Related Experiment Video
Updated: Jun 28, 2025

Extraction of Cofactor F420 for Analysis of Polyglutamate Tail Length from Methanogenic Pure Cultures and Environmental Samples
Published on: October 14, 2021
Shared functions of Fe-S cluster assembly and Moco biosynthesis
Muhammad Abrar Hasnat1, Silke Leimkühler1
1University of Potsdam, Institute of Biochemistry and Biology, Department of Molecular Enzymology, Karl-Liebknecht Str. 24-25, 14476 Potsdam-Golm, Germany.
Molybdenum cofactor (Moco) biosynthesis relies on iron-sulfur (Fe-S) clusters. This review details how Fe-S cluster availability, gene regulation by FNR, and sulfur delivery impact Moco production and active molybdoenzymes.
Area of Science:
- Biochemistry
- Molecular Biology
- Microbiology
Background:
- Molybdenum cofactor (Moco) biosynthesis is essential for numerous enzymes.
- Iron-sulfur (Fe-S) clusters are increasingly recognized as critical for Moco production.
- Several proteins and regulatory factors are involved in this complex pathway.
Purpose of the Study:
- To review the intricate dependence of Moco biosynthesis on Fe-S cluster availability.
- To elucidate the roles of specific proteins and regulatory mechanisms in Moco production.
- To highlight the interplay between iron availability, gene expression, and enzyme function.
Main Methods:
- Literature review focusing on Moco biosynthesis pathways.
- Analysis of the roles of key proteins like MoaA and IscS.
- Examination of regulatory mechanisms involving FNR, ArcA, and Fur.
Main Results:
- MoaA protein directly binds Fe-S clusters.
- FNR regulates gene expression based on oxygen availability via Fe-S clusters.
- IscS facilitates sulfur transfer essential for Fe-S cluster assembly and Moco synthesis.
- Iron availability impacts molybdoenzyme abundance, with FNR, ArcA, and Fur playing crucial regulatory roles.
Conclusions:
- Moco biosynthesis is tightly linked to cellular Fe-S cluster status.
- Gene expression and sulfur delivery are key regulatory points influenced by environmental factors like iron and oxygen.
- Understanding these connections is vital for comprehending the function of essential molybdoenzymes.
More Related Videos
Related Concept Videos
Protein Complex Assembly
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Role of Reduced Coenzymes NADH and FADH₂
Ribosomal RNA Synthesis
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
The Supercomplexes in the Crista Membrane
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
Electron Transport Chain: Complex I and II
ROS generation is regulated and maintained at moderate levels necessary...

