PMID- 10879983 OWN - NLM STAT- MEDLINE DCOM- 20001115 LR - 20061115 IS - 0723-2020 (Print) IS - 0723-2020 (Linking) VI - 23 IP - 1 DP - 2000 Apr TI - Molecular evidence for genus level diversity of bacteria capable of catalyzing anaerobic ammonium oxidation. PG - 93-106 AB - Recently, a bacterium capable to oxidize ammonium anaerobically at a high rate was identified as novel member of the Planctomycetales (Strous, M., Fuersi, J. A., Kramer, E. H. M., Logemann, S., Muyzer, G., van de Pas-Schoonen, K. T., Webb, R. I., Kufnen, J. G., and Jetten, M. S. M.: Nature 400, 446-449, 1999). Here we investigated the microbial community structure of a trickling filter biofilm with a high anaerobic ammonium oxidation activity. Fluorescence in situ hybridization (FISH) with a set of nine probes designed for specific identification of the recently described anaerobic ammonium oxidizer demonstrated that only one probe hybridized to bacteria within the biofilm. For phylogenetic characterization of putative biofilm anaerobic ammonium oxidizers a full-cycle 16S rDNA approach was performed by using a Planctomycetales-specific forward primer for PCR amplification. Of the twenty-five 16S rDNA fragments (1364 bp in length) amplified from the biofilm, nine were affiliated to the Planctomycetales. Comparative analysis showed that these sequences were more than 98.9% similar to each other but only distantly related to the previously recognized anaerobic ammonium oxidizer (below 91% similarity) and all other organisms represented in public 16S rRNA databases (similarities of below 79%). The retrieved sequences and the previously recognized anaerobic ammonium oxidizer represent two well-separated groups of a deep-branching lineage within the Planctomycetales. Quantitative FISH analysis with a newly designed specific probe showed that the novel bacterium, provisionally classified as "Candidatus Kuenenia stuttgartiensis" constituted the dominant fraction of the biofilm bacteria. In situ probing revealed that ammonia-oxidizing bacteria of the beta-subclass of Proteobacteria were also present, albeit in significant smaller amounts, within the anoxic biofilm. Comparative sequence analysis of a stretch of the gene encoding ammonia-monooxygenase (amoA) demonstrated the occurrence of the DNA of at least three different populations of beta-subclass ammonia oxidizers within the biofilm. FAU - Schmid, M AU - Schmid M AD - Lehrstuhl fur Mikrobiologie, Technische Universitat Munchen, Freising, Germany. FAU - Twachtmann, U AU - Twachtmann U FAU - Klein, M AU - Klein M FAU - Strous, M AU - Strous M FAU - Juretschko, S AU - Juretschko S FAU - Jetten, M AU - Jetten M FAU - Metzger, J W AU - Metzger JW FAU - Schleifer, K H AU - Schleifer KH FAU - Wagner, M AU - Wagner M LA - eng SI - GENBANK/AF202649 SI - GENBANK/AF202650 SI - GENBANK/AF202651 SI - GENBANK/AF202652 SI - GENBANK/AF202653 SI - GENBANK/AF202654 SI - GENBANK/AF202655 SI - GENBANK/AF202656 SI - GENBANK/AF202657 SI - GENBANK/AF202658 SI - GENBANK/AF202659 SI - GENBANK/AF202660 SI - GENBANK/AF202661 SI - GENBANK/AF202662 SI - GENBANK/AF202663 PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Syst Appl Microbiol JT - Systematic and applied microbiology JID - 8306133 RN - 0 (DNA, Bacterial) RN - 0 (DNA, Ribosomal) RN - 0 (Quaternary Ammonium Compounds) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Sewage) RN - EC 1.- (Oxidoreductases) RN - EC 1.7.3.- (ammonia monooxygenase) SB - IM MH - Anaerobiosis MH - Bacteria/*classification/*genetics/growth & development/metabolism MH - Biofilms MH - Bioreactors MH - DNA, Bacterial/analysis/genetics MH - DNA, Ribosomal/analysis/genetics MH - Filtration/instrumentation MH - In Situ Hybridization, Fluorescence MH - Molecular Sequence Data MH - Nitrosomonas/genetics MH - Oxidation-Reduction MH - Oxidoreductases/genetics MH - Phylogeny MH - Polymerase Chain Reaction MH - Quaternary Ammonium Compounds/*metabolism MH - RNA, Ribosomal, 16S/genetics MH - Sequence Analysis, DNA MH - Sewage/microbiology EDAT- 2000/07/06 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/07/06 11:00 PHST- 2000/07/06 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/07/06 11:00 [entrez] AID - S0723-2020(00)80050-8 [pii] AID - 10.1016/S0723-2020(00)80050-8 [doi] PST - ppublish SO - Syst Appl Microbiol. 2000 Apr;23(1):93-106. doi: 10.1016/S0723-2020(00)80050-8.