Composition and role of extracellular polymers in methanogenic granules.

Applied and Environmental Microbiology
M C VeigaJ G Zeikus

Abstract

Methanobacterium formicicum and Methanosarcina mazeii are two prevalent species isolated from an anaerobic granular consortium grown on a fatty acid mixture. The extracellular polysaccharides (EPS) were extracted from Methanobacterium formicicum and Methanosarcina mazeii and from the methanogenic granules to examine their role in granular development. The EPS made up approximately 20 to 14% of the extracellular polymer extracted from the granules, Methanobacterium formicicum, and Methanosarcina mazeii. The EPS produced by Methanobacterium formicicum was composed mainly of rhamnose, mannose, galactose, glucose, and amino sugars, while that produced by Methanosarcina mazeii contained ribose, galactose, glucose, and glucosamine. The same sugars were also present in the EPS produced by the granules. These results indicate that the two methanogens, especially Methanobacterium formicicum, contributed significantly to the production of the extracellular polymer of the anaerobic granules. Growth temperature, substrates (formate and H(inf2)-CO(inf2)), and the key nutrients (nitrogen and phosphate concentrations) affected polymer production by Methanobacterium formicicum.

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Citations

Sep 11, 2007·Water Environment Research : a Research Publication of the Water Environment Federation·A A L ZinatizadehM Hasnain Isa
Feb 22, 2002·Biotechnology and Bioengineering·Herbert H P FangTong Zhang
Jan 5, 2020·Bioscience, Biotechnology, and Biochemistry·Kana SumikawaMamoru Yamada
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Nov 13, 2004·Biotechnology and Bioengineering·Jian-jun ZhangBruce E Logan
Dec 24, 2013·Environmental Science. Processes & Impacts·Alicia A TaylorSharon L Walker
May 8, 2018·Environmental Science and Pollution Research International·Itzel Covarrubias-GarcíaSonia Arriaga
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Nov 30, 2010·Journal of Hazardous Materials·Dawen GaoWei-Min Wu
Jan 5, 2011·Acta Biomaterialia·Kateryna BazakaElena P Ivanova

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