PMID- 28390307 OWN - NLM STAT- MEDLINE DCOM- 20170505 LR - 20171201 IS - 1879-2448 (Electronic) IS - 0043-1354 (Linking) VI - 116 DP - 2017 Jun 1 TI - Comammox in drinking water systems. PG - 332-341 LID - S0043-1354(17)30225-7 [pii] LID - 10.1016/j.watres.2017.03.042 [doi] AB - The discovery of complete ammonia oxidizer (comammox) has fundamentally upended our perception of the global nitrogen cycle. Here, we reported four metagenome assembled genomes (MAGs) of comammox Nitrospira that were retrieved from metagenome datasets of tap water in Singapore (SG-bin1 and SG-bin2), Hainan province, China (HN-bin3) and Stanford, CA, USA (ST-bin4). Genes of phylogenetically distinct ammonia monooxygenase subunit A (amoA) and hydroxylamine dehydrogenase (hao) were identified in these four MAGs. Phylogenetic analysis based on ribosomal proteins, AmoA, hao and nitrite oxidoreductase (subunits nxrA and nxrB) sequences indicated their close relationships with published comammox Nitrospira. Canonical ammonia-oxidizing microbes (AOM) were also identified in the three tap water samples, ammonia-oxidizing bacteria (AOB) in Singapore's and Stanford's samples and ammonia-oxidizing archaea (AOA) in Hainan's sample. The comammox amoA-like sequences were also detected from some other drinking water systems, and even outnumbered the AOA and AOB amoA-like sequences. The findings of MAGs and the occurrences of AOM in different drinking water systems provided a significant clue that comammox are widely distributed in drinking water systems. CI - Copyright (c) 2017 Elsevier Ltd. All rights reserved. FAU - Wang, Yulin AU - Wang Y AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Ma, Liping AU - Ma L AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Mao, Yanping AU - Mao Y AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Jiang, Xiaotao AU - Jiang X AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Xia, Yu AU - Xia Y AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Yu, Ke AU - Yu K AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Li, Bing AU - Li B AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. FAU - Zhang, Tong AU - Zhang T AD - Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. Electronic address: zhangt@hku.hk. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170320 PL - England TA - Water Res JT - Water research JID - 0105072 RN - 0 (Drinking Water) RN - 7664-41-7 (Ammonia) RN - EC 1.- (Oxidoreductases) SB - IM MH - Ammonia/metabolism MH - Archaea/genetics MH - Bacteria/metabolism MH - Drinking Water/*metabolism MH - Molecular Sequence Data MH - Oxidation-Reduction MH - Oxidoreductases/genetics MH - *Phylogeny OTO - NOTNLM OT - Comammox OT - Drinking water systems OT - Metagenomics EDAT- 2017/04/09 06:00 MHDA- 2017/05/06 06:00 CRDT- 2017/04/09 06:00 PHST- 2016/10/29 00:00 [received] PHST- 2017/03/18 00:00 [revised] PHST- 2017/03/18 00:00 [accepted] PHST- 2017/04/09 06:00 [pubmed] PHST- 2017/05/06 06:00 [medline] PHST- 2017/04/09 06:00 [entrez] AID - S0043-1354(17)30225-7 [pii] AID - 10.1016/j.watres.2017.03.042 [doi] PST - ppublish SO - Water Res. 2017 Jun 1;116:332-341. doi: 10.1016/j.watres.2017.03.042. Epub 2017 Mar 20.