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Mechanism of Mo-Dependent Nitrogenase

Open access
Seefeldt, Lance C., Hoffman, Brian M., Dean, Dennis R.·2009·Annual Review of Biochemistry

Abstract

Nitrogen-fixing bacteria catalyze the reduction of dinitrogen (N 2) to two ammonia molecules (NH 3), the major contribution of fixed nitrogen to the biogeochemical nitrogen cycle. The most widely studied nitrogenase is the molybdenum (Mo)-dependent enzyme. The reduction of N 2 by this enzyme involves the transient interaction of two component proteins, designated the iron (Fe) protein and the MoFe protein, and minimally requires 16 magnesium ATP (MgATP), eight protons, and eight electrons. The current state of knowledge on how these proteins and small molecules together effect the reduction of N 2 to ammonia is reviewed. Included is a summary of the roles of the Fe protein and MgATP hydrolysis, information on the roles of the two metal clusters contained in the MoFe protein in catalysis, insights gained from recent success in trapping substrates and inhibitors at the active-site metal cluster FeMo cofactor, and finally, considerations of the mechanism of N 2 reduction catalyzed by nitrogenase.

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Crossref · 10.1146/annurev.biochem.78.070907.103812

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Metadata

Authors
Seefeldt, L. C., Hoffman, B. M., & Dean, D. R.
Venue
Annual Review of Biochemistry
Published
2009-06-01
Volume
78
Issue
1
Pages
701-722
ISSN
  • 0066-4154 (ISSN-L)
  • 1545-4509
OpenAlex
W2104684144
Cited by
682
References
1
FWCI
1.85
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Mechanism of Mo-Dependent Nitrogenase. https://app.cochat.ai/papers/10.1146/annurev.biochem.78.070907.103812
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Seefeldt, L. C., Hoffman, B. M., & Dean, D. R. (2009). Mechanism of Mo-Dependent Nitrogenase. Annual Review of Biochemistry. https://doi.org/10.1146/annurev.biochem.78.070907.103812

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