Decoupling transcription factor expression and activity enables dimmer switch gene regulation.
Decoupling transcription factor expression and activity enables dimmer switch gene regulation.
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解耦转录因子的表达和活性可以使调光基因调节。
DOI:
10.1126/science.aba7582
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发表时间:
2021-04-16
期刊:
影响因子:
--
通讯作者:
Springer M
中科院分区:
文献类型:
--
作者:
Ricci-Tam C;Ben-Zion I;Wang J;Palme J;Li A;Savir Y;Springer M
Gene-regulatory networks achieve complex mappings of inputs to outputs through mechanisms that are poorly understood. We found that in the galactose-responsive pathway in Saccharomyces cerevisiae, the decision to activate the transcription of genes encoding pathway components is controlled independently from the expression level, resulting in behavior resembling that of a mechanical dimmer switch. This was not a direct result of chromatin regulation or combinatorial control at galactose-responsive promoters; rather, this behavior was achieved by hierarchical regulation of the expression and activity of a single transcription factor. Hierarchical regulation is ubiquitous, and thus dimmer switch regulation is likely a key feature of many biological systems. Dimmer switch gene regulation may allow cells to fine-tune their responses to multi-input environments on both physiological and evolutionary time scales.
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