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首页> 外文期刊>Plant physiology >Expression profiling and bioinformatic analyses of a novel stress-regulated multispanning transmembrane protein family from cereals and Arabidopsis
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Expression profiling and bioinformatic analyses of a novel stress-regulated multispanning transmembrane protein family from cereals and Arabidopsis

机译：谷物和拟南芥中一个新的应激调控跨膜蛋白家族的表达谱和生物信息学分析

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摘要

Cold acclimation is a multigenic trait that allows hardy plants to develop efficient tolerance mechanisms needed for winter survival. To determine the genetic nature of these mechanisms, several cold-responsive genes of unknown function were identified from cold-acclimated wheat (Triticum aestivum). To identify the putative functions and structural features of these new genes, integrated genomic approaches of data mining, expression profiling, and bioinformatic predictions were used. The analyses revealed that one of these genes is a member of a small family that encodes two distinct groups of multisparming transmembrane proteins. The cold-regulated (COR)413-plasma membrane and COR413-thylakoid membrane groups are potentially targeted to the plasma membrane and thylakoid membrane, respectively. Further sequence analysis of the two groups from different plant species revealed the presence of a highly conserved phosphorylation site and a glycosylphosphatidylinositol-anchoring site at the C-terminal end. No homologous sequences were found in other organisms suggesting that this family is specific to the plant kingdom. Intraspecies and interspecies comparative gene expression profiling shows that the expression of this gene family is correlated with the development of freezing tolerance in cereals and Arabidopsis. In addition, several members of the family are regulated by water stress, light, and abscisic acid. Structure predictions and comparative genome analyses allow us to propose that the cor413 genes encode putative G-protein-coupled receptors.
机译：冷驯化是一种多基因性状，可使强壮的植物发展出冬季生存所需的有效耐受机制。为了确定这些机制的遗传性质，从冷驯化的小麦（Triticum aestivum）中鉴定了几个功能未知的冷响应基因。为了确定这些新基因的假定功能和结构特征，使用了数据挖掘，表达谱分析和生物信息学预测的综合基因组方法。分析表明，这些基因之一是一个小家族的成员，该家族编码两组不同的多分散跨膜蛋白。冷调节的（COR）413-质膜和COR413-类囊体膜分别潜在地靶向质膜和类囊体膜。来自不同植物物种的两组的进一步序列分析显示，在C末端存在高度保守的磷酸化位点和糖基磷脂酰肌醇固定位点。在其他生物中未发现同源序列，表明该家族对植物界具有特异性。种内和种间比较基因表达谱显示该基因家族的表达与谷物和拟南芥中抗冻性的发展相关。另外，该家庭的几个成员受到水分胁迫，光照和脱落酸的调节。结构预测和比较基因组分析使我们能够提出cor413基因编码假定的G蛋白偶联受体。

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