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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
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On Cellular Darwinism: Mitochondria.

Larry Bull1

  • 1University of the West of England.

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|December 10, 2015
PubMed
Summary
This summary is machine-generated.

Mitochondria and nucleus coevolution is explored using the NKCS model. The study reveals conditions for maintaining mitochondrial genetic diversity mirror those for the symbiotic origin of mitochondria.

Keywords:
Cellular DarwinismNKCS modelcoevolutioncytoplasmmitochondriaorganelle

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Area of Science:

  • Cell Biology
  • Evolutionary Biology
  • Genetics

Background:

  • Mitochondria play crucial cellular roles.
  • Understanding organelle-nucleus coevolution is vital.
  • Mitochondrial diversity is a key area of research.

Purpose of the Study:

  • To explore organelle-nucleus coevolution using the NKCS model.
  • To investigate the emergence of mitochondrial diversity.
  • To identify conditions for maintaining mitochondrial genetic variants.

Main Methods:

  • Utilized the NKCS model of coupled fitness landscapes.
  • Simulated intracellular evolutionary processes.
  • Varied the relative rate of mitochondrial evolution.

Main Results:

  • Mitochondrial diversity can emerge under simple intracellular evolution.
  • Conditions for maintaining multiple mitochondrial genetic variants were identified.
  • These conditions resemble those for the symbiotic origin of mitochondria.

Conclusions:

  • The NKCS model provides insights into organelle-nucleus coevolution.
  • Mitochondrial genetic diversity is influenced by evolutionary rates.
  • The study supports the link between symbiotic origins and ongoing coevolution.