Efficient quantitative monitoring of translational initiation by RelE cleavage.
Efficient quantitative monitoring of translational initiation by RelE cleavage.
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DOI:
10.1093/nar/gkac614
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发表时间:
2022-10-14
影响因子:
14.9
通讯作者:
Strobel, Scott A.
中科院分区:
文献类型:
--
作者:
Focht, Caroline M.;Strobel, Scott A.
The sequences of the 5′ untranslated regions (5′-UTRs) of mRNA alter gene expression across domains of life. Transcriptional modulators can be easily assayed through transcription termination, but translational regulators often require indirect, laborious methods. We have leveraged RelE’s ribosome-dependent endonuclease activity to develop a quantitative assay to monitor translation initiation of cis-regulatory mRNAs. RelE cleavage accurately reports ligand-dependent changes in ribosome association for two translational riboswitches and provides quantitative information about each switch's sensitivity and range of response. RelE accurately reads out sequence-driven changes in riboswitch specificity and function and is quantitatively dependent upon ligand concentration. RelE cleavage similarly captures differences in translation initiation between yeast 5′-UTR isoforms. RelE cleavage can thus reveal a plethora of information about translation initiation in different domains of life.
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