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首页> 美国卫生研究院文献>Plant Signaling Behavior >Phylogenetic analysis of GRAS proteins from moss lycophyte and vascular plant lineages reveals that GRAS genes arose and underwent substantial diversification in the ancestral lineage common to bryophytes and vascular plants
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Phylogenetic analysis of GRAS proteins from moss lycophyte and vascular plant lineages reveals that GRAS genes arose and underwent substantial diversification in the ancestral lineage common to bryophytes and vascular plants

机译：对来自苔藓苔藓植物和维管植物谱系的GRAS蛋白进行系统进化分析表明GRAS基因在苔藓植物和维管植物常见的祖传谱系中出现并经历了广泛的分化

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摘要

GRAS genes are a large family of streptophyte specific transcription factors that function in a diverse set of physiological and developmental processes. GRAS proteins of the HAIRY MERISTEM (HAM) sub-family are required for maintenance of shoot and root indeterminacy. The transcriptional targets of HAM proteins and the signaling inputs regulating HAM activity are completely unknown. Understanding the relationship of HAM proteins to other members of the GRAS family may inform hypotheses relating to cellular level HAM functions. Here I report a phylogenetic analysis of GRAS proteins employing the complete set of known and probable GRAS proteins from the sequenced genomes of the flowering plants Arabidopsis and Rice, the lycophyte Selaginella moellendorffii, and the bryophyte Physcomitrella patens. HAM proteins are most closely related to DELLA proteins, key components of gibberellin perception. However, GRAS proteins diversified into a minimum of 12 discreet monophyletic lineages, including the HAM and DELLA subfamilies, prior to divergence of the moss and flowering plant lineages. Substantial diversification of GRAS proteins at so early a point in land plant evolution suggests that relative relatedness among GRAS protein sub-families may not substantially reflect shared protein function.
机译：GRAS基因是链霉菌特异转录因子的一大家族，可在多种生理和发育过程中起作用。维持苗和根不确定性需要HAIRY MERISTEM（HAM）子家族的GRAS蛋白。 HAM蛋白的转录靶标和调节HAM活性的信号输入完全未知。了解HAM蛋白与GRAS家族其他成员之间的关系可能会为有关细胞水平HAM功能的假设提供依据。在这里，我报告了GRAS蛋白的系统发育分析，该蛋白使用了全套的已知和可能的GRAS蛋白，这些蛋白来自开花植物拟南芥和水稻，苔藓植物卷柏（Selaginella moellendorffii）和苔藓植物Physcomitrella patens的测序基因组。 HAM蛋白与DELLA蛋白（赤霉素感知的关键成分）关系最密切。但是，在苔藓和开花植物谱系发散之前，GRAS蛋白至少分为12个离散的单系谱系，包括HAM和DELLA亚科。在陆地植物进化的早期，GRAS蛋白质的大量多样化表明，GRAS蛋白质亚家族之间的相对相关性可能基本上无法反映出共享的蛋白质功能。

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