RIP-seq reveals RNAs that interact with RNA polymerase and primary sigma factors in bacteria
Viola Vaňková Hausnerová, Mahmoud Shoman, Dilip Kumar, Marek Schwarz, Martin Modrák, Jitka Jirát Matějčková, Eliška Mikesková, Silvia Neva, Anna Herrmannová, Michaela Šiková, Petr Halada, Iva Novotná, Petr Pajer, Leoš Shivaya Valášek, Martin Převorovský, Libor Krásný, Jarmila Hnilicová
Abstract
Bacteria have evolved structured RNAs that can associate with RNA polymerase (RNAP). Two of them have been known so far-6S RNA and Ms1 RNA but it is unclear if any other types of RNAs binding to RNAP exist in bacteria. To identify all RNAs interacting with RNAP and the primary σ factors, we have established and performed native RIP-seq in Bacillus subtilis, Corynebacterium glutamicum, Streptomyces coelicolor, Mycobacterium smegmatis and the pathogenic Mycobacterium tuberculosis. Besides known 6S RNAs in B. subtilis and Ms1 in M. smegmatis, we detected MTS2823, a homologue of Ms1, on RNAP in M. tuberculosis. In C. glutamicum, we discovered novel types of structured RNAs that associate with RNAP. Furthermore, we identified other species-specific RNAs including full-length mRNAs, revealing a previously unknown landscape of RNAs interacting with the bacterial transcription machinery.