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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...

Mitochondria

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

Mitochondria

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

Mitochondrial Membranes

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...

Mitochondrial Membranes

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...

Export of Mitochondrial and Chloroplast Genes

Export of Mitochondrial and Chloroplast Genes

A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred irrespective...

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Updated: May 11, 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

Mitochondrial genetics.

Patrick Francis Chinnery¹, Gavin Hudson

¹International Centre for Life, Newcastle University, Central Parkway, Newcastle upon Tyne, UK.

British Medical Bulletin

|May 25, 2013

Summary

This summary is machine-generated.

Mitochondrial DNA (mtDNA) variation impacts numerous human diseases beyond rare metabolic disorders. Emerging genetic manipulation techniques offer hope for preventing severe inherited mitochondrial conditions.

Keywords:

genetics mitochondria mitochondrial DNA mitochondrial disease mtDNA

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Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing

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An In Vitro Approach to Study Mitochondrial Dysfunction: A Cybrid Model

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Published on: March 9, 2022

Area of Science:

Mitochondrial Genetics
Human Disease Genetics

Background:

The field of mitochondrial genetics has expanded significantly over the past decade.
Focus has shifted from rare metabolic diseases to the role of mitochondrial DNA (mtDNA) variation in a broader range of human illnesses.

Purpose of the Study:

To review key concepts in mitochondrial biology.
To introduce classic and emerging mitochondrial disorders.

Main Methods:

Literature review of current mitochondrial genetics research via PubMed.
Utilized public databases: MITOMAP, Human DNA polymerase Gamma Mutation Database, and PhyloTree.org.

Main Results:

Defects in mtDNA or nuclear-encoded mitochondrial maintenance genes disrupt cellular energy, leading to various human diseases.
Mechanisms of mtDNA inheritance remain a subject of active debate.

Conclusions:

In vitro genetic manipulation, though nascent, shows potential for eradicating the inheritance of severe mtDNA diseases.