NMR resonance assignments of the FinO-domain of the RNA chaperone RocC.

ABSTRACT: In prokaryotic species, gene expression is commonly regulated by small, non-coding RNAs (sRNAs). In the gram-negative bacterium Legionella pneumophila, the regulatory, trans-acting sRNA molecule RocR base pairs with a complementary sequence in the 5'-untranslated region of mRNAs encoding for proteins in the bacterial DNA uptake system, thereby controlling natural competence. Sense-antisense duplexing of RocR with targeted mRNAs is mediated by the recently described RNA chaperone RocC. RocC contains a 12 kDa FinO-domain, which acts as sRNA binding platform, along with an extended C-terminal segment that is predicted to be mostly disordered but appears to be required for repression of bacterial competence. In this work we assigned backbone and side chain ¹H, ¹³C, and ¹⁵N chemical shifts of RocC's FinO-domain by solution NMR spectroscopy. The chemical shift data for this protein indicate a mixed α/β fold that is reminiscent of FinO from Escherichia coli. Our NMR resonance assignments provide the basis for a comprehensive analysis of RocC's chaperoning mechanism on a structural level.

SUBMITTER: Eidelpes R 

PROVIDER: S-EPMC7973641 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature