Systematic analysis of cotranscriptional RNA folding using transcription elongation complex display

Skyler L. Kelly and Eric J. Strobel ()
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Skyler L. Kelly: The University at Buffalo
Eric J. Strobel: The University at Buffalo

Nature Communications, 2025, vol. 16, issue 1, 1-21

Abstract: Abstract RNA can fold into structures that mediate diverse cellular functions. Understanding how RNA primary sequence directs the formation of functional structures requires methods that can comprehensively assess how changes in an RNA sequence affect its structure and function. Here we have developed a platform for performing high-throughput cotranscriptional RNA biochemical assays, called Transcription Elongation Complex display (TECdisplay). TECdisplay measures RNA function by fractionating a TEC library based on the activity of cotranscriptionally displayed nascent RNA. In this way, RNA function is measured as the distribution of template DNA molecules between fractions of the transcription reaction. This approach circumvents typical RNA sequencing library preparation steps that can cause technical bias. We used TECdisplay to characterize the transcription antitermination activity of >1 million variants of the Clostridium beijerinckii pfl ZTP riboswitch designed to perturb steps within its cotranscriptional folding pathway. Our findings establish TECdisplay as an accessible platform for high-throughput RNA biochemical assays.

Date: 2025
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DOI: 10.1038/s41467-025-57415-3

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