Staphylococcus aureus subsp. aureus NCTC 8325
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ABSTRACT:
PROVIDER: PRJNA116575 | ENA |
REPOSITORIES: ENA
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Project description:Staphylococcus aureus subsp. aureus NCTC 8325 Raw sequence reads
| PRJNA279231 | ENA
Project description:We report the mRNA expression profile of Streptococcus pneumoniae Type 2 D39 strain-derived mutant lacking the phpP gene encoding eukaryote-type ser/thr phosphatase and the stkP gene encoding Ser/Thr protein kinase.
2019-04-13 | GSE113337 | GEO
Project description:Staphylococcus aureus is one of the most common hospital acquired infections. It colonizes immunocompromised patients and with the number of antibiotic resistant strains increasing, medicine needs new treatment options. Understanding more about the proteins this organism uses would further this goal. Hypothetical proteins are sequences thought to encode a functional protein but for which little to no evidence of that function exists. About half of the genomic proteins in reference strain S. aureus NCTC 8325 are hypothetical. Since annotation of these proteins can lead to new therapeutic targets, a high demand to characterize hypothetical proteins is present. This work examines 35 hypothetical proteins from the chromosome of S. aureus NCTC 8325. Examination includes physiochemical characterization; sequence homology; structural homology; domain recognition; structure modeling; active site depiction; predicted protein-protein interactions; protein-chemical interactions; protein localization; protein stability; and protein solubility. The examination revealed some hypothetical proteins related to virulent domains and protein-protein interactions including superoxide dismutase, O-antigen, bacterial ferric iron reductase and siderophore synthesis. Yet other hypothetical proteins appear to be metabolic or transport proteins including ABC transporters, major facilitator superfamily, S-adenosylmethionine decarboxylase, and GTPases. Progress evaluating some hypothetical proteins, particularly the smaller ones, was incomplete due to limited homology and structural information in public repositories. These data characterizing hypothetical proteins will contribute to the scientific understanding of S. aureus by identifying potential drug targets and aiding in future drug discovery.
| S-EPMC5267966 | biostudies-literature
Project description:The nucleoid occlusion factor Noc controls DNA replication initiation in Staphylococcus aureus [WGS-Seq]
| PRJNA393027 | ENA
Project description:The nucleoid occlusion factor Noc controls DNA replication initiation in Staphylococcus aureus [Tn-seq]
| PRJNA393999 | ENA
Project description:S. aureus is one of the major human pathogens that greatly impacts individuals and causes a variety of illnesses ranging from minor skin infections to life-threatening diseases, such as endocarditis, pneumonia, septicemia and toxic shock syndrome. Stk1/Stp1 are particular important for S. aureus pathogenesis and survival as they are thought to participate in regulating virulence, cell wall structure and antibiotic resistance. Understanding how Ser/Thr phosphorylation regulates virulence and antibiotic resistance will provide foundation for the development of novel therapeutic strategies against S. aureus infection. The phosphoproteomic analysis of Staphylococcus aureus Newman strain led to the identification of 76 peptides with mapped phosphorylation sites belonging to 29 distinct proteins. In the case of Stk1, only one peptide (residues 157-182), with the sequence ALSETSLTQTNHVLGTVQYFSPEQAK, was predicted to have a cluster of six phosphorylation sites (Ser159, Thr161, Ser162, Thr164, Thr166 and Thr172). This segment overlaps with the sequence of kinase activation loop (residues 154-176) in Stk1. Further biochemical studies revealed cis autophosphorylation of Thr172 in the GT/S motif is necessary for self-activation and kinase activity of Stk1, whereas the trans autophosphorylation of other activation loop serines/threonins are essential for the optimal kinase activity of Stk1.
2018-10-24 | PXD006285 | Pride
Project description:Different transcriptome, metabolome, and phosphoproteome studies have already indicated a regulatory role of Ser/Thr phosphorylation in the central metabolism of S. aureus. However, it remains still unknown how this exactly tunes its metabolism. For that reason, Extreme Pathway Analysis was used to understand metabolic flux regulation by Ser/Thr phosphorylation. YANAsquare software and YANAvergence routine were chosen to calculate pathway activities of WT, ΔpknB, Δstp, and double mutant S. aureus NewmanHG strains. Gene expression data of S. aureus NewmanHG were collected taking the wild type and mutations of kinase (pknB), phosphatase (stp) or both (pknB/stp) phenotypes. The resulting flux changes were modelled with YANAvergence taking the different gene expression data and an established genome scale model of S. aureus metabolic modes as basis. The fluxes of the different strains were next calculated, taking the gene expression data into account. A concerted metabolic change of fluxes was observed. In particular the pathways for peptidoglycan, nucleotide, and aromatic amino acid synthesis as well as catabolism involving aspartate transaminase (GOT) changed significantly compared to the wild type. Single mutations of pknB and stp were compared to illustrate their different contribution to the phenotype, e.g. pyrimidine synthesis is dramatically impaired by pknB deletion but much less by loss of stp. In the double knock out strain, there is higher activity of peptidoglycan, purine, and aromatic amino acids synthesis from glucose, but lower activity of pyrimidine synthesis from glucose compared to WT. The results suggest a probable regulatory role of Ser/Thr phosphorylation in amino acid catabolism and the glycolysis/gluconeogenesis switch to provide the cell with sufficient cell wall components, nucleotides, and aromatic amino acids. Yvck is suggested to serve as regulatory protein linking Ser/Thr phosphorylation to the previous results of S. aureus metabolism. Moreover, Yvck seems in particular to be involved in the switch between glycolysis and gluconeogenesis. However, further studies based on experimental approaches are needed to demonstrate that Ser/Thr phosphorylation and Yvck are necessary for a correct cell growth under gluconeogenic conditions. The metabolic model allows not only a comprehensive representation of these changes for all involved pathways in the four strains, it further points out the function of the previously unannotated ycvk operon.. The relevance of these specific metabolic pathway adaptations regarding the pathogenicity of S.aureus and their contributions to the infection process will be analyzed and discussed.
2019-11-11 | GSE122362 | GEO
Project description:The function of the Staphylococcus aureus eukaryotic-like serine/threonine protein kinase PknB was investigated by transcriptome analysis using DNA-microarray technology and biochemical assays. The transcriptional profile reveals a strong regulatory impact of PknB on the expression of genes encoding proteins which are involved in purine and pyrimidine biosynthesis, cell wall metabolism, autolysis, and glutamine synthesis.
2010-03-11 | GSE15346 | GEO
Project description:Effect of SAOUHSC_02810 deletion in S. aureus NCTC8325
| PRJNA242840 | ENA
Project description:Young adult fer-15;fem-1 Caenorhabditis elegans were infected with Staphylococcus aureus for 8 h to determine the transcriptional host response to Staphylococcus aureus. Analysis of differential gene expression in C. elegans young adults exposed to two different bacteria: E. coli strain OP50 (control), wild-type Staphylococcus aureus RN6390. Samples were analyzed at 8 hours after exposure to the different bacteria. These studies identified C. elegans genes induced by pathogen infection. Keywords: response to pathogen infection, innate immunity, host-pathogen interactions
2010-06-12 | GSE21819 | GEO