Adding a further level of complexity to the regulation of transcription in response to light,certain light-regulated transcription factor families tend to form dimers,such as bHLH(basic helix-loop-helix) and bZIP(basic leucine zipper) families.Various degrees of homodimerization and heterodimerization suggest that these transcription factor families have the potential to participate in multiple sets of combinatorial interactions,endowing them with the capacity to function in the regulation of several transcriptional programmes.It is reasonable to suspect that such interactions are involved in integrating signals from different light signalling branches and from light and other factors, such as temperature.In addition,interactions between different families further extend the complexity of regulation.
光反应转录调控的复杂性进一步增加,某些光调节转录因子家族往往形成二聚体,如bHLH(碱性螺旋 - 环 - 螺旋)和bzip(碱性亮氨酸拉链)家族。不同程度的二聚体和异二聚体表明,这些转录因子家族有潜力参与多套组合的相互作用,赋予它们几个转录项目的调节能力。这种相互作用涉及来自不同光信令分支的集成信号和来自光和其他因子,如温度,是值得怀疑的。
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