The Inhibition Effect and Mechanism of Staurosporine Isolated from sp. SNC087 Strain on Nasal Polyp.

This study aims to explore the potential inhibition effects of staurosporine isolated from a sp. SNC087 strain obtained from seawater on nasal polyps. Staurosporine possesses antimicrobial and antihypertensive activities.

Synthesis of Silver Nanoparticles Using F202Z8 and Their Biological Characterization.

The aim of this study is to describe the general features and eco-friendly biosynthesis of silver nanoparticles (AgNPs) from the marine bacterium F202Z8. To the best of our knowledge, no previous study has reported the biosynthesis of AgNPs using this strain. The formation of AgNPs using F202Z8 was synthesized intracellularly without the addition of any disturbing factors, such as antibiotics, nutrient stress, or electron donors.

sp. nov., a member of the isolated from the marine red algae sp.

A Gram-negative, pale yellow-pigmented, non-flagellated, motile, rod-shaped and aerobic bacterium, designated strain PG104, was isolated from red algae sp. collected from the coastal area of Pohang, Republic of Korea. Growth of strain PG104 was observed at 15-35 °C (optimum, 30 °C), pH 6.

and antimicrobial activity of the fungal metabolite toluquinol against phytopathogenic bacteria.

Introduction: Bacterial plant diseases cause tremendous economic losses worldwide. However, a few effective and sustainable control methods are currently available. To discover novel and effective management approaches, we screened marine fungi for their antibacterial activity against phytopathogenic bacteria and .

Sulfur and methane oxidation by a single microorganism.

Natural and anthropogenic wetlands are major sources of the atmospheric greenhouse gas methane. Methane emissions from wetlands are mitigated by methanotrophic bacteria at the oxic-anoxic interface, a zone of intense redox cycling of carbon, sulfur, and nitrogen compounds. Here, we report on the isolation of an aerobic methanotrophic bacterium, '' strain HY1, which possesses metabolic capabilities never before found in any methanotroph.

Characterization of the Proteolytic Activity of a Halophilic Strain SK1-1 Isolated from a Solar Saltern.

Salterns are hypersaline environments that are inhabited by diverse halophilic microorganisms, including fungi. In this study, we isolated a fungal strain SK1-1 from a saltern in the Republic of Korea, which was identified as . This is the first reported saline-environment-derived that belongs to the clade and encompasses xerophilic fungi.

sp. nov. a marine bacterium isolated from seawater.

A strictly aerobic, Gram-stain-negative, gliding, rod-shaped bacteria, designated strain S481, was isolated from a surface seawater sample collected at Gunsan marina, in the West Sea of the Republic of Korea. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain S481 formed a monophyletic clade with members of the genus , showing 93.7-95.

Retinaldehyde Dehydrogenase Inhibition-Related Adverse Outcome Pathway: Potential Risk of Retinoic Acid Synthesis Inhibition during Embryogenesis.

Retinoic acid (RA) is one of the factors crucial for cell growth, differentiation, and embryogenesis; it interacts with the retinoic acid receptor and retinoic acid X receptor to eventually regulate target gene expression in chordates. RA is transformed from retinaldehyde via oxidization by retinaldehyde dehydrogenase (RALDH), which belongs to the family of oxidoreductases. Several chemicals, including disulphiram, diethylaminobenzaldehyde, and SB-210661, can effectively inhibit RALDH activity, potentially causing reproductive and developmental toxicity.

Spindle-shaped viruses infect marine ammonia-oxidizing thaumarchaea.

Ammonia-oxidizing archaea (AOA) from the phylum Thaumarchaeota are ubiquitous in marine ecosystems and play a prominent role in carbon and nitrogen cycling. Previous studies have suggested that, like all microbes, thaumarchaea are infected by viruses and that viral predation has a profound impact on thaumarchaeal functioning and mortality, thereby regulating global biogeochemical cycles. However, not a single virus capable of infecting thaumarchaea has been reported thus far.

Genomic Insights Into the Acid Adaptation of Novel Methanotrophs Enriched From Acidic Forest Soils.

Soil acidification is accelerated by anthropogenic and agricultural activities, which could significantly affect global methane cycles. However, detailed knowledge of the genomic properties of methanotrophs adapted to acidic soils remains scarce. Using metagenomic approaches, we analyzed methane-utilizing communities enriched from acidic forest soils with pH 3 and 4, and recovered near-complete genomes of proteobacterial methanotrophs.

The characteristics and comparative analysis of methanotrophs reveal genomic insights into Methylomicrobium sp. enriched from marine sediments.

Methanotrophic bacteria are widespread and use methane as a sole carbon and energy source. They also play a crucial role in marine ecosystems by preventing the escape of methane into the atmosphere from diverse methane sources, such as methane seeps and hydrothermal vents. Despite their importance for methane carbon cycling, relatively few marine methanotrophic bacteria have been isolated and studied at the genomic level.

Ketobacter alkanivorans gen. nov., sp. nov., an n-alkane-degrading bacterium isolated from seawater.

Strain GI5 was isolated from a surface seawater sample collected from Garorim Bay (West Sea, Republic of Korea). The isolated strain was aerobic, Gram-stain-negative, rod-shaped, motile by means of a polar flagellum, negative for catalase and weakly positive for oxidase. The optimum growth pH, salinity and temperature were determined to be pH 7.

A novel methanotroph in the genus Methylomonas that contains a distinct clade of soluble methane monooxygenase.

Aerobic methane oxidation is a key process in the global carbon cycle that acts as a major sink of methane. In this study, we describe a novel methanotroph designated EMGL16-1 that was isolated from a freshwater lake using the floating filter culture technique. Based on a phylogenetic analysis of 16S rRNA gene sequences, the isolate was found to be closely related to the genus Methylomonas in the family Methylococcaceae of the class Gammaproteobacteria with 94.