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2017 Fiscal Year Final Research Report

Multistep syntrophy in the degradation of amino acids and branched-chain fatty acids in anaerobic ecosystem

Research Project

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Project/Area Number 15H05331
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Environmental dynamic analysis
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Narihiro Takashi  国立研究開発法人産業技術総合研究所, 生命工学領域, 主任研究員 (20421844)

Research Collaborator YAMADA Masayoshi  鹿児島工業高等専門学校, 都市環境デザイン工学科, 准教授 (80469593)
KURODA Kyohei  都城工業高等専門学校, 物質工学科, 助教 (50783213)
NOBU Masaru  国立研究開発法人産業技術総合研究所, 生物プロセス研究部門, 研究員 (40805644)
LIU Wen-Tso  イリノイ大学, 土木環境工学系, 教授
LEE Po-Heng  香港理工大学, 土木環境工学系, 助教
TANG Yueqin  四川大学, 環境工学系, 教授
Project Period (FY) 2015-04-01 – 2018-03-31
Keywords微生物ゲノム / 廃水処理 / メタゲノム / アミノ酸
Outline of Final Research Achievements

Metagenomic analysis of a methanogenic microbial community in an anaerobic bioreactor treating amino acid-containing wastewater revealed synergistic metabolic network of syntrophic substrate-oxidizing bacteria, methanogens, and functionally unknown microorganisms. A laboratory-scale upflow anaerobic sludge blanket reactor fed with wastewater discharged from soy sauce processing manufactory was operated at 20°C. We successfully recovered metagenomic bins of dominant microbes in the reactor. Metabolic reconstruction suggested that dominant microorganisms perform fermentative and syntrophic degradation of amino acids and catabolic by-products facilitated by various energy conservation systems. Thus, diverse anaerobic organisms may unite to form a metabolic network to perform complete degradation of amino acids in the methanogenic microbiota.

Free Research Field

環境微生物学

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Published: 2019-03-29  

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