Candida species cause the most prevalent fungal illness, candidiasis.
Candida albicans is known to cause bloodstream infections.
This species is a commensal bacterium, but it can
cause hospital–acquired diseases, particularly in COVID-19
patients with impaired immune systems. Candida infections
have increased in patients with acute respiratory distress syndrome.
Coumarins are both naturally occurring and synthetically
produced. In this study, the biological activity of 40 coumarin
derivatives was used to create a three-dimensional quantitative
structure activity relationship (3D-QSAR) model. The
training and test minimum inhibitory concentration values
of C. albicans active compounds were split, and a regression
model based on statistical data was established. This model
served as a foundation for the creation of coumarin derivative
QSARs. This is a unique way to create new therapeutic compounds
for various ailments. We constructed novel structural
coumarin derivatives using the derived QSAR model, and the
models were confirmed using molecular docking and molecular
dynamics simulation.
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Multi-omics approaches, including metagenomics and single-
cell amplified genomics, have revolutionized our understanding
of the hidden diversity and function of microbes
in nature. Even in the omics age, cultivation is an essential
discipline in microbial ecology since microbial cultures are
necessary to assess the validity of an in silico prediction about
the microbial metabolism and to isolate viruses infecting bacteria
and archaea. However, the ecophysiological characteristics
of predominant freshwater bacterial lineages remain
largely unknown due to the scarcity of cultured representatives.
In an ongoing effort to cultivate the uncultured majority
of freshwater bacteria, the most abundant freshwater
Actinobacteria acI clade has recently been cultivated from
Lake Soyang through catalase-supplemented high-throughput
cultivation based on dilution-to-extinction. This method
involves physical isolation of target microbes from mixed populations,
culture media simulating natural habitats, and removal
of toxic compounds. In this protocol, we describe detailed
procedures for isolating freshwater oligotrophic microbes,
as well as the essence of the dilution-to-extinction culturing.
As a case study employing the catalase-supplemented
dilution-to-extinction protocol, we also report a cultivation
trial using a water sample collected from Lake Soyang. Of the
480 cultivation wells inoculated with a single lake-water sample,
75 new acI strains belonging to 8 acI tribes (acI-A1, A2,
A4, A5, A6, A7, B1, B4, C1, and C2) were cultivated, and each
representative strain per subclade could be revived from glycerol
stocks. These cultivation results demonstrate that the
protocol described in this study is efficient in isolating freshwater
bacterioplankton harboring streamlined genomes.
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Two-Dimensional Cell Separation: a High-Throughput Approach to Enhance the Culturability of Bacterial Cells from Environmental Samples Krishna K. Yadav, Yogesh Nimonkar, Bhagyashri J. Poddar, Lochana Kovale, Isita Sagar, Yogesh Shouche, Hemant J. Purohit, Anshuman A. Khardenavis, Stefan J. Green, Om Prakash, Kristen M. DeAngelis Microbiology Spectrum.2022;[Epub] CrossRef
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