1131-脊椎动物TGFβ信号通路的配体结合域演化 episode artwork

EPISODE · Jun 15, 2026 · 23 MIN

1131-脊椎动物TGFβ信号通路的配体结合域演化

from 聊聊Sci

这项研究揭示了在脊椎动物进化过程中,TGFβ受体家族通过一种此前未被察觉的配体结合域(LBD)独立重复机制,实现了信号传导的精准调控。研究人员在鱼类、两栖类、鸟类及哺乳动物中发现了12次独立的LBD加倍事件,这些结构创新打破了该信号通路在后生动物中高度保守的传统认知。通过对斑马鱼、鸡和马等物种的分析,研究表明新增的结构域可以增强受体对配体的捕获能力,或作为抑制模块来微调信号强度。这种结构可塑性不仅赋予了特定组织更灵活的生理调节手段,还为理解脊椎动物体型发育和内稳态的进化演变提供了全新的分子维度。研究进一步证实,这种结构域的增殖是脊椎动物在基因组倍增背景下,实现功能进化与多样化的重要途径。References:Knaus P, Jatzlau J, Kühlwein J, et al. Recurrent evolution of ligand-binding domain multiplicity fine-tunes TGFβ signaling in vertebrates[J]. 2026.前往小宇宙评论区与主播互动

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1131-脊椎动物TGFβ信号通路的配体结合域演化

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