ATP phosphoribosyltransferase from symbiont Entomomyces delphacidicola invovled in histidine biosynthesis of Nilaparvata lugens (Stal)

文献类型： 外文期刊

第一作者： Wan, Pin-Jun

作者： Wan, Pin-Jun;Tang, Yao-Hua;Yuan, San-Yue;Wang, Wei-Xia;Lai, Feng-Xiang;Fu, Qiang;Tang, Yao-Hua;Yu, Xiao-Ping

作者机构：

关键词： ATP;Phosphoribosyltransferase;Histidine biosynthesis;Entomomyces delphacidicola;Nilaparvata lugens

期刊名称：AMINO ACIDS （ 影响因子：3.52； 五年影响因子：3.6 ）

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收录情况： SCI

摘要： Histidine is an essential amino acid assumed to be synthesized by an obligatory yeast-like symbiont (Entomomyces delphacidicola str. NLU) in Nilaparvata lugens, an important rice pest. The adenosine-triphosphate phosphoribosyltransferase (ATP-PRTase) facilities the committed first step of the histidine biosynthesis pathway. In the current study, a putative ATP-PRTase was cloned and verified to be of E. delphacidicola origin (EdePRTase). The expression of the gene was spatial and temporal universal with a profile that matched the distribution of the fungal symbiont. RNA interference aided the knockdown of the EdePRTase-suppressed EdePRTase expression by 32-48 %. Hemolymph histidine level was also reduced followed by significant reduction of adult body weight. However, other performance characters including nymph development, survival, and adult sex ratio were not adversely affected by the knockdown. Furthermore, forced histidine exposure (through injection or feeding) significantly inhibited the EdePRTase mRNA levels at higher concentrations, but significantly increased EdePRTase expression levels at lower concentrations (feeding only). The significance of these findings support that the EdePRTase is from symbiont E. delphacidicola, and its involvement in histidine biosynthesis of N. lugens was discussed. The results provide a better understanding of EdePRTase and the encoded functional ATP-PRTase enzyme regulation in N. lugens and insects in general.

分类号： Q5`Q7

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