Structural and Biochemical Insight into the Mechanism of Rv2837c from Mycobacterium tuberculosis as a c-di-NMP Phosphodiesterase

He, Qing; Wang, Feng; Liu, Shiheng; Zhu, Deyu; Cong, Hengjiang; Gao, Fei; Li, Bingqing; Wang, Hongwei; Lin, Zong; Liao, Jun; Gu, Lichuan

doi:10.1074/jbc.m115.699801

Cited by 51 publications

(73 citation statements)

References 42 publications

(24 reference statements)

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“…1). It has been reported that CnpB can also cleave c-di-GMP (24) and nanoRNA (23). Therefore, we determined whether the regulation of the cas genes by CnpB is mediated by c-di-GMP or nanoRNA.…”

Section: Rna-seq Analysis Revealed That Cnpb Controls Expression Of Tmentioning

confidence: 98%

Regulation of the CRISPR-Associated Genes by Rv2837c (CnpB) via an Orn-Like Activity in Tuberculosis Complex Mycobacteria

2018

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Clustered regularly interspaced short palindromic repeats (CRISPR) and the CRISPR-associated proteins (Cas) provide an adaptive immunity to bacteria and archaea against specific DNA invaders. (Mtb) encodes a Type III CRISPR-Cas system, which has not been experimentally explored. In this study, we found that the CRISPR-Cas systems of both Mtb and BCG were highly upregulated by deletion of Rv2837c (), which encodes a multifunctional protein that hydrolyzes cyclic di-AMP (c-di-AMP), cyclic di-GMP (c-di-GMP), and nanoRNAs (short oligonucleotides of five residues or shorter in length). By using genetic and biochemical approaches, we demonstrated that the CnpB-controlled transcriptional regulation of the CRISPR-Cas system is mediated by an Orn-like activity, rather than hydrolyzing the cyclic di-nucleotides. Additionally, our results revealed that tuberculosis (TB) complex mycobacteria are functional in processing CRISPR RNAs (crRNAs), which are also more abundant in Δ compared to the parent strain. The elevated crRNA levels in Δ can be partially reduced by expressing Our findings provide new insight into transcriptional regulation of bacterial CRISPR-Cas systems. Clustered regularly interspaced short palindromic repeats (CRISPR) and the CRISPR-associated proteins (Cas) provide an adaptive immunity against specific DNA invaders. (Mtb) encodes a Type III CRISPR-Cas system, which has not been experimentally explored. In this study, we first demonstrated that the CRISPR-Cas systems in tuberculosis (TB) complex mycobacteria are functional in processing CRISPR RNAs (crRNAs). We also showed that Rv2837c (CnpB) controls the expression of the CRISPR-Cas systems in TB complex mycobacteria through an oligoribonuclease (Orn)-like activity, which is very likely mediated by nanoRNA. Since little is known about regulation of CRISPR-Cas systems, our findings provide new insight into transcriptional regulation of bacterial CRISPR-Cas systems.

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Section: Rna-seq Analysis Revealed That Cnpb Controls Expression Of Tmentioning

confidence: 98%

Regulation of the CRISPR-Associated Genes by Rv2837c (CnpB) via an Orn-Like Activity in Tuberculosis Complex Mycobacteria

2018

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“…Although the structural basis for the recognition of cyclic di-AMP by the PDEs remains to be fully defined, the crystal structure of the standalone DHH/DHHA1 protein Rv2837c in complex with the hydro-lytic intermediate 5-pApA suggests that a set of residues from both DHH and DHHA1 domains contribute to the binding of cyclic di-AMP (94). Even assuming that only two families of cyclic di-AMP phosphodiesterases are found in nature, identification of the members of the two families by bioinformatics should still proceed with caution, and experimental validation is necessary.…”

Section: Functional Diversification Of Cyclic Di-amp Phosphodiesterasesmentioning

confidence: 99%

Progress in Understanding the Molecular Basis Underlying Functional Diversification of Cyclic Dinucleotide Turnover Proteins

2017

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Cyclic di-GMP was the first cyclic dinucleotide second messenger described, presaging the discovery of additional cyclic dinucleotide messengers in bacteria and eukaryotes. The GGDEF diguanylate cyclase (DGC) and EAL and HD-GYP phosphodiesterase (PDE) domains conduct the turnover of cyclic di-GMP. These three unrelated domains belong to superfamilies that exhibit significant variations in function, and they include both enzymatically active and inactive members, with a subset involved in synthesis and degradation of other cyclic dinucleotides. Here, we summarize current knowledge of sequence and structural variations that underpin the functional diversification of cyclic di-GMP turnover proteins. Moreover, we highlight that superfamily diversification is not restricted to cyclic di-GMP signaling domains, as particular DHH/DHHA1 domain and HD domain proteins have been shown to act as cyclic di-AMP phosphodiesterases. We conclude with a consideration of the current limitations that such diversity of action places on bioinformatic prediction of the roles of GGDEF, EAL, and HD-GYP domain proteins.KEYWORDS cyclic dinucleotide second messenger, GGDEF domain, EAL domain, HD-GYP domain, DHH/DHHA1 domain, cyclic GAMP, cyclic di-AMP, cyclic di-GMP, second messenger T he dinucleotide cyclic di-GMP is the most abundant second messenger in bacteria. It promotes the environmental lifestyle switch between sessility and motility, as well as the host-related lifestyle switch between acute and chronic/benign infection. A hallmark of the cyclic di-GMP signaling network is an apparent redundancy of cyclic di-GMP turnover proteins encoded in one genome. However, many of these proteins have distinct N-terminal sensing and signaling domains, suggesting that their activities in cyclic di-GMP turnover respond posttranslationally to various (and different) intraand extracellular signals. In gross terms, the number of cyclic di-GMP turnover proteins is linearly correlated with genome size within the different bacterial phyla, with Thermotogae having one of the highest cyclic di-GMP-related "IQs," the density of enzymes per megabase pair, with some species harboring over 100 cyclic di-GMP turnover proteins (http://www.ncbi.nlm.nih.gov/Complete_Genomes/c-di-GMP.html). As in other domain superfamilies, extensive sequence diversity exists. Here, we review the knowledge on the translation of sequence diversity of cyclic di-GMP turnover proteins into functional diversity. We conclude by discussing whether and how a unified nomenclature for cyclic di-GMP turnover proteins can be established.

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“…2A) and is proximal to the predicted substrate binding site (Fig. 2B) (32). To elucidate how the adaptive mutation may facilitate daptomycin resistance, we determined the phosphodiesterase activity of E. faecalis GdpP I440S toward its potential physiological substrate c-di-AMP.…”

Section: C-di-amp Signaling In Enterococcimentioning

confidence: 99%

A Novel Phosphodiesterase of the GdpP Family Modulates Cyclic di-AMP Levels in Response to Cell Membrane Stress in Daptomycin-Resistant Enterococci

Wang

Davlieva

Reyes

et al. 2017

Antimicrob Agents Chemother

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Substitutions in the LiaFSR membrane stress pathway are frequently associated with the emergence of antimicrobial peptide resistance in both Enterococcus faecalis and Enterococcus faecium. Cyclic di-AMP (c-di-AMP) is an important signal molecule that affects many aspects of bacterial physiology, including stress responses. We have previously identified a mutation in a gene (designated yybT) in E. faecalis that was associated with the development of daptomycin resistance, resulting in a change at position 440 (yybT I440S ) in the predicted protein. Here, we show that intracellular c-di-AMP signaling is present in enterococci, and on the basis of in vitro physicochemical characterization, we show that E. faecalis yybT encodes a cyclic dinucleotide phosphodiesterase of the GdpP family that exhibits specific activity toward c-di-AMP by hydrolyzing it to 5=pApA. The E. faecalis GdpP I440S substitution reduces c-di-AMP phosphodiesterase activity more than 11-fold, leading to further increases in c-di-AMP levels. Additionally, deletions of liaR (encoding the response regulator of the LiaFSR system) that lead to daptomycin hypersusceptibility in both E. faecalis and E. faecium also resulted in increased c-di-AMP levels, suggesting that changes in the LiaFSR stress response pathway are linked to broader physiological changes. Taken together, our data show that modulation of c-di-AMP pools is strongly associated with antibiotic-induced cell membrane stress responses via changes in GdpP activity or signaling through the LiaFSR system.

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Structural and Biochemical Insight into the Mechanism of Rv2837c from Mycobacterium tuberculosis as a c-di-NMP Phosphodiesterase

Cited by 51 publications

References 42 publications

Regulation of the CRISPR-Associated Genes by Rv2837c (CnpB) via an Orn-Like Activity in Tuberculosis Complex Mycobacteria

Regulation of the CRISPR-Associated Genes by Rv2837c (CnpB) via an Orn-Like Activity in Tuberculosis Complex Mycobacteria

Progress in Understanding the Molecular Basis Underlying Functional Diversification of Cyclic Dinucleotide Turnover Proteins

A Novel Phosphodiesterase of the GdpP Family Modulates Cyclic di-AMP Levels in Response to Cell Membrane Stress in Daptomycin-Resistant Enterococci

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