Publication details

The Delta Subunit of RNA Polymerase Is Required for Rapid Changes in Gene Expression and Competitive Fitness of the Cell

Authors

RABATINOVÁ Alžbeta ŠANDEROVÁ Hana JIRÁT MATĚJČKOVÁ Jitka KORELUSOVÁ Jana SOJKA Luděk BARVÍK Ivan PAPOUŠKOVÁ Veronika SKLENÁŘ Vladimír ŽÍDEK Lukáš KRÁSNÝ Libor

Year of publication 2013
Type Article in Periodical
Magazine / Source Journal of Bacteriology
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://jb.asm.org/content/195/11/2603.full
Doi http://dx.doi.org/10.1128/JB.00188-13
Field Biochemistry
Keywords RNA polymerase; delta subunit; regulation; nucleoside triphosphate; gene expression; cell survival
Description RNA polymerase (RNAP) is an extensively studied multisubunit enzyme required for transcription of DNA into RNA, yet the delta subunit of RNAP remains an enigmatic protein whose physiological roles have not been fully elucidated. Here, we identify a novel, so far unrecognized function of delta from Bacillus subtilis. We demonstrate that delta affects the regulation of RNAP by the concentration of the initiating nucleoside triphosphate ([iNTP]), an important mechanism crucial for rapid changes in gene expression in response to environmental changes. Consequently, we demonstrate that delta is essential for cell survival when facing a competing strain in a changing environment. Hence, although delta is not essential per se, it is vital for the cell's ability to rapidly adapt and survive in nature. Finally, we show that two other proteins, GreA and YdeB, previously implicated to affect regulation of RNAP by [iNTP] in other organisms, do not have this function in B. subtilis.
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