Proteomic analysis of Streptococcus mutans after RpoA-K173R mutation
Ontology highlight
ABSTRACT:
INSTRUMENT(S): Q Exactive HF
ORGANISM(S): Streptococcus Mutans Ua159
TISSUE(S): Whole Body
SUBMITTER: 
Xian Peng
LAB HEAD: Xian Peng
PROVIDER: PXD042680 | Pride | 2023-08-24
REPOSITORIES: Pride
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| WD342LQB1.zip | Other | |||
| txt.zip | Other |
Items per page: 5 1 - 2 of 2 |
Similar Datasets
Project description:Lysine malonylation is an evolutionarily conserved PTM from bacteria to mammals and involves malonyl-coenzyme (CoA) as a cofactor. Since the malonyl group has an acidic carboxylic group under physiological pH, malonylated lysine is negatively charged, which might impact on protein function and enzymatic activities. Like other short-chain acyl-CoAs, malonyl-CoA can be synthesized from its corresponding short-chain acyl salt, malonate, catalyzed by malonyl-CoA synthetase (Witkowski et al., 2011). In addition, malonyl-CoA can be produced during the carboxylation of acetyl-CoA by acetyl-CoA carboxylase (ACC), the carboxylation of acetyl-CoA by propionyl-CoA carboxylase, and the β-oxidation of old-chain-length dicarboxylic acids (Peng et al., 2011). Most studies on Kmal have been performed in mammalian systems and identified thousands of malonylated sites, revealing its role in the progress of diseases like type 2 diabetes, schizophrenia, and cardiac hypertrophy (Du et al., 2015; Smith et al., 2022; Wu et al., 2022). There has been increasing interest in dissecting the regulatory roles of Kmal in several bacterial species, such as Escherichia coli (Qian et al., 2016), Bacillus amyloliquefaciens (Fan et al., 2017), Mycobacterium tuberculosis (Bi et al., 2022), and Staphylococcus aureus (Shi et al., 2021), which demonstrates that Kmal exists in diverse prokaryotic organisms and participates in the regulation of various physiological processes. Even so, whether Kmal exists and affects protein functions in streptococci remains unknown. S. mutans is considered to be the most prevalent and cariogenic species in active carious lesions of humans, residing primarily in dental plaque, which is a biofilm that forms on the tooth surfaces. During the past decades, studies of S. mutans have focused on revealing the molecular mechanisms underlying the robust biofilm formation on tooth surfaces, the metabolism of a wide variety of carbohydrates obtained from the host diet, and the adaption of numerous environmental challenges (Lemos et al., 2019). Several studies have been performed to reveal the roles of PTMs in biofilm and cariogenic virulence. Wang et al. found that the phosphorylation of VicR could inhibit the expression of the glucosyltransferases gtfBC, thereby reducing the synthesis of extracellular polysaccharides (EPS), the major component of cariogenic biofilm (Wang et al., 2021). Acetylome study on the S. mutans depicted that acetylated substrates were globally altered in the biofilm state compared to the planktonic state, and the acetylated GtfBC showed decreased activities (Lei et al., 2021; Ma et al., 2021). Our previous study revealed that the S-glutathionylation of a thioredoxin-like protein is important for interspecies competition and cariogenicity of S. mutans(Li et al., 2020). These results suggest that various PTM types exist in S. mutans and participate in diverse physiological processes. The genome of S. mutans UA159 codes an acetyl coenzyme A carboxylase (ACC), which could synthesize malonyl-CoA through the carboxylation of acetyl-CoA (Ajdić et al., 2002), implying the existence of malonylation in this bacterium. Therefore, this study aimed to confirm the existence of Kmal in S. mutans and identify the malonylated sites globally. The present findings provide a systematic view of the functional roles of Kmal in various metabolic pathways of S. mutans.
2022-11-17 | PXD038045 | Pride
Project description:Lactate produced in glycolysis has recently been discovered to modify lysine residues on eukaryotic proteins, a post-translational modification (PTM) called lysine lactylation (Kla). This modification not only participates in regulating gene expression through lactylation of histones, but also impacts the function of non-histone proteins. However, lactylation in prokaryotes has not been reported. Here, we report the identification of 1869 lysine lactylation sites in 465 proteins in the cariogenic organism Streptococcus mutans using a newly developed 4-dimensional label-free quantitative proteomic approach, representing the first Kla dataset in prokaryotes. Combining quantitative analysis, we report that the modification levels of 282 sites from 124 proteins increased by over 1.5-fold, and 80 sites from 52 proteins decreased by over 0.67-fold in the biofilm growth state. These results provide a systematic perspective of the distribution and function of Kla and improve our understanding of the role of lactate in the metabolic regulation of prokaryotes.
2023-08-24 | PXD037027 | Pride
Project description:Comparative proteomic analysis of the biofilm proteome of the wild-type strain, mutant strain, and compound treated strain.
2021-02-26 | PXD021641 | Pride
Project description:we performed a comprehensive, quantitative phosphoproteomic profile analysis of six stages of the E. tenella life cycle: unsporulated oocysts (USO), partial sporulated 7 h oocysts (SO7h), sporulated oocysts (SO), sporozoites (S), second generation merozoite (M2) and gametocyte (G). The results revealed significant changes in the abundance of phosphoproteins during E. tenella development. The findings shed light on the key roles of protein phosphorylation and dephosphorylation in the E. tenella life cycle.
2022-02-16 | PXD029545 | Pride
Project description:Objective: To investigate the treatment and mechanism of lanthanum hydroxide on hyperphosphate-induced vascular calcification in chronic renal failure. Methods: Develop a rat model of CKD hyperphosphatemia. Rats were randomly allocated to the model, lanthanum hydroxide, lanthanum carbonate, Calcium carbonate groups. Determination of serum biochemical indicators and the determination of pathological analysis of kidney tissue, Von Kossa staining and CT scan on the aortic vessels. The proteomic analysis of aortic tissue in Vivo. A calcified VSMCs model was established. The calcium content and ALP activity were measured. RT-PCR measures the mRNA expression level of SM22α, Runx2, BMP-2 and TRAF6. Western Blot measures the protein expression level of SM22α, Runx2, BMP-2, TRAF6 and NF-κB. Results: Through the detection of serum biochemical indicators and pathological analysis of kidney tissue, it can be summaryed that lanthanum hydroxide has the effect of delaying the progression of renal failure and protecting renal function. We found that the administration of lanthanum hydroxide delayed the development of vascular calcification induced by hyperphosphatemia in CKD. It can be concluded that lanthanum hydroxide may affect vascular calcification through the NF-κB pathway. , To deal with Lanthanum chloride (LaCl3) inhibited phosphate induced calcification, osteo-/chondrogenic transdifferentiation, and NF-κB signaling in cultured VSMCs. Lanthanum hydroxide significantly reduces the expression of Runx2, BMP-2, TRAF6 and NF-κB. Conclusion: Lanthanum hydroxide has a protective effect on the kidneys, and can delay the development of vascular calcification by reducing serum phosphorus concentration.
2021-09-09 | PXD023081 | Pride
Project description:Elevated temperatures due to global warming seriously threaten crops production. Understanding molecular mechanisms of cellular responses to heat stress will help to improve crop tolerance to high temperature and yield. In this work, we show that deacetylation of non-histone proteins mediated by the rice cytoplasmic histone deacetylase HDA714 is required for plant tolerance to heat stress. HDA714 expression and protein accumulation are induced by heat stress. HDA714 loss-of-function affects specifically plant response to heat (42°C) while its over-expression enhances plant tolerance to the stress. Interestingly, heat stress led to decreases of overall protein lysine acetylation in rice plants, which depends on HDA714 function. HDA714-mediated deacetylation of metabolic enzymes stimulates glycolysis under heat stress. In addition, HDA714 protein is found within heat-induced stress granules (SGs), many identified rice SG proteins show lysine acetylation at normal temperature (25 °C), which is augmented in hda714 mutants. Finally, HDA714 interacts with and deacetylates several SG proteins and HDA714 loss-of-function impairs SG formation. Collectively, these results indicate that HDA714-mediated cellular protein lysine deacetylation responds to heat stress, affects metabolic activities, regulates SGs formation, and confers heat tolerance in rice plants.
2024-09-04 | PXD053060 | Pride
Project description:Childhood caries is an extremely common childhood chronic disease, affecting 60–90% of children in industrialized countries. It results in lesions in both the primary and permanent dentitions, hospitalizations and emergency room visits, high treatment costs, loss of school days, diminished ability to learn increases the risk of caries in adulthood. Streptococcus mutans is a key bacteria in caries development. While multiple caries risk factors have been identified, significant interpersonal variability not explained by known risk factors still exists. The immune system generates a personal antibody repertoire that helps maintain a balanced and healthy oral microbiome. Using mass-spectrometry, we probed in an hypothesis-free manner which S. mutans proteins are identified by antibodies of children with low and high DMFT (decayed, missing, filled teeth) scores. We identified a core set of proteins, recognized by the immune system of most individuals. This set was enriched with proteins enabling bacterial adhesion, and included glucosyltransferases and glucan-binding proteins known to be important for S. mutans cariogenicity. To explore the physiological relevance of these findings, we tested the ability of saliva from caries free individuals in preventing S. mutans from binding to the tooth surface. Indeed, saliva from individuals with caries free prevented S. mutans binding to teeth. These findings map the S. mutans proteome targeted by the immune system and suggest that inhibiting tooth attachment is a primary mechanism used by the immune system to maintain oral balance and prevent caries. These findings provide new insights into the role of the immune system in maintaining oral health and preventing caries development.
2023-06-26 | PXD043103 | Pride
Project description:S-glutathionylation is an important post-translational modification (PTM) process that targets the protein cysteine thiol by the addition of glutathione (GSH). This modification can prevent proteolysis from over-oxidation of protein cysteine residue during the condition of oxidative or nitrosative stress. Recent studies suggest that protein S-glutathionylation plays an essential role in control of cell-signaling pathways by affecting the protein function in bacteria and even humans. In this study, we investigated the impacts of S-glutathionylation on physiological regulation within Streptococcus mutans, the primary etiological agent of human dental caries. To determine S-glutathionylated proteins in bacteria, the Cys-reactive isobaric reagents iodoTMT (iodoacetyl Tandem Mass Tag) were used to label the S-glutathionylated Cys sites and anti-TMT antibody conjugated resins were used to enrich the modified peptides. Proteome profiling identified a total of 357 glutathionylated cysteines sites on 239 proteins. Functional enrichment analysis indicated that these S-glutathionylated proteins were involved in diverse important biological processes, such as pyruvate metabolism and glycolysis
2020-07-14 | PXD019564 | Pride
Project description:Male infertility is one of the most common complications of diabetes mellitus (DM). Dapagliflozin is widely used to manage the type II DM. This study aimed to assess the dapagliflozin’s effects on the spermatogenesis by administering either dapagliflozin (Dapa) or a vehicle (db) to diabetic male db/db mice, and using littermate male db/m mice as the control group (Con). We further performed the integrative analyses of the cecal shotgun metagenomics, cecal/plasmatic/testicular metabolomics, and testicular proteomics. We found that dapagliflozin treatment significantly alleviated the diabetes-induced spermatogenic dysfunction by improving sperm quality, including the sperm concentration and the sperm motility. The overall microbial composition was reshaped in Dapa mice and 13 species (such as Lachnospiraceae bacterium 3-1) were regarded as potential beneficial bacteria. Metabolites exhibited modified profiles, in which adenosine, cAMP, and 2’-deoxyinosine being notably altered in the cecum, plasma, and testis, respectively. Testicular protein expression patterns were similar between the Dapa and Con mice. In vivo results indicated that compared with db group, dapagliflozin treatment alleviated apoptosis and oxidative stress in testis tissues by down-regulating 2’-deoxyinosine. This was further validated by in vitro experiments using GC-2 cells. Our findings support the potential use of Dapa to prevent the diabetes-induced impaired sperm quality and to treat diabetic male infertility.
2024-01-04 | PXD034622 | Pride
Project description:The aim of this project was to profile the proteome of mouse-derived liver in order to identify those that showed significant quantitative different proteins among leptin-deficient (db/db) mouse, the genetic non-alcoholic fatty liver disease (NAFLD) mouse model and their lean BKS mouse group.
2022-10-14 | PXD027938 | Pride