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茶樹賴氨酸和組氨酸轉(zhuǎn)運(yùn)蛋白家族的鑒定及其氮利用特性

 茶與生信 2023-02-07 發(fā)布于浙江

文獻(xiàn)

Abstract

    背景:In plants, the lysine and histidine transporter (LHT) family represent a class of proteins that mediate the uptake, translocation, and utilization of amino acids. The tea plant (Camellia sinensis) is a perennial evergreen with a relatively high level of amino acids. However, systematic identification and molecular characterization of the LHT gene family has rarely been reported in tea plants. 

結(jié)果:In this study, 22 CsLHTs were identified from the 'Shuchazao’ genome and classified into two groups. The modeled three-dimensional structure and the conserved domains presented a high similarity among the LHTs proteins. Moreover, it was predicted that a few genes were conserved through the analysis of the physiochemical characters, structures and cis-elements in promoters. The expression patterns in tea plants revealed that CsLHT7 was mainly expressed in the roots, and CsLHT4 and CsLHT11 exhibited relatively high expression in both the roots and leaves. Moreover, the expression of all three genes could be induced by organic nitrogen. Additionally, heterogeneous expression of CsLHT4, CsLHT7 and CsLHT11 in Arabidopsis thaliana decreased the aerial parts biomass compared with that in WT plants while significantly increased the rosette biomass only for CsLHT11 transgenic plants versus WT plants
結(jié)論:Overall, our results provide fundamental information about CsLHTs and potential genes in N utilization for further analysis in tea plants..

代表圖片

中文摘要

    在植物中,賴氨酸和組氨酸轉(zhuǎn)運(yùn)蛋白(LHT)家族是一類介導(dǎo)氨基酸攝取、轉(zhuǎn)運(yùn)和利用的蛋白質(zhì)。茶樹是一種多年生常綠植物,具有相對(duì)較高的氨基酸水平。然而,在茶樹中很少有關(guān)于LHT基因家族的系統(tǒng)鑒定和分子特征的報(bào)道。在這項(xiàng)研究中,從舒茶早基因組中鑒定出22個(gè)CsLHT,并將其分為兩組。建模的三維結(jié)構(gòu)和保守結(jié)構(gòu)域在LHTs蛋白中表現(xiàn)出高度的相似性。此外,通過(guò)對(duì)啟動(dòng)子的理化性質(zhì)、結(jié)構(gòu)和順式元件的分析和預(yù)測(cè),發(fā)現(xiàn)只有少數(shù)基因是保守的。茶樹中的表達(dá)模式表明,CsLHT7主要在根中表達(dá),而CsLHT4和CsLHT11在根和葉中都表現(xiàn)出相對(duì)高的表達(dá)。此外,有機(jī)氮可以誘導(dǎo)這三個(gè)基因的表達(dá)。與野生型植物相比,擬南芥中CsLHT4、CsLHT7和CsLHT11的異質(zhì)表達(dá)降低了地上部分的生物量,而僅CsLHT1轉(zhuǎn)基因植物與野生型相比顯著增加了蓮座生物量??偟膩?lái)說(shuō),我們的結(jié)果為茶樹中進(jìn)一步分析CsLHTs和潛在的氮利用基因提供了基礎(chǔ)信息。

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