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Assembly of nitrogenase MoFe protein
Yilin Hu1, Aaron W Fay, Chi Chung Lee
1Department of Molecular Biology and Biochemistry, University of California, Irvine, California 92697-3900, USA. yilinh@uci.edu
The assembly of nitrogenase Mofe protein, crucial for nitrogen fixation, involves complex steps. Recent studies clarify the biosynthesis of the FeMoco cofactor and its integration into the protein complex.
Area of Science:
- Bioinorganic Chemistry
- Biochemistry
- Molecular Biology
Background:
- Nitrogenase Mofe protein assembly is a complex biological process.
- Previous genetic studies identified key factors but lacked mechanistic details.
- The biosynthesis of the iron-molybdenum cofactor (FeMoco) has been a long-standing puzzle.
Purpose of the Study:
- To review recent advances in understanding FeMoco biosynthesis.
- To elucidate the stepwise assembly of the nitrogenase Mofe protein.
- To detail the mechanism of FeMoco cofactor integration into the Mofe protein.
Main Methods:
- Characterization of assembly-related intermediates.
- Ex situ assembly studies of FeMoco on NifEN complex.
- In situ studies of P-cluster assembly on Mofe protein.
Main Results:
- Detailed mechanistic insights into FeMoco biosynthesis.
- Elucidation of FeMoco incorporation into the Mofe protein.
- Stepwise assembly pathway of the Mofe protein revealed.
Conclusions:
- Significant progress has been made in understanding nitrogenase Mofe protein assembly.
- The characterization of intermediates has opened the biosynthetic 'black box'.
- A clearer picture of FeMoco biosynthesis and integration is now available.
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