Genome of an endosymbiont coupling N2 fixation to cellulolysis within protist cells in termite gut

Yuichi Hongoh, Vineet K. Sharma, Tulika Prakash, Satoko Noda, Hidehiro Toh, Todd D. Taylor, Toshiaki Kudo, Yoshiyuki Sakaki, Atsushi Toyoda, Masahira Hattori, Moriya Ohkuma

研究成果: Contribution to journalArticle査読

142 被引用数 (Scopus)

抄録

Termites harbor diverse symbiotic gut microorganisms, the majority of which are as yet uncultivable and their interrelationships unclear. Here, we present the complete genome sequence of the uncultured Bacteroidales endosymbiont of the cellulolytic protist Pseudotrichonympha grassii, which accounts for 70% of the bacterial cells in the gut of the termite Coptotermes formosanus. Functional annotation of the chromosome (1,114,206 base pairs) unveiled its ability to fix dinitrogen and recycle putative host nitrogen wastes for biosynthesis of diverse amino acids and cofactors, and import glucose and xylose as energy and carbon sources. Thus, nitrogen fixation and cellulolysis are coupled within the protist's cells. This highly evolved symbiotic system probably underlies the ability of the worldwide pest termites Coptotermes to use wood as their sole food.

本文言語英語
ページ(範囲)1108-1109
ページ数2
ジャーナルScience
322
5904
DOI
出版ステータス出版済み - 11 14 2008
外部発表はい

All Science Journal Classification (ASJC) codes

  • 一般

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