Principles of gene regulation quantitatively connect DNA to RNA and proteins in bacteria.
Principles of gene regulation quantitatively connect DNA to RNA and proteins in bacteria.
复制标题
基因调控原理定量地将细菌中的 DNA 与 RNA 和蛋白质连接起来。
DOI:
10.1126/science.abk2066
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发表时间:
2022-12-09
期刊:
影响因子:
--
通讯作者:
Hwa T
中科院分区:
文献类型:
--
作者:
Balakrishnan R;Mori M;Segota I;Zhang Z;Aebersold R;Ludwig C;Hwa T
Protein concentrations are set by a complex interplay between gene-specific regulatory processes and systemic factors, including cell volume and shared gene expression machineries. Elucidating this interplay is crucial for discerning and designing gene regulatory systems. We quantitatively characterized gene-specific and systemic factors affecting transcription and translation genome-wide for E. coli across many conditions. The results revealed two design principles that make regulation of gene expression insulated from concentrations of shared machineries: RNA polymerase activity is fine-tuned to match translational output, and translational characteristics are similar across the majority of mRNAs. Consequently, in bacteria protein concentration is set primarily at the promoter level. A simple mathematical formula relates promoter activities and protein concentrations across growth conditions, enabling quantitative inference of gene regulation from ‘omics data. Coordinated transcription-translation fluxes and predominance of transcriptional control lead to a quantitative formulation of the Central Dogma in bacteria.
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