{"response":{"status":"ok","message_type":"name"},"id":49711,"name":"Acaudatibacter boreus","url":"https://api.seqco.de/v1/names/49711.json","uri":"https://seqco.de/i:49711","rank":"species","status_name":"Valid (SeqCode)","syllabication":"bo're.us","priority_date":"2026-05-11T17:58:19.127Z","description":{"raw":"Four metagenome-assembled genomes representing this species were assembled from sequence data obtained from samples taken from anoxic strata of a lake in Kiruna (Sweden), referred to as Ki1. Completeness estimates for genomes, as determined by CheckM (v1.1.3; ‘lineage_wf’), are 93.45%–94.46%, with 2.03–3.83% estimated contamination. Genome assemblies range between 4.23 Mbp–4.36 Mbp, comprising 576–699 contigs, with a G+C content of 67.46%–67.60%. Estimated complete genome sizes from CheckM range between 4.52–4.62 Mbp. ANI and AAI values between these genomes are 99.2%–100% and 99.6–100%, respectively, while such pairwise comparisons to closely related taxa are below 80.9% and 77.9%, respectively. Phylogenomic analysis of 72 conserved alphaproteobacterial single-copy genes places this species in the genus Acaudatibacter, in the family Caulobacteraceae. The species corresponds to GTDB taxonomy (R220) species “Palsa-881 sp903870555”.\n\nGenomes lack multiple genes for flagellar motility, chemotaxis, holdfast adhesin production, and for the caulobacterial obligate dimorphic cell developmental program. Genomes contain genes for type IV tight-adhesion pili; for carotenoid pigment production; for complete biosynthesis pathways of all standard amino acids; for aerobic respiration using cytochrome c oxidases cytochrome aa3 (coxABC) and cytochrome cbb3 (ccoNOPQ), and ubiquinol oxidase cytochrome bd (cydABX); for thiosulfate oxidation using the thiosulfate dehydrogenase TsdA; for sulfide oxidation using the Sqr sulfide:quinone oxidoreductase; for biosynthesis and degradation of polyphosphate, polyhydroxybutyrate, and starch/glycogen; and for the high-affinity PstABCS phosphate, PhnDEC phosphonate, and SsuABC sulfonate transporters. In addition, they have partial genetic potential for photoautotrophy, containing genes for type II anoxygenic photosynthesis using a light-harvesting II (LH2) complex and a reaction center–light-harvesting I supercomplex (RC–LH1), as well as partial genetic potential for carbon fixation using the Calvin-Benson-Bassham (CBB) cycle. The species has been detected in both oxic and anoxic strata of stratified freshwater bodies in Canada, Finland, and Sweden. Likely a psychrophilic/mesophilic facultative anaerobe, based on its genetic repertoire and environmental distribution.\n\nThe proposed nomenclatural type for the species is the genome Ki1-2-2m_bin-386^Ts, available under the NCBI WGS assembly accession number GCA_903870555.1^Ts (BioProject ID PRJEB38681), recovered 24 July 2018 from a stratified lake in Kiruna, Sweden (lat. 67.93, long. 20.36; from the metagenome ERS4600419). It comprises 692 contigs with a total of 4,349,168 bp, and has an estimated completeness of 94.45% and contamination of 2.03%.","html":"\u003cdiv\u003eFour metagenome-assembled genomes representing this species were assembled from sequence data obtained from samples taken from anoxic strata of a lake in Kiruna (Sweden), referred to as Ki1. Completeness estimates for genomes, as determined by CheckM (v1.1.3; ‘lineage_wf’), are 93.45%–94.46%, with 2.03–3.83% estimated contamination. Genome assemblies range between 4.23 Mbp–4.36 Mbp, comprising 576–699 contigs, with a G+C content of 67.46%–67.60%. Estimated complete genome sizes from CheckM range between 4.52–4.62 Mbp. ANI and AAI values between these genomes are 99.2%–100% and 99.6–100%, respectively, while such pairwise comparisons to closely related taxa are below 80.9% and 77.9%, respectively. Phylogenomic analysis of 72 conserved alphaproteobacterial single-copy genes places this species in the genus \u003cem\u003eAcaudatibacter\u003c/em\u003e, in the family \u003cem\u003eCaulobacteraceae\u003c/em\u003e. The species corresponds to GTDB taxonomy (R220) species “Palsa-881 sp903870555”.\u003cbr\u003e\u003cbr\u003eGenomes lack multiple genes for flagellar motility, chemotaxis, holdfast adhesin production, and for the caulobacterial obligate dimorphic cell developmental program. Genomes contain genes for type IV tight-adhesion pili; for carotenoid pigment production; for complete biosynthesis pathways of all standard amino acids; for aerobic respiration using cytochrome \u003cem\u003ec\u003c/em\u003e oxidases cytochrome \u003cem\u003eaa\u003c/em\u003e3 (\u003cem\u003ecoxABC\u003c/em\u003e) and cytochrome \u003cem\u003ecbb\u003c/em\u003e3 (\u003cem\u003eccoNOPQ\u003c/em\u003e), and ubiquinol oxidase cytochrome \u003cem\u003ebd \u003c/em\u003e(\u003cem\u003ecydABX\u003c/em\u003e); for thiosulfate oxidation using the thiosulfate dehydrogenase TsdA; for sulfide oxidation using the Sqr sulfide:quinone oxidoreductase; for biosynthesis and degradation of polyphosphate, polyhydroxybutyrate, and starch/glycogen; and for the high-affinity PstABCS phosphate, PhnDEC phosphonate, and SsuABC sulfonate transporters. In addition, they have partial genetic potential for photoautotrophy, containing genes for type II anoxygenic photosynthesis using a light-harvesting II (LH2) complex and a reaction center–light-harvesting I supercomplex (RC–LH1), as well as partial genetic potential for carbon fixation using the Calvin-Benson-Bassham (CBB) cycle. The species has been detected in both oxic and anoxic strata of stratified freshwater bodies in Canada, Finland, and Sweden. Likely a psychrophilic/mesophilic facultative anaerobe, based on its genetic repertoire and environmental distribution.\u003cbr\u003e\u003cbr\u003eThe proposed nomenclatural type for the species is the genome Ki1-2-2m_bin-386^Ts, available under the NCBI WGS assembly accession number GCA_903870555.1^Ts (BioProject ID PRJEB38681), recovered 24 July 2018 from a stratified lake in Kiruna, Sweden (lat. 67.93, long. 20.36; from the metagenome ERS4600419). It comprises 692 contigs with a total of 4,349,168 bp, and has an estimated completeness of 94.45% and contamination of 2.03%.\u003c/div\u003e"},"formal_styling":{"raw":"Acaudatibacter boreus Hallgren et al., 2025 (priority 2026)","html":"\u003cspan data-type=name data-value=\"Acaudatibacter boreus\" data-id=\"49711\" data-validated=1 data-correct=1 data-candidatus=0\u003e\u003ci\u003eAcaudatibacter boreus\u003c/i\u003e\u003c/span\u003e Hallgren et al., 2025 (priority 2026)"},"etymology":"L. masc. adj. boreus, northern, referring to the recovery of genomes of the organism from northern freshwater bodies","nomenclatural_type":{"class":"NCBI Assembly","id":3255,"url":"https://api.seqco.de/v1/genomes/3255.json","uri":"https://seqco.de/g:3255","display":"NCBI Assembly: GCA_903870555.1"},"proposed_in":{"id":4535,"citation":"Hallgren et al., 2025, Nature Communications","doi":"10.1038/s41467-025-65642-x","url":"https://api.seqco.de/v1/publications/4535.json"},"classification":[{"id":753,"name":"Bacteria","rank":"domain","status_name":"Valid (ICNP)","priority_date":null,"nomenclatural_type":{"class":"Name","id":3437,"url":"https://api.seqco.de/v1/names/3437.json","uri":"https://seqco.de/i:3437","display":"Bacillus"},"created_at":"2021-09-30T17:32:32.936Z","updated_at":"2024-12-13T10:36:54.606Z","url":"https://api.seqco.de/v1/names/753.json","uri":"https://seqco.de/i:753"},{"id":791,"name":"Pseudomonadota","rank":"phylum","status_name":"Valid (ICNP)","priority_date":null,"nomenclatural_type":{"class":"Name","id":16834,"url":"https://api.seqco.de/v1/names/16834.json","uri":"https://seqco.de/i:16834","display":"Pseudomonas"},"created_at":"2021-10-22T14:21:06.631Z","updated_at":"2024-06-09T13:41:43.183Z","url":"https://api.seqco.de/v1/names/791.json","uri":"https://seqco.de/i:791"},{"id":847,"name":"Alphaproteobacteria","rank":"class","status_name":"Valid (ICNP)","priority_date":null,"nomenclatural_type":{"class":"Name","id":4750,"url":"https://api.seqco.de/v1/names/4750.json","uri":"https://seqco.de/i:4750","display":"Caulobacter"},"created_at":"2021-10-22T14:21:07.612Z","updated_at":"2024-12-30T01:54:14.378Z","url":"https://api.seqco.de/v1/names/847.json","uri":"https://seqco.de/i:847"},{"id":1956,"name":"Caulobacterales","rank":"order","status_name":"Valid (ICNP)","priority_date":null,"nomenclatural_type":{"class":"Name","id":4750,"url":"https://api.seqco.de/v1/names/4750.json","uri":"https://seqco.de/i:4750","display":"Caulobacter"},"created_at":"2021-10-22T14:22:07.655Z","updated_at":"2024-12-30T01:55:00.972Z","url":"https://api.seqco.de/v1/names/1956.json","uri":"https://seqco.de/i:1956"},{"id":2917,"name":"Caulobacteraceae","rank":"family","status_name":"Valid (ICNP)","priority_date":null,"nomenclatural_type":{"class":"Name","id":4750,"url":"https://api.seqco.de/v1/names/4750.json","uri":"https://seqco.de/i:4750","display":"Caulobacter"},"created_at":"2021-10-22T14:22:50.949Z","updated_at":"2024-12-30T01:54:52.395Z","url":"https://api.seqco.de/v1/names/2917.json","uri":"https://seqco.de/i:2917"},{"id":49710,"name":"Acaudatibacter","rank":"genus","status_name":"Valid (SeqCode)","priority_date":"2026-05-11T17:58:19.127Z","nomenclatural_type":{"class":"Name","id":49709,"url":"https://api.seqco.de/v1/names/49709.json","uri":"https://seqco.de/i:49709","display":"Acaudatibacter aquilonius"},"created_at":"2025-02-10T12:14:30.437Z","updated_at":"2026-05-11T18:02:50.888Z","url":"https://api.seqco.de/v1/names/49710.json","uri":"https://seqco.de/i:49710"}],"children":[],"register":{"acc_url":"seqco.de/r:9aocwnme","title":"Register list for 4 new names including Acaudatibacter gen. nov.","priority_date":"2026-05-11T17:58:19.127Z","url":"https://api.seqco.de/v1/registers/r:9aocwnme.json","uri":"https://seqco.de/r:9aocwnme"},"created_at":"2025-02-10T12:27:28.514Z","updated_at":"2026-05-11T18:02:50.912Z"}