Anammox Biochemistry: a Tale of Heme c Proteins

详细信息    查看全文

• 作者：Boran Kartal¹ ; ^{bkartal@mpi-bremen.de" class="auth_mail" title="E-mail the corresponding author} ; Jan T. Keltjens²
• 关键词：anammox ; hydrazine ; nitric oxide ; heme proteins
• 刊名：Trends in Biochemical Sciences
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：41
• 期：12
• 页码：998-1011
• 全文大小：5052 K

文摘

Anaerobic ammonium-oxidizing (anammox) bacteria are one of the latest scientific discoveries in the biogeochemical nitrogen cycle. These microorganisms are able to oxidize ammonium (NH₄⁺) with nitrite (NO₂⁻) as the oxidant instead of oxygen and form dinitrogen (N₂) as the end product. Recent research has shed a light on the biochemistry underlying anammox metabolism with two key intermediates, nitric oxide (NO) and hydrazine (N₂H₄). Substrates and intermediates are converted exploiting the catalytic and electron-transfer potentials of c-type heme proteins known from numerous biochemical reactions and that have acquired new functionality in anammox biochemistry. On a global scale, anammox bacteria significantly contribute to the removal of fixed nitrogen from the environment and the process finds rapidly increasing interest in wastewater treatment.