Publications by authors named "Sergey Peltek"

As areas of application of terahertz (THz) radiation expand in science and practice, evidence is accumulating that this type of radiation can affect not only biological molecules directly, but also cellular processes as a whole. In this study, the transcriptome in cells of the thermophilic bacterium was analyzed immediately after THz irradiation (0.23 W/cm, 130 μm, 15 min) and at 10 min after its completion.

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Common wheat ( L.) is one of the most valuable cereal crops worldwide. This study examined leaf extracts of 30 accessions of and its subspecies using 48 h maceration with methanol by GC-MS and GCxGC-MS.

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In recent years, there has been an increasing tendency to create drugs based on certain commensal bacteria of the human microbiota and their ingredients, primarily focusing on live biotherapeutics (LBPs) and postbiotics. The creation of such drugs, termed pharmacobiotics, necessitates an understanding of their mechanisms of action and the identification of pharmacologically active ingredients that determine their target properties. Typically, these are complexes of biologically active substances synthesized by specific strains, promoted as LBPs or postbiotics (including vesicles): proteins, enzymes, low molecular weight metabolites, small RNAs, etc.

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In the 1980s, was the preferred host for heterologous protein expression owing to its capacity for rapid growth in complex media; well-studied genetics; rapid and direct transformation with foreign DNA; and easily scalable fermentation. Despite the relative ease of use of for achieving the high expression of many recombinant proteins, for some proteins, e.g.

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Group-specific component macrophage-activating factor (GcMAF) is the vitamin D-binding protein (DBP) deglycosylated at Thr. The protein is believed to exhibit a wide range of therapeutic properties associated with the activation of macrophagal immunity. An original method for GcMAF production, DBP conversion to GcMAF, and the analysis of the activating potency of GcMAF was developed in this study.

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Article Synopsis
  • * The study introduces a denoising autoencoder (DAE) to reduce noise in mass spectrometry (MS) data, improving the accuracy of bacterial strain classification.
  • * The DAE combined with Random Forest classification outperforms traditional methods, making it a more effective approach for precisely identifying Bacillus species in noisy conditions.
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Determination of chemotypes and of their role in the polymorphism of populations is an important field in the research on secondary metabolites of plants. In the present study, by gas chromatography coupled with mass spectrometry, the composition of bark extracts from rowan subsp. was determined for 16 trees growing within Akademgorodok of Novosibirsk, with bark samples collected both in winter and summer.

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Studying the effects of terahertz (THz) radiation on the proteome of temperature-sensitive organisms is limited by a number of significant technical difficulties, one of which is maintaining an optimal temperature range to avoid thermal shock as much as possible. In the case of extremophilic species with an increased temperature tolerance, it is easier to isolate the effects of THz radiation directly. We studied the proteomic response to terahertz radiation of the thermophilic , persisting under wide temperature fluctuations with a 60 °C optimum.

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Neutral protease pAsPs gene was obtained by sequence optimization of NpI protease from pAsPs was for the first time integrated in the genome of yeast strain T07, and then produced in a 5 L bioreactor with an enzyme yield of 150,800 U/mL of culture liquid towards casein. The specific activity of the pAsPs was 7,657,000 U/mg toward casein, 2320 U/mg toward hemoglobin, and 25,344 U/mg toward azocasein per 1 mg of the protein. The enzyme was found to be inhibited by Cu.

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Article Synopsis
  • The study explores microbial diversity and metabolic potential in unique saline and freshwater lakes in southwestern Siberia, specifically a hypersaline lake in the Novosibirsk region.
  • Using a metagenomic approach, researchers analyzed the composition and structure of microbial communities in different sediment layers and found significant phyla such as Proteobacteria, Cyanobacteria, and Bacteroidetes in the upper layers and different dominant bacteria in deeper layers.
  • The study reconstructed metabolic pathways to understand the microorganisms' roles in the biogeochemical cycles of carbon, nitrogen, and sulfur, highlighting the relationships among different microbial taxa across various ecological niches.
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In this study we demonstrated that exposure of Escherichia coli (E. coli) to terahertz (THz) radiation resulted in a change in the activities of the tdcABCDEFGR and matA-F genes (signs of cell aggregation), gene yjjQ (signs of suppression of cell motility), dicABCF, FtsZ, and minCDE genes (signs of suppression of cell division), sfmACDHF genes (signs of adhesin synthesis), yjbEFGH and gfcA genes (signs of cell envelope stabilization). Moreover, THz radiation induced E.

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Below is data on the microbial diversity in bottom sediments and microbial mats in water bodies within the Kurai Mercury Province (Ulagan District, Aktash village, Gorny Altai). A database on the geochemical features of water bodies in the study area is presented. Data was obtained using 16 s rRNA amplicon directed metagenomic sequencing on Illumina MiSeq.

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A fluorescent biosensor /pTdcR-TurboYFP sensitive to terahertz (THz) radiation was developed via transformation of () cells with plasmid, in which the promotor of the gene controls the expression of yellow fluorescent protein TurboYFP. The biosensor was exposed to THz radiation in various vessels and nutrient media. The threshold and dynamics of fluorescence were found to depend on irradiation conditions.

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Below is data on the microbial diversity of natural organic matter from the Dispersion Train of Sulfide Tailings (northern Salaire Ridge, southwestern Siberia, Russia, Ursk Village). Data was obtained using 16s rRNA amplicon directed metagenomic sequencing on Illumina MiSeq. The raw sequence data used for analysis is available in NCBI under the Sequence Read Archive (SRA) with BioProject No.

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This is data on the microbial diversity in the floating cyanobacterial community and sediment samples from the lake Solenoe (Novosibirsk region, Russia) obtained by metagenomic methods. Such a detailed data of the microbial diversity of the Novosibirsk oblast lake ecosystem was carried out for the first time. The purpose of our work was to reveal microbial taxonomic diversity and abundance, metabolic pathways and new enzyme findings the studied lake ecosystem using the next-generation sequencing (NGS) technology and metagenomic analysis.

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Article Synopsis
  • MALDI-TOF mass spectrometry is an efficient method for identifying microorganisms due to its speed and accuracy, but it lacks a universal reference database for mass spectra.
  • This study implements a geometric approach to process mass spectrometry data, enabling the creation of a web-based application that improves identification methods.
  • The research shows that new algorithms, which analyze full spectra without peak-picking, achieve accuracy comparable to existing software, with resources and data made available online for further use.
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  • * Researchers studied the microbial communities in the oil site, identifying their genetic characteristics and metabolic pathways related to hydrocarbon degradation, revealing significant links between geochemical factors and microbial community structure.
  • * The study concluded that geochemical parameters shape the composition and metabolic capabilities of these communities, with a predominant metabolic pathway for hydrocarbon oxidation, supporting the theory of abiogenic synthesis of Uzon’s hydrothermal petroleum.
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Background: Our aim was to study changes in the serum proteomic profile in coronary atherosclerosis.

Methods: The study involved two groups of patients: 1) men with coronary heart disease and coronary atherosclerosis (n = 15); 2) control (n = 15): men without coronary heart disease. The object of this study was blood serum.

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Article Synopsis
  • - Three new fluorescent biosensors were created by inserting plasmids into cells, which regulated the expression of fluorescent proteins using specific gene promoters.
  • - These biosensors were tested with two types of THz radiation: a powerful short-wave laser and a weaker continuous-wave device, showing that fluorescence levels varied based on the type and duration of radiation exposure.
  • - The study found that stress from heat or chemicals prevented fluorescence, indicating these biosensors could be useful for examining how THz radiation affects gene networks associated with the targeted gene promoters.
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  • The study focuses on the microbial diversity found in a geothermal spring on Kunashir Island, near an acidic creek.
  • Researchers utilized 16s rRNA amplicon directed metagenomic sequencing with the Illumina MiSeq technology for data collection.
  • The raw sequences and analysis data are publicly accessible via NCBI's Sequence Read Archive and GenBank, with specific BioProject and accession numbers provided for reference.
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  • - The study focuses on a thermophilic bacterial strain that shows promise for producing 2,3-butanediol, a valuable chemical for various industrial applications.
  • - Researchers developed a comprehensive genome-scale metabolic model that maps out 1,321 genes, 1,676 reactions, and 1,589 metabolites, making it the most complete model for this bacterial genus available to the public.
  • - The analysis suggests effective strategies for enhancing 2,3-butanediol production, such as adjusting cultivation conditions and modifying specific metabolic pathways, with some methods verified in related bacterial strains.
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Pharmacological targeting via small molecule-based chemical probes has recently acquired an emerging importance as a valuable tool to delineate molecular mechanisms. Induction of apoptosis via CD95/Fas and TRAIL-R1/2 is triggered by the formation of the death-inducing signaling complex (DISC). Caspase-8 activation at the DISC is largely controlled by c-FLIP proteins.

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The sp. isolate SL48-SHIP-3 genome was obtained from metagenomics sequencing of the microbial mat of Salt Lake Number 48 (54.201806N, 78.

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Background: To study the changes in protein composition of atherosclerotic plaques at different stages of their development in coronary atherosclerosis using proteomics.

Methods: The object of research consisted of homogenates of atherosclerotic plaques from coronary arteries at different stages of development, obtained from 15 patients. Plaque proteins were separated by two-dimensional electrophoresis.

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