The Asgard archaeal origins of Arf family GTPases involved in eukaryotic organelle dynamics

Nature Microbiology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Language: Английский

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Distinctive roles of crayfish shell-based biochar on sludge anaerobic digestion: Insights of microbial communities and metabolic pathways

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 70, P. 107121 - 107121

Published: Jan. 31, 2025

Language: Английский

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Unveiling the life of archaea in sediments: Diversity, metabolic potentials, and ecological roles

iMetaOmics., Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract The domain Archaea was initially characterized as extremophiles upon its proposal. Recent significant discoveries have redrawn our views of archaeal biology, encompassing the identification mesophilic groups, expansion diversity and metabolic capabilities, elucidation evolutionary relationships among archaea, bacteria, eukaryotes. are ubiquitous constitute a substantial fraction microbial biomass within sediments. Therefore, comprehending their ecological roles is paramount for understanding contributions to global geochemical cycles. In this review, we summarize archaea across various sediment ecosystems, from terrestrial inland deep‐sea environments, utilizing representative genomes supported by Genome Taxonomy Database, which encompasses habitats such hot springs, salt lakes, freshwater rivers, mangroves, estuaries, coastal regions, seafloor sediments, cold seeps, hydrothermal vents. Furthermore, integrate analyses with recent studies highlight potentials, novel enzymatic functions, related carbon, nitrogen, sulfur cycles different lineages. Finally, discuss research hotspots achievements in studies, while projecting future exploration directions. expanding capacities broadened perspective on tree life underscored critical impacts ecosystems.

Language: Английский

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Carbon Cycling in Wetlands Under the Shadow of Microplastics: Challenges and Prospects

Toxics, Journal Year: 2025, Volume and Issue: 13(3), P. 143 - 143

Published: Feb. 20, 2025

Wetlands are one of the most crucial ecosystems for regulating carbon sequestration and mitigating global climate change. However, disturbance to dynamics caused by microplastics (MPs) in wetlands cannot be overlooked. This review explores impacts MPs on cycles within wetland ecosystems, focusing underlying physicochemical microbial mechanisms. The accumulation sediments can severely destabilize plant root functions, disrupting water, nutrient, oxygen transport, thereby reducing biomass development. Although may temporarily enhance storage, they ultimately accelerate mineralization organic carbon, leading increased atmospheric dioxide emissions undermining long-term sequestration. A critical aspect this process involves shifts community structures driven selective colonization MPs, which affect decomposition methane production, thus posing a threat greenhouse gas emissions. Notably, dissolved matter derived from biodegradable promote photoaging coexisting enhancing release harmful substances aged further impacting microbial-associated due disrupted metabolic activity. Therefore, it is imperative deepen our understanding adverse effects mechanisms health cycles. Future strategies should incorporate regulation ecological engineering techniques develop effective methodologies aimed at maintaining sustainable capacity affected MP contamination.

Language: Английский

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Complete genomes of Asgard archaea reveal diverse integrated and mobile genetic elements

Genome Research, Journal Year: 2024, Volume and Issue: 34(10), P. 1595 - 1609

Published: Oct. 1, 2024

Asgard archaea are of great interest as the progenitors Eukaryotes, but little is known about mobile genetic elements (MGEs) that may shape their ongoing evolution. Here, we describe MGEs replicate in Atabeyarchaeia, a wetland lineage represented by two complete genomes. We used soil depth-resolved population metagenomic data sets to track 18 for which genome structures were defined and precise chromosome integration sites could be identified confident host linkage. Additionally, 20.67 kbp circular plasmid family-level groups viruses linked via CRISPR spacer targeting. Closely related 40 possess hypervariable genomic region encoding combinations specific genes small cysteine-rich proteins structurally similar restriction-homing endonucleases. One 10.9 integrative conjugative element (ICE) integrates genomically into

Language: Английский

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Structure of an Archaeal Ribosome with a Divergent Active Site

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Abstract The ribosome is the universal translator of genetic code and shared across all life. Despite divergence in structure over course evolution, peptidyl transferase center (PTC), catalytic site ribosome, has been thought to be nearly universally conserved. Here, we identify clades archaea that have highly divergent ribosomal RNA sequences PTC. To understand how these PTC fold, determined cryo-EM structures Pyrobaculum calidifontis ribosome. We find sequence variation leads rearrangement key base triples differences between archaeal bacterial proteins also enable PTCs. Finally, a novel hibernation factor differs from known eukaryotic factors found multiple phyla. Overall, this work identifies regulate function reveals larger diversity most ancient

Language: Английский

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