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Heterocyst Thylakoid Bioenergetics
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
2019 (English)In: LIFE-BASEL, ISSN 2075-1729, Vol. 9, no 1, article id 13Article, review/survey (Refereed) Published
Abstract [en]

Heterocysts are specialized cells that differentiate in the filaments of heterocystous cyanobacteria. Their role is to maintain a microoxic environment for the nitrogenase enzyme during diazotrophic growth. The lack of photosynthetic water oxidation in the heterocyst puts special constraints on the energetics for nitrogen fixation, and the electron transport pathways of heterocyst thylakoids are slightly different from those in vegetative cells. During recent years, there has been a growing interest in utilizing heterocysts as cell factories for the production of fuels and other chemical commodities. Optimization of these production systems requires some consideration of the bioenergetics behind nitrogen fixation. In this overview, we emphasize the role of photosynthetic electron transport in providing ATP and reductants to the nitrogenase enzyme, and provide some examples where heterocysts have been used as production facilities.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 9, no 1, article id 13
Keywords [en]
cyanobacteria, thylakoid, photosynthesis nitrogen fixation, ferredoxin, biofuel
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:uu:diva-382801DOI: 10.3390/life9010013ISI: 000464137000001PubMedID: 30691012OAI: oai:DiVA.org:uu-382801DiVA, id: diva2:1313372
Available from: 2019-05-03 Created: 2019-05-03 Last updated: 2019-05-03Bibliographically approved

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