ArticleJournal of bacteriology2012
MS_RHII-RSD, a dual-function RNase HII-(p)ppGpp synthetase from Mycobacterium smegmatis.
Article in Journal of bacteriology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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Who cites it
33 citing papers in PubMed, 53 citations in OpenAlex.
- Rel-dependent decrease in the expression of ribosomal protein genes by inhibition of the respiratory electron transport chain inFrontiers in microbiology · 2024Article
- MnoSR removal inFrontiers in cellular and infection microbiology · 2024Article
- Tale of Twin Bifunctional Second Messenger (p)ppGpp Synthetases and Their Function in Mycobacteria.ACS omega · 2023Review
- Functional Characterization of Small Alarmone Synthetase and Small Alarmone Hydrolase Proteins from Treponema denticola.Microbiology spectrum · 2023Article
- The C-Terminal Acid Phosphatase Module of the RNase HI Enzyme RnhC Controls Rifampin Sensitivity and Light-Dependent Colony Pigmentation of Mycobacterium smegmatis.Journal of bacteriology · 2023Article
- Transcriptomic Analysis Reveals Key Roles of (p)ppGpp and DksA in Regulating Metabolism and Chemotaxis inInternational journal of molecular sciences · 2023Article
- Mycobacterial Regulatory Systems Involved in the Regulation of Gene Expression Under Respiration-Inhibitory Conditions.Journal of microbiology (Seoul, Korea) · 2023Review
- Similar and Divergent Roles of Stringent Regulator (p)ppGpp and DksA on Pleiotropic Phenotype of Yersinia enterocolitica.Microbiology spectrum · 2022Article
- InJournal of bacteriology · 2022Article
- Stringent Response in Mycobacteria: From Biology to Therapeutic Potential.Pathogens (Basel, Switzerland) · 2021Review
- The stringent response and physiological roles of (pp)pGpp in bacteria.Nature reviews. Microbiology · 2021Review
- RelZ-Mediated Stress Response inJournal of bacteriology · 2020Article
- (p)ppGpp Metabolism and Antimicrobial Resistance in Bacterial Pathogens.Frontiers in microbiology · 2020Review
- Pleiotropic Effects of Bacterial Small Alarmone Synthetases: Underscoring the Dual-Domain Small Alarmone Synthetases inFrontiers in microbiology · 2020Review
- Regulation of mRNA Stability During Bacterial Stress Responses.Frontiers in microbiology · 2020Review
- Article
- The stringent response and Mycobacterium tuberculosis pathogenesis.Pathogens and disease · 2018Review
- Species-Specific Interactions of Arr with RplK Mediate Stringent Response in Bacteria.Journal of bacteriology · 2018Article
- Synthetic (p)ppGpp Analogue Is an Inhibitor of Stringent Response in Mycobacteria.Antimicrobial agents and chemotherapy · 2017Article
- Division of labor among Mycobacterium smegmatis RNase H enzymes: RNase H1 activity of RnhA or RnhC is essential for growth whereas RnhB and RnhA guard against killing by hydrogen peroxide in stationary phase.Nucleic acids research · 2017Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In the noninfectious soil saprophyte Mycobacterium smegmatis, intracellular levels of the stress alarmones guanosine tetraphosphate and guanosine pentaphosphate, together termed (p)ppGpp, are regulated by the enzyme Rel(Msm). This enzyme consists of a single, bifunctional polypeptide chain that is capable of both synthesizing and hydrolyzing (p)ppGpp. The rel(Msm) knockout strain of M. smegmatis (Δrel(Msm)) is expected to show a (p)ppGpp null [(p)ppGpp(0)] phenotype. Contrary to this expectation, the strain is capable of synthesizing (p)ppGpp in vivo. In this study, we identify and functionally characterize the open reading frame (ORF), MSMEG_5849, that encodes a second functional (p)ppGpp synthetase in M. smegmatis. In addition to (p)ppGpp synthesis, the 567-amino-acid-long protein encoded by this gene is capable of hydrolyzing RNA·DNA hybrids and bears similarity to the conventional RNase HII enzymes. We have classified this protein as actRel(Msm) in accordance with the recent nomenclature proposed and have named it MS_RHII-RSD, indicating the two enzymatic activities present [RHII, RNase HII domain, originally identified as domain of unknown function 429 (DUF429), and RSD, RelA_SpoT nucleotidyl transferase domain, the SYNTH domain responsible for (p)ppGpp synthesis activity]. MS_RHII-RSD is expressed and is constitutively active in vivo and behaves like a monofunctional (p)ppGpp synthetase in vitro. The occurrence of the RNase HII and (p)ppGpp synthetase domains together on the same polypeptide chain is suggestive of an in vivo role for this novel protein as a link connecting the essential life processes of DNA replication, repair, and transcription to the highly conserved stress survival pathway, the stringent response.
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