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Structural and bioinformatics analyses identify deoxydinucleotide-specific nucleases and their association with genomic islands in gram-positive bacteria.
Nucleic Acids Res
January 2025
CSSB Centre for Structural Systems Biology, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
Dinucleases of the DEDD superfamily, such as oligoribonuclease, Rexo2 and nanoRNase C, catalyze the essential final step of RNA degradation, the conversion of di- to mononucleotides. The active sites of these enzymes are optimized for substrates that are two nucleotides long, and do not discriminate between RNA and DNA. Here, we identified a novel DEDD subfamily, members of which function as dedicated deoxydinucleases (diDNases) that specifically hydrolyze single-stranded DNA dinucleotides in a sequence-independent manner.
View Article and Find Full Text PDFPrevalence of antibiotic resistance genes in mining-impacted farmland environments.
Ecotoxicol Environ Saf
January 2025
SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, China. Electronic address:
Mining activities produce large quantities of tailings and acid mine drainage, which contain varieties of heavy metals, thereby affecting the downstream farmland soils and crops. Heavy metals could induce antibiotic resistance through co-selection pressure. However, the profiles of antibiotic resistance genes (ARGs) in the mining-affected farmland soils and crops are still unclear.
View Article and Find Full Text PDFSoil bacterial and fungal diversity and composition respond differently to desertified system restoration.
PLoS One
January 2025
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China.
Article Synopsis
- Desertification is a significant global issue causing the destruction of ecosystems, with the impact of soil microorganisms during restoration efforts not well understood.
- A study in the Hulun Buir Sandy Land of Northeast China showed that restoring desertified areas led to increased plant diversity and improved soil properties, including a decrease in soil pH and increases in organic and nitrogen content.
- While bacterial diversity increased in restored areas, fungal diversity decreased, and certain bacterial groups became more prevalent, highlighting the complex interactions between soil microorganisms and environmental factors during ecosystem restoration.
An unignorable human health risk posed by antibiotic resistome and microbiome in urban rivers: Insights from Beijing, China.
Environ Res
January 2025
College of Water Sciences, Beijing Normal University, Beijing, 100875, China. Electronic address:
Urban rivers are the main water bodies humans frequently come into contact with, so the risks posed are closely monitored. Antibiotic resistance genes (ARGs) residues in reclaimed water pose serious risks to human health. There are urgent needs to improve the understanding of distribution of and risks posed by ARGs in urban rivers.
View Article and Find Full Text PDFMicrobiome and metabolome reveal beneficial effects of baicalin on broiler growth performance and intestinal health.
Poult Sci
December 2024
State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China. Electronic address:
Normal function and health of the intestinal tract were necessary for the growth and development of broilers. Baicalin (BA) possessed a variety of biological activities. The objective of this study was to examine the impact of BA on the growth performance, intestinal barrier function, intestinal microbiota, and mucosal metabolism in broilers.
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