Ferredoxin

Definition

Ferredoxin is a small iron-sulfur protein that mediates electron transfer in various metabolic reactions. It plays a crucial role in microbial redox reactions, influencing cellular processes and microbial growth.

5 Must Know Facts For Your Next Test

1. Ferredoxin participates in electron transport chains within microorganisms.
2. It is essential for the activation of nitrogenase, which is key in nitrogen fixation.
3. Ferredoxins are involved in photosynthetic electron transport in certain bacteria.
4. They act as electron donors to enzymes like nitrite reductase and hydrogenase.
5. The redox potential of ferredoxin makes it suitable for participating in multiple biochemical pathways.

Review Questions

• What role does ferredoxin play in microbial electron transport chains?
• How does ferredoxin contribute to nitrogen fixation?
• Name one enzyme that uses ferredoxin as an electron donor.

Related terms

Cytochrome: A heme protein involved in electron transport and energy production.

Nitrogenase: An enzyme complex responsible for the reduction of atmospheric nitrogen to ammonia.

Redox Potential:

The tendency of a chemical species to acquire electrons and be reduced.