Description of Asgardarchaeum abyssi gen. nov. spec. nov., a novel species within the class Asgardarchaeia and phylum Asgardarchaeota in accordance with the SeqCode
Daniel Tamarit , Stephan Köstlbacher , Kathryn E. Appler , Kassiani Panagiotou , Valerie De Anda , Christian Rinke , Brett J. Baker , Thijs J.G. Ettema
{"title":"Description of Asgardarchaeum abyssi gen. nov. spec. nov., a novel species within the class Asgardarchaeia and phylum Asgardarchaeota in accordance with the SeqCode","authors":"Daniel Tamarit , Stephan Köstlbacher , Kathryn E. Appler , Kassiani Panagiotou , Valerie De Anda , Christian Rinke , Brett J. Baker , Thijs J.G. Ettema","doi":"10.1016/j.syapm.2024.126525","DOIUrl":null,"url":null,"abstract":"<div><p><em>Asgardarchaeota</em>, commonly referred to as Asgard archaea, is a candidatus phylum-rank archaeal clade that includes the closest archaeal relatives of eukaryotes. Despite their prevalence in the scientific literature, the name <em>Asgardarchaeota</em> lacks nomenclatural validation. Here, we describe a novel high-quality metagenome-assembled genome (MAG), AB3033_2<sup>TS</sup>, proposed to serve as the nomenclatural type for the species <em>Asgardarchaeum abyssi</em><sup>TS</sup> according to the rules of the SeqCode. Based on protein content and compositional features, we infer that <em>A. abyssi</em> AB3033_2<sup>TS</sup> is an acetogenic chemoheterotroph, possibly a facultative lithoautotroph, and is adapted to a thermophilic lifestyle. Utilizing genomes from Asgard archaea, TACK, and Euryarchaea, we perform phylogenomic reconstructions using the GTDB archaeal marker genes, the current reference set for taxonomic classification. Calibrating relative evolutionary divergence (RED) values for <em>Asgardarchaeota</em> using established <em>Thermoproteota</em> lineages in the GTDB r207 reference tree, we establish a robust classification and propose <em>Asgardarchaeum</em> as the type genus for the family <em>Asgardarchaeaceae</em> (fam. nov)., the order <em>Asgardarchaeales</em> (ord. nov.), the class <em>Asgardarchaeia</em> (class. nov.), and the phylum <em>Asgardarchaeota</em> (phyl. nov.). This effort aims to preserve taxonomic congruence in the scientific literature.</p></div>","PeriodicalId":22124,"journal":{"name":"Systematic and applied microbiology","volume":"47 4","pages":"Article 126525"},"PeriodicalIF":3.3000,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0723202024000390/pdfft?md5=1ae401ded59e8ae03224a402356a7cfa&pid=1-s2.0-S0723202024000390-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Systematic and applied microbiology","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0723202024000390","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Asgardarchaeota, commonly referred to as Asgard archaea, is a candidatus phylum-rank archaeal clade that includes the closest archaeal relatives of eukaryotes. Despite their prevalence in the scientific literature, the name Asgardarchaeota lacks nomenclatural validation. Here, we describe a novel high-quality metagenome-assembled genome (MAG), AB3033_2TS, proposed to serve as the nomenclatural type for the species Asgardarchaeum abyssiTS according to the rules of the SeqCode. Based on protein content and compositional features, we infer that A. abyssi AB3033_2TS is an acetogenic chemoheterotroph, possibly a facultative lithoautotroph, and is adapted to a thermophilic lifestyle. Utilizing genomes from Asgard archaea, TACK, and Euryarchaea, we perform phylogenomic reconstructions using the GTDB archaeal marker genes, the current reference set for taxonomic classification. Calibrating relative evolutionary divergence (RED) values for Asgardarchaeota using established Thermoproteota lineages in the GTDB r207 reference tree, we establish a robust classification and propose Asgardarchaeum as the type genus for the family Asgardarchaeaceae (fam. nov)., the order Asgardarchaeales (ord. nov.), the class Asgardarchaeia (class. nov.), and the phylum Asgardarchaeota (phyl. nov.). This effort aims to preserve taxonomic congruence in the scientific literature.
期刊介绍:
Systematic and Applied Microbiology deals with various aspects of microbial diversity and systematics of prokaryotes. It focuses on Bacteria and Archaea; eukaryotic microorganisms will only be considered in rare cases. The journal perceives a broad understanding of microbial diversity and encourages the submission of manuscripts from the following branches of microbiology: