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Animal Mitochondrial Genetics

Animal Mitochondrial Genetics

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...

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life

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Related Experiment Video

Updated: May 30, 2026

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing

Published on: February 10, 2023

Transcriptome analysis in mitochondrial disorders.

Matthias Elstner¹, Douglass M Turnbull

¹Department of Neurology with Friedrich-Baur-Institute, Ludwig-Maximilians-University, Munich, Germany. melstner@med.uni-muenchen.de

Brain Research Bulletin

|August 23, 2011

Summary

This summary is machine-generated.

Mitochondrial dysfunction impacts genetic disorders and cellular processes. Gene expression studies reveal signaling networks for adaptation and highlight effects on nuclear transcription, offering therapeutic insights.

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Last Updated: May 30, 2026

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing

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Isolation of Mitochondria for Mitochondrial Supercomplex Analysis from Small Tissue and Cell Culture Samples

Isolation of Mitochondria for Mitochondrial Supercomplex Analysis from Small Tissue and Cell Culture Samples

Published on: May 3, 2024

Area of Science:

Genetics
Molecular Biology
Cell Biology

Background:

Primary mitochondrial dysfunction encompasses a wide range of genetic disorders.
Mitochondrial function depends on nuclear and mitochondrial genomes, influencing energy metabolism and stress adaptation.
Whole transcriptome studies provide a global view of mitochondrial physiology and dysfunction.

Purpose of the Study:

To review gene expression studies in models of mitochondrial dysfunction.
To explore the impact of mitochondrial dysfunction on cellular signaling and nuclear transcription.
To discuss the therapeutic potential of identified signaling networks.

Main Methods:

Analysis of microarray data from human and animal tissues.
Examination of cell culture models with induced mitochondrial dysfunction.
Summarization and discussion of gene expression study results.

Main Results:

Microarray data show activation of signaling networks promoting adaptation via autophagy and mitochondrial biogenesis.
Mitochondrial dysfunction significantly impacts global nuclear transcription.
Alterations in genomic stability, cell cycle, and epigenetic regulation are implicated.

Conclusions:

Gene expression studies offer deep insights into mitochondrial physiology and dysfunction.
Signaling pathways involved in bioenergetic adaptation present therapeutic targets.
Mitochondrial dysfunction has far-reaching effects on nuclear gene expression and cellular processes.