Comparison of Transcription Elongation Rates of Three RNA Polymerases in Real Time

Tare, P and Bhowmick, T and Katagi, G and China, A and Nagaraja, V (2023) Comparison of Transcription Elongation Rates of Three RNA Polymerases in Real Time. In: ACS Omega, 8 (50). pp. 47510-47519.

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Abstract

RNA polymerases (RNAPs) across the bacterial kingdom have retained a conserved structure and function. In spite of the remarkable similarity of the enzyme in different bacteria, a wide variation is found in the promoter-polymerase interaction, transcription initiation, and termination. However, the transcription elongation was considered to be a monotonic process, although the rate of elongation could vary in different bacteria. Such variations in RNAP elongation rates could be important to fine-tune the transcription, which in turn would influence cellular metabolism and growth rates. Here, we describe a quantitative study to measure the transcription rates for the RNAPs from three bacteria, namely, Mycobacterium tuberculosis, Mycobacterium smegmatis, and Escherichia coli, which exhibit different growth kinetics. The RNA synthesis rates of the RNAPs were calculated from the real-time elongation kinetic profile using surface plasmon resonance through a computational flux flow model. The computational model revealed the modular process of elongation, with different rate profiles for the three RNAPs. Notably, the transcription elongation rates of these RNAPs followed the trend in the growth rates of these bacteria. © 2023 The Authors. Published by American Chemical Society

Item Type:	Journal Article
Publication:	ACS Omega
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the authors.
Department/Centre:	Division of Biological Sciences > Microbiology & Cell Biology Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Aug 2024 05:50
Last Modified:	02 Aug 2024 05:50
URI:	http://eprints.iisc.ac.in/id/eprint/85301

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