Subgroup level differences of physiological activities in marine Lokiarchaeota DOI Creative Commons
Xiuran Yin, Mingwei Cai, Yang Liu

и другие.

The ISME Journal, Год журнала: 2020, Номер 15(3), С. 848 - 861

Опубликована: Ноя. 4, 2020

Abstract Asgard is a recently discovered archaeal superphylum, closely linked to the emergence of eukaryotes. Among archaea, Lokiarchaeota are abundant in marine sediments, but their situ activities largely unknown except for Candidatus ‘Prometheoarchaeum syntrophicum’. Here, we tracked activity incubations with Helgoland mud area sediments (North Sea) by stable isotope probing (SIP) organic polymers, 13C-labelled inorganic carbon, fermentation intermediates and proteins. Within active detected members class Loki-3, which appeared mixotrophically participate degradation lignin humic acids while assimilating CO2, or heterotrophically used lactate. In contrast, Loki-2 utilized protein degraded bacterial biomass formed incubations. Metagenomic analysis revealed pathways lactate degradation, involvement aromatic compound less globally distributed instead rely on degradation. We conclude that Lokiarchaeotal subgroups vary metabolic capabilities despite overlaps genomic equipment, suggest these occupy different ecologic niches sediments.

Язык: Английский

Expanded diversity of Asgard archaea and their relationships with eukaryotes DOI
Yang Liu, Kira S. Makarova, Wen-Cong Huang

и другие.

Nature, Год журнала: 2021, Номер 593(7860), С. 553 - 557

Опубликована: Апрель 28, 2021

Язык: Английский

Процитировано

247
Ecological responses, adaptation and mechanisms of mangrove wetland ecosystem to global climate change and anthropogenic activities DOI
You‐Shao Wang,

Ji‐Dong Gu

International Biodeterioration & Biodegradation, Год журнала: 2021, Номер 162, С. 105248 - 105248

Опубликована: Июнь 1, 2021

Язык: Английский

Процитировано

185
Actin cytoskeleton and complex cell architecture in an Asgard archaeon DOI Creative Commons
Thiago Rodrigues-Oliveira, Florian Wollweber,

Rafael I. Ponce-Toledo

и другие.

Nature, Год журнала: 2022, Номер 613(7943), С. 332 - 339

Опубликована: Дек. 21, 2022

Abstract Asgard archaea are considered to be the closest known relatives of eukaryotes. Their genomes contain hundreds eukaryotic signature proteins (ESPs), which inspired hypotheses on evolution cell 1–3 . A role ESPs in formation an elaborate cytoskeleton and complex cellular structures has been postulated 4–6 , but never visualized. Here we describe a highly enriched culture ‘ Candidatus Lokiarchaeum ossiferum’, member phylum, thrives anaerobically at 20 °C organic carbon sources. It divides every 7–14 days, reaches densities up 5 × 10 7 cells per ml significantly larger genome compared with single previously cultivated strain represent 5% its protein-coding genes, including four actin homologues. We imaged enrichment using cryo-electron tomography, identifying Ca L. ossiferum’ basis characteristic expansion segments their ribosomes. Cells exhibited coccoid bodies network branched protrusions frequent constrictions. The envelope consists membrane surface structures. long-range extends throughout bodies, twisted double-stranded architecture filaments is consistent F-actin. Immunostaining indicates that comprise Lokiactin—one most conserved archaea. propose actin-based predated emergence first eukaryotes was crucial feature phylum by scaffolding

Язык: Английский

Процитировано

114
The Asgard archaeal origins of Arf family GTPases involved in eukaryotic organelle dynamics DOI
Romana Vargová,

Roxanne Chevreau,

Marine Alves

и другие.

Nature Microbiology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Язык: Английский

Процитировано

3
Genomic and transcriptomic insights into methanogenesis potential of novel methanogens from mangrove sediments DOI Creative Commons
Cui‐Jing Zhang, Jie Pan, Yang Liu

и другие.

Microbiome, Год журнала: 2020, Номер 8(1)

Опубликована: Июнь 17, 2020

Methanogens are crucial to global methane budget and carbon cycling. from the phylum Euryarchaeota currently classified into one class seven orders, including two novel methanogen taxa, Methanofastidiosa Methanomassiliicoccales. The relative importance of methanogens production in natural environment is poorly understood.Here, we used a combined metagenomic metatranscriptomic approach investigate metabolic activity mangrove sediments Futian Nature Reserve, Shenzhen. We obtained 13 metagenome-assembled genomes (MAGs) representing (Methanofastidiosa) five orders (Methanomassiliicoccales, Methanomicrobiales, Methanobacteriales, Methanocellales, Methanosarcinales) methanogens, methanogens. Comprehensive annotation indicated presence an H2-dependent methylotrophic methanogenesis pathway Based on functional gene analysis, hydrogenotrophic dominant pathways sediments. MAG mapping revealed that Methanomicrobiales were most abundant Methanomassiliicoccales active analyzed sediment profile, suggesting their important roles production.Partial or near-complete Methanomassiliicoccales, environments recovered here for first time. presented findings highlight ecological complement knowledge how produced ecosystem. This study implies play vital role cycle. Video Abstract.

Язык: Английский

Процитировано

94
Unique mobile elements and scalable gene flow at the prokaryote–eukaryote boundary revealed by circularized Asgard archaea genomes DOI Creative Commons
Fabai Wu, Daan R. Speth, Alon Philosof

и другие.

Nature Microbiology, Год журнала: 2022, Номер 7(2), С. 200 - 212

Опубликована: Янв. 13, 2022

Eukaryotic genomes are known to have garnered innovations from both archaeal and bacterial domains but the sequence of events that led complex gene repertoire eukaryotes is largely unresolved. Here, through enrichment hydrothermal vent microorganisms, we recovered two circularized Heimdallarchaeum species belong an Asgard archaea clade phylogenetically closest eukaryotes. These reveal diverse mobile elements, including integrative viral genome bidirectionally replicates in a circular form aloposons, transposons encode 5,000 amino acid-sized proteins Otus Ephialtes. Heimdallaechaeal elements various genes bacteria bacteriophages, likely playing role shuffling functions across domains. The number archaea- bacteria-related follow strikingly different scaling laws archaea, exhibiting size-dependent ratio functional division resembling bacteria- archaea-derived Bacterial import has thus been continuous process unaltered by eukaryogenesis scaled up expansion. Our data further highlight importance viewing pan-Asgard context, which proposal conceptual framework, is, Heimdall nucleation-decentralized innovation-hierarchical model accounts for emergence eukaryotic complexity.

Язык: Английский

Процитировано

54
Newly discovered Asgard archaea Hermodarchaeota potentially degrade alkanes and aromatics via alkyl/benzyl-succinate synthase and benzoyl-CoA pathway DOI Creative Commons
Jia-wei Zhang, Hongpo Dong, Lijun Hou

и другие.

The ISME Journal, Год журнала: 2021, Номер 15(6), С. 1826 - 1843

Опубликована: Янв. 15, 2021

Asgard archaea are widely distributed in anaerobic environments. Previous studies revealed the potential capability of to utilize various organic substrates including proteins, carbohydrates, fatty acids, amino acids and hydrocarbons, suggesting that play an important role sediment carbon cycling. Here, we describe a previously unrecognized archaeal phylum, Hermodarchaeota, affiliated with superphylum. The genomes these were recovered from metagenomes generated mangrove sediments, found encode alkyl/benzyl-succinate synthases their activating enzymes similar those identified alkane-degrading sulfate-reducing bacteria. Hermodarchaeota also potentially involved alkyl-coenzyme A benzoyl-coenzyme oxidation, Wood-Ljungdahl pathway nitrate reduction. These results indicate members this phylum have strictly anaerobically degrade alkanes aromatic compounds, coupling reduction nitrate. By screening Sequence Read Archive, additional genes encoding 16S rRNA analogous metagenomic datasets wide range marine freshwater sediments. findings suggest capable degrading aromatics via formation alkyl/benzyl-substituted succinates ubiquitous

Язык: Английский

Процитировано

53
Expanding Archaeal Diversity and Phylogeny: Past, Present, and Future DOI Open Access

Guillaume Tahon,

Patricia Geesink, Thijs J. G. Ettema

и другие.

Annual Review of Microbiology, Год журнала: 2021, Номер 75(1), С. 359 - 381

Опубликована: Авг. 5, 2021

The discovery of the Archaea is a major scientific hallmark twentieth century. Since then, important features their cell biology, physiology, ecology, and diversity have been revealed. Over course some 40 years, known archaea has expanded from 2 to about 30 phyla comprising over 20,000 species. Most this archaeal revealed by environmental 16S rRNA gene amplicon sequencing surveys using broad range universal targeted primers. Of few primers that target large fraction diversity, all display bias against recently discovered lineages, which limits studies aiming survey overall diversity. Induced genomic exploration improved phylogenomics approaches, taxonomic classification frequently revised. Due computational limitations continued new stable phylogeny not yet within reach. Obtaining phylogenetic consensus should be high priority for research community.

Язык: Английский

Процитировано

53
Mythical origins of the actin cytoskeleton DOI Creative Commons
Caner Akıl, Yoshihito Kitaoku, Linh T. Tran

и другие.

Current Opinion in Cell Biology, Год журнала: 2020, Номер 68, С. 55 - 63

Опубликована: Окт. 10, 2020

Язык: Английский

Процитировано

52
Biogeography, Assembly Patterns, Driving Factors, and Interactions of Archaeal Community in Mangrove Sediments DOI
Zhifeng Zhang, Jie Pan,

Yue-Ping Pan

и другие.

mSystems, Год журнала: 2021, Номер 6(3)

Опубликована: Июнь 15, 2021

Archaea are a major part of Earth's life. They believed to play important roles in nutrient biogeochemical cycling the mangrove. However, only few studies on archaeal community mangroves have been reported. In particular, assembly processes and interaction patterns that impact communities not investigated date. Here, biogeography, patterns, driving factors seven representative across southeastern China were systematically analyzed. The analysis revealed is more diverse surface sediments than subsurface sediments, at low latitudes high latitudes, with

Язык: Английский

Процитировано

48