Iron-sulfur Proteins
Iron-sulfur Proteins - Related Videos
01:22
The Sulfur Cycle
0 Views •
2019
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
08:45
Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
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Cited by 3 •
2022
This article demonstrates how to prepare and administer transferrin-bound nonradioactive isotopic iron for studies of iron transport in mouse pregnancy. The approach for quantifying isotopic iron in fetoplacental compartments is also described.
01:20
Sulfur Assimilation
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2025
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
09:15
Synthesis of Ligand-free CdS Nanoparticles within a Sulfur Copolymer Matrix
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2016
Herein we present a method to synthesize ligand-free cadmium sulfide (CdS) nanoparticles based on a unique sulfur copolymer. The sulfur copolymer operates as a high temperature solvent and a sulfur source during the nanoparticle synthesis and stabilizes the nanoparticles after the reaction.
01:29
Microbes and the Sulfur Cycle
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2026
Sulfur is a vital element in Earth's biogeochemical systems. It transitions through various inorganic states, including sulfate (SO₄²⁻), elemental sulfur (S⁰), and sulfide (S²⁻). Abiotic and biological mechanisms across oxic and anoxic environments intricately mediate these transformations. Sulfate, the most oxidized form of sulfur, is predominantly stored in rocks, marine sediments, and oceanic waters, acting as a long-term reservoir in the global sulfur cycle.In oxic environments,...
FAQs
An iron-sulfur cluster’s coordination environment determines how its iron centers participate in cellular chemistry. Amino acid residues such as cysteine hold the cluster within the protein, while the cluster can change oxidation state or interact with a substrate. These properties allow different iron-sulfur proteins to support electron transfer, catalysis, or sensing.
Redox switching provides a mechanism for coupling protein activity to the cell’s chemical state. Because iron-sulfur clusters can move between oxidation states, a protein may participate in electron-transfer reactions or contribute to regulatory responses as conditions change. This flexibility explains why the same cofactor class can contribute to both metabolism and cellular sensing.
Cluster assembly and trafficking are central to function because a protein must receive its cofactor in a usable form and location. Investigating these processes reveals how cells manage iron and sulfur resources before the cofactor reaches its target protein. Disruption at either stage can impair multiple pathways rather than only one enzyme.
Iron-sulfur proteins support energy-related electron flow in both mitochondrial respiration and photosynthetic electron transport. In these settings, their clusters help transfer electrons through the relevant biological systems. Examining their placement and activity in these pathways can therefore connect cofactor behavior with how cells organize electron-transfer processes.
Iron-sulfur proteins are relevant to DNA synthesis and genome stability, extending their importance beyond energy-related pathways. Their study can help connect cofactor assembly, trafficking, or activity with the maintenance of genetic information. This context is especially useful when investigating how failures in metal-cofactor management may affect cellular function.
Defects in iron-sulfur cluster systems can have broad consequences because these cofactors serve several cellular pathways. Problems with assembly, trafficking, or protein function may disturb mitochondrial respiration, DNA synthesis, genome stability, or cellular sensing. Studying these links helps researchers relate molecular cofactor defects to disrupted metabolism and disease-associated biology.