在后续的研究中,奥丁古菌(Odinarchaeota)、海姆达尔古菌(Heimdallarchaeota)和索尔古菌(Thorarchaeota)也陆续被发现,它们与真核生物一道构成了Asgard Archaea总门,被认为是真核生物起源的谱系。结合之前对类泉古菌(eocyte-like or TACK)古菌的研究,接近真核生物起源的系统发生树被勾勒出来(图2. 变形古菌)。这些发...
2025年3月21日,瑞士苏黎世联邦理工学院(ETH)Martin Pilhofer研究组在Cell杂志发表了题为“Microtubulein Asgard archaea”的研究论文,首次在Asgard古菌中发现了能够形成微管纤维的异源二聚微管蛋白,为微管的进化起源提供了新的视角。 研究者首先在...
Asgard archaeaBiotopeCo-occurrenceEnvironmental driversAsgard is a newly proposed archaeal superphylum, which has been suggested to hold the key to decipher the origin of Eukaryotes. However, their ecology remains largely unknown. Here, we conducted a meta-analysis of publicly available Asgard-...
Asgard archaea also known as Asgardarchaeota is a superphylum of archaea which includes the closest prokaryotic relatives to eukaryotes. Lokiarchaeota, Thorarchaeota, Odinarchaeota, and Heimdallarchaeota phyla were the first members of the group, and new phyla have recently been incorporated. T...
阿斯加德古菌中包含与真核生物类似的基因,例如洛基古菌,被发现具有真核生物的标志性基因肌动蛋白基因,通过对它们DNA的深入分析,表明所有的现代真核生物来自同一个古菌群。如果真是这样的话,基本上所有复杂的生命,从绿藻到巨大的蓝鲸,它们最初都来自古菌。
Asgard archaea are considered to be the closest known relatives of eukaryotes. Their genomes contain hundreds of eukaryotic signature proteins (ESPs), which inspired hypotheses on the evolution of the eukaryotic cell1–3. A role of ESPs in the formation
However, Asgard archaea are notoriously slow-growing, largely uncultivated, and not genetically accessible. Furthermore, ‘Ca. H. repetitus’ was enriched from undetectable to only 1% of the community on a low-biomass hydrothermal rock24, and is therefore not a suitable host for physiological ...
Our phylogenomic analysis does not resolve unequivocally the evolutionary relationship between eukaryotes and Asgard archaea, but instead—depending on the choice of species and conserved genes used to build the phylogeny—supports either the origin of eukaryotes from within Asgard (as a sister group to...
2017 Asgard archaea illuminate the origin of eukaryotic cellular complexity. Nature 541: 353-358.Zaremba-Niedzwiedzka, K. et al. (2017) Asgard archaea illumi- nate the origin of eukaryotic cellular complexity. Nature 541, 353-358... M Rout - Faculty Opinions – Post-Publication Peer Review...
Here we present a comparative analysis of 162 complete or nearly complete genomes of Asgard archaea, including 75 metagenome-assembled genomes that—to our knowledge—have not previously been reported. Our results substantially expand the phylogenetic diversity of Asgard and lead us to propose six ...