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      2. 植物病原絲狀真菌寄生性與RGS蛋白的關系研究
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        國家自然科學基金項目(31960314);云南省應用基礎研究計劃項目(2018FG001-028)


        Relationship between parasitism and RGS protein in plant pathogenic filamentous fungi
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          摘要:

          以49個全基因組序列已經公布的真菌為研究對象,通過OrthoVenn2同源基因簇比對、BLASTp比對和關鍵詞搜索3種方法對G蛋白信號調控因子(regulators of G-protein signaling,RGS)同源基因進行比對分析,并結合SMART進行保守結構域分析,結果發現,49個真菌中共有229個RGS蛋白,每種真菌中所含有RGS蛋白的數量范圍為3~9個,且死體營養型病原菌和半活體營養型病原菌的RGS蛋白數量高于活體營養型病原菌;根據RGS蛋白中保守結構域進行分類,可以劃分為DEP-RGS、RGS-TM、PXA-RGS-PX、RGS、RGS-PAS-PAC、TM-RGS等6種,其中,具有RGS-PAS-PAC和TM-RGS這2種特殊保守結構域的RGS蛋白主要集中在半活體營養型病原菌和死體營養型病原菌;進一步對229個RGS蛋白進行遺傳關系分析,發現具有同種保守結構域的RGS蛋白親緣關系較近。上述研究結果表明植物病原絲狀真菌的寄生性與RGS蛋白數量和種類之間存在著一定的關聯性。

          Abstract:

          Using 49 filamentous fungi with whole genome sequence published as the research objects,OrthoVenn2 homologous gene cluster alignment,BLASTp comparison,keyword search and SMART were used to analyze the homologous gene and conservative domain of regulators of G-protein signaling (RGS). The results showed that there were 229 RGS in the 49 fungi,the number of RGS in each fungus ranged from 3 to 9,and the number of RGS of the necrotrophs and hemibiotrophs fungi was higher than that of the biotrophs fungi. According to the conserve domains,the RGS proteins could be divided into six types,including DEP-RGS,RGS-TM,PXA-RGS-PX,RGS,RGS-PAS-PAC,and TM-RGS,of which RGS with two special conserved domains,RGS-PAS-PAC and TM-RGS,were mainly concentrated in the hemibiotrophs and necrotrophs fungi. Further genetic analysis showed that RGS proteins with the same conserved domain were closely related. The above results indicated that there was a certain correlation between the parasitism and the quantity and species of RGS protein in plant pathogenic filamentous fungi.

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        祝友朋,韓長志.植物病原絲狀真菌寄生性與RGS蛋白的關系研究[J].華中農業大學學報,2020,39(6):23-29

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        • 收稿日期:2020-01-08
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        • 在線發布日期: 2020-12-01
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