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人类转录效应域的大规模映射和突变发生

Nicole DelRosso¹, Josh Tycko², Peter Suzuki³

¹Biophysics Program, Stanford University, Stanford, CA, USA.

|April 5, 2023

概括

研究人员绘制了超过10万个蛋白质片段,以识别人类转录因子和染色质调节者的新激活和抑制域,从而推进基因表达控制.

科学领域:

分子生物学
遗传学
生物化学

背景情况:

人类的基因表达依赖于2000多种转录因子和染色体调节剂.
这些蛋白质中的效应器域控制基因激活或抑制.
许多效应域的确切功能,位置和序列要求仍然未知.

研究的目的:

系统地识别和描述人类转录因子和染色体调节者的效应域.
发现新的激活和抑制领域并阐明它们的功能序列.
为了解基因调节和基因表达工具提供全面的资源.

主要方法:

从2047个人类转录因子和染色质调节剂中对10万多个蛋白质片段进行系统选.
招募蛋白质片段到记者基因以测量它们的效应活性 (激活或抑制).
理性突变和删除扫描以确定域函数的基本序列.

主要成果:

标注了374个激活域和715个抑制域,其中约80%是新发现的.
确定了关键的残留物 (芳香物,白,酸性,氨酸,氨酸,谷氨酸) 对于激活域的功能至关重要.
发现的抑制域通常包含SUMOylation位点,核心压缩器相互作用动机或结构化的结合域.
发现能够同时激活和抑制基因表达的双功能域.

结论:

这种对效应域的系统注释和表征为基因调控研究提供了宝贵的资源.
这些发现有助于设计用于精确控制基因表达的新工具.
这项研究完善了效应域功能的预测模型,并增强了对转录因子和染色体调节者的理解.

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