PMID- 36372432 OWN - NLM STAT- MEDLINE DCOM- 20221115 LR - 20230104 IS - 1347-4405 (Electronic) IS - 1342-6311 (Print) IS - 1342-6311 (Linking) VI - 37 IP - 4 DP - 2022 TI - Novel Cross-domain Symbiosis between Candidatus Patescibacteria and Hydrogenotrophic Methanogenic Archaea Methanospirillum Discovered in a Methanogenic Ecosystem. LID - 10.1264/jsme2.ME22063 [doi] LID - ME22063 AB - To identify novel cross-domain symbiosis between Candidatus Patescibacteria and Archaea, we performed fluorescence in situ hybridization (FISH) on enrichment cultures derived from methanogenic bioreactor sludge with the newly designed 32-520-1066 probe targeting the family-level uncultured clade 32-520/UBA5633 lineage in the class Ca. Paceibacteria. All FISH-detectable 32-520/UBA5633 cells were attached to Methanospirillum, indicating high host specificity. Transmission electron microscopy observations revealed 32-520/UBA5633-like cells that were specifically adherent to the plug structure of Methanospirillum-like rod-shaped cells. The metagenome-assembled genomes of 32-520/UBA5633 encoded unique gene clusters comprising pilin signal peptides and type IV pilins. These results provide novel insights into unseen symbiosis between Ca. Patescibacteria and Archaea. FAU - Kuroda, Kyohei AU - Kuroda K AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). FAU - Kubota, Kengo AU - Kubota K AD - Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University. AD - Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University. FAU - Kagemasa, Shuka AU - Kagemasa S AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). AD - Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University. FAU - Nakai, Ryosuke AU - Nakai R AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). FAU - Hirakata, Yuga AU - Hirakata Y AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). FAU - Yamamoto, Kyosuke AU - Yamamoto K AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). FAU - Nobu, Masaru K AU - Nobu MK AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). FAU - Narihiro, Takashi AU - Narihiro T AD - Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST). LA - eng PT - Journal Article PL - Japan TA - Microbes Environ JT - Microbes and environments JID - 9710937 RN - 0 (RNA, Ribosomal, 16S) SB - IM MH - *Archaea/genetics MH - Methanospirillum/genetics MH - Symbiosis MH - Ecosystem MH - In Situ Hybridization, Fluorescence MH - Phylogeny MH - *Euryarchaeota MH - Bacteria/genetics MH - RNA, Ribosomal, 16S/genetics PMC - PMC9763046 OTO - NOTNLM OT - 32-520/UBA5633 OT - Candidate Phyla Radiation (CPR) superphylum OT - Candidatus Patescibacteria OT - Methanospirillum OT - cross-domain symbiosis EDAT- 2022/11/14 06:00 MHDA- 2022/11/16 06:00 PMCR- 2022/01/01 CRDT- 2022/11/13 20:23 PHST- 2022/11/13 20:23 [entrez] PHST- 2022/11/14 06:00 [pubmed] PHST- 2022/11/16 06:00 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - DN/JST.JSTAGE/jsme2/ME22063 [pii] AID - 10.1264/jsme2.ME22063 [doi] PST - ppublish SO - Microbes Environ. 2022;37(4):ME22063. doi: 10.1264/jsme2.ME22063.