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Related Concept Videos

Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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Protein Complex Assembly02:41

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Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach
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Cytochrome c assembly.

Despoina A I Mavridou1, Stuart J Ferguson, Julie M Stevens

  • 1Department of Biochemistry, University of Oxford, South Parks Road, Oxford, UK.

IUBMB Life
|January 24, 2013
PubMed
Summary
This summary is machine-generated.

Cytochromes c are vital for energy transfer. This review details the complex heme attachment process, crucial for cytochrome c function in respiration and photosynthesis.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Respiration

Background:

  • Cytochromes c are essential heme-containing proteins involved in cellular energy transduction via electron transfer.
  • Heme attachment to cytochromes c is a complex post-translational modification requiring specific protein machinery.
  • Diverse systems for cytochrome c biogenesis exist across different organisms.

Purpose of the Study:

  • To summarize established models of cytochrome c biogenesis.
  • To present recent advancements in understanding the individual steps of heme attachment.
  • To consolidate knowledge on diverse cytochrome c biogenesis systems.

Main Methods:

  • Review of established classical models for cytochrome c biogenesis.
  • Synthesis of recent research findings on heme attachment pathways.
  • Comparative analysis of different cytochrome c biogenesis systems.

Main Results:

  • Detailed overview of the multi-step process: apocytochrome translocation, heme transport and provision, reduction, chaperoning, and thioether bond formation.
  • Highlighting the critical role of the CXXCH motif in heme binding.
  • Identification of diverse protein components and systems involved in these steps across organisms.

Conclusions:

  • Understanding cytochrome c biogenesis is key to comprehending energy transduction.
  • Recent progress has refined our knowledge of heme attachment mechanisms.
  • Further research into diverse biogenesis systems will illuminate evolutionary and functional aspects.