A novel Methylomirabilota methanotroph potentially couples methane oxidation to iodate reduction  

作　　者：Baoli Zhu Clemens Karwautz Stefan Andrei Andreas Klingl Jakob Pernthaler Tillmann Lueders 

机构地区：[1]Key Laboratory of Agro‐Ecological Processes in Subtropical Regions,Taoyuan Agroecosystem Research Station,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha,China [2]Chair of Ecological Microbiology,Bayreuth Center of Ecology and Environmental Research(BayCEER),University of Bayreuth,Bayreuth,Germany [3]Department of Plant and Microbial Biology,Limnological Station,University of Zurich,Zurich,Switzerland [4]Department of Limnology and Bio‐Oceanography,University of Vienna,Vienna,Austria [5]Biocenter of the LMU Munich,Plant Development&Electron Microscopy,Planegg‐Martinsried,Germany

出　　处：《mLife》2022年第3期323-328,共6页微生物（英文）

基　　金：Baoli Zhu was supported by the National Natural Science Foundation of China(42177104);This research was also supported by the European Research Council(ERC)under the European Union's Seventh Framework Program(FP7/2007‐2013);grant agreement 616644(POLLOX)to Tillmann Lueders.Metagenomic sequencing was done via a Census of Deep Life(CoDL)metagenome project awarded by the Deep Carbon Observatory(DCO)under the project name DCO_LUE.

摘　　要：Impact statement Methane oxidizing microbes play a key role in reducing the emission of this potent greenhouse gas to the atmosphere.The known versatility of the recently discovered anaerobic Methylomirabilota methanotrophs is limited.Here,we report a novel uncultured Methylomirabilis species,Candidatus Methylomirabilis iodofontis,with the genetic potential of iodate respiration from biofilm in iodine‐rich cavern spring water.Star‐like cells resembling Methylomirabilis oxyfera were directly observed from the biofilm and a high‐quality metagenome‐assembled genome(MAG)of Ca.M.iodofontis was assembled.In addition to oxygenic denitrification and aerobic methane oxidation pathways,the M.iodofontis MAG also indicated its iodate‐reducing potential,a capability that would enable the bacterium to use iodate other than nitrite as an electron acceptor,a hitherto unrecognized metabolic potential of Methylomirabilota methanotrophs.The results advance the current understanding of the ecophysiology of anaerobic Methylomirabilota methanotrophs and may suggest an additional methane sink,especially in iodate‐rich ecosystems.

关 键 词：METHANE STATEMENT IODINE 

分 类 号：O62[理学—有机化学]