Candidatus Contendobacter

Genus nameCandidatus Contendobacter
SourcePublished
Alternative namesGB5 + GB6 + GB7 (combined), "Ca. Competibacter" (part of)
NCBI taxonomy ID1400859

Taxonomy

KingdomBacteria

16S gene copy number2
GenomesYes2

 In situOther
Filamentous56
Hydrophobic cell surface


Composite FISH image of activated sludge. Yellow = "Competibacteraceae"; Blue = Ca. Accumulibacter; Green = other cells. Scale bar = 10 microns. - Source:1

Aerobic heterotroph
GAO
Nitrite reduction
Fatty acids

POSNEGVariableNot assessed

Description

The originally defined "Ca. Competibacter" genus has been split. What was originally known as sub-group GB1 has essentially been redefined to represent the genus "Ca. Competibacter" 2. In situ behaviour is consistent with the GAO phenotype and they are thought to compete with the PAO for resources with their proliferation at the theoretical expense of EBPR efficiency 3 4. Members from the genus have not been demonstrated to denitrify in situ, utilizing nitrate, but not nitrite as an electron acceptor 3. However, genomic analysis of the species “Ca. C. denitrificans” indicates the potential for full denitrification to nitrogen 2. Members also appear to vary in their ability to assimilate thymidine and to ferment glucose, with single cell in situ analysis 3 2. Genome analysis of “Ca. C. denitrificans” reveals the potential for fermentation of glucose, and glycolysis via the Entner-Doudoroff (ED) and Embden-Mayerhof-Parnas (EMP) pathways.

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FISH probes

CPB832 + CPB992 5. Use CPB_992 alone for higher specificity.

Metabolism

 In situOther
Autotroph/Mixotroph2
AOB2
NOB2
Anammox2
Aerobic Heterotroph32
PAO32
GAO22
Nitrite Reduction32
Sulphate Reduction
Fermentation32
Acetogen
Methanogen2
Fatty Acids32
Sugars32
Proteins/Amino Acids3

Abundance Information

 10 % percentileMedian90 % percentile
Influent000
Activated Sludge000.3
Digester-Mesophilic000
Digester-Thermophilic000

Predominant InActivated sludge

References

[1] McIlroy SJ (2010) Phylogenetic Diversity and Ecophysiology of Alphaproteobacterial Glycogen Accumulating Organisms in Enhanced Biological Phosphorus Removal Activated Sludge Systems. PhD Thesis La Trobe University. - Mcilroy -

[2] McIlroy, Albertsen, Andresen, Saunders, Kristiansen, Stokholm-Bjerregaard, et al. - 'Candidatus Competibacter'-lineage genomes retrieved from metagenomes reveal functional metabolic diversity. - ISME J 8(3): 613-24. doi:10.1038/ismej.2013.162

[3] Kong, Xia, Nielsen, Nielsen - Ecophysiology of a group of uncultured Gammaproteobacterial glycogen-accumulating organisms in full-scale enhanced biological phosphorus removal wastewater treatment plants. - Environ. Microbiol. 8(3): 479-89. doi:10.1111/j.1462-2920.2005.00914.x

[4] Blackall, Crocetti, Saunders, Bond - A review and update of the microbiology of enhanced biological phosphorus removal in wastewater treatment plants. - Antonie Van Leeuwenhoek 81(1-4): 681-91.

[5] McIlroy, Nittami, Kanai, Fukuda, Saunders, Nielsen, et al. - Re-appraisal of the phylogeny and fluorescence in situ hybridization probes for the analysis of the Competibacteraceae in wastewater treatment systems. - Environ Microbiol Rep 7(2): 166-74. doi:10.1111/1758-2229.12215

[6] Kong, Ong, Ng, Liu - Diversity and distribution of a deeply branched novel proteobacterial group found in anaerobic-aerobic activated sludge processes. - Environ. Microbiol. 4(11): 753-7.

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The MiDAS taxonomy is a manual curation of the Silva database and is redistributed for non-commercial use only.

 

Citing MiDAS: McIlroy S.J., Saunders A.M., Albertsen M., Nierychlo M., McIlroy B., Hansen A.A., Karst S.M., Nielsen J.L., Nielsen P.H. (2015) MiDAS: the field guide to the microbes of activated sludge. Database, Vol. 2015

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