因丢失和复制的广泛历史。 这项研究为丝状真菌中SLP超家族的进化提供了新的见解。
Subtilisin-like proteases (SLPs) form a superfamily of enzymes that act to degrade protein substrates. In fungi, SLPs can play either a general nutritive role, or may play specific roles in cell metabolism, or as pathogenicity or virulence factors. Fifteen different genes encoding SLPs were identified in the genome of the grass endophytic fungus Epichloë festucae. Phylogenetic analysis indicated that these SLPs belong to four different subtilisin families: proteinase K, kexin, pyrolysin and subtilisin. The pattern of intron loss and gain is consistent with this phylogeny. E. festucae is exceptional in that it contains two kexin-like genes. Phylogenetic analysis in Hypocreales fungi revealed an extensive history of gene loss and duplication. This study provides new insights into the evolution of the SLP superfamily in filamentous fungi.
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