Related Concept Videos
02:59Animal 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...
01:45Mitochondrial 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,...
01:45Mitochondrial 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,...
01:37Mitochondria
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,...
01:37Mitochondria
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,...
01:31Translation
Lesson: Translation
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
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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Transmitochondrial Cybrid Generation Using Cancer Cell Lines
Published on: March 17, 2023
Mitochondrial DNA and disease.
Laura C Greaves1, Amy K Reeve, Robert W Taylor
1Mitochondrial Research Group, Institute for Ageing and Health, Newcastle University, UK. laura.greaves@ncl.ac.uk
The Journal of Pathology
|October 13, 2011
Summary
Mitochondrial DNA (mtDNA) defects cause inherited diseases and are linked to aging and cancer. This review details mtDNA genetics, diseases, and its role in neurodegeneration, aging, and cancer.
Area of Science:
- Genetics
- Molecular Biology
- Cellular Respiration
Background:
- Mitochondrial DNA (mtDNA) defects are common causes of inherited diseases.
- These defects impair oxidative phosphorylation (OXPHOS), affecting cellular energy production.
- Similar OXPHOS defects are observed in neurodegenerative diseases, normal aging, and cancer.
Purpose of the Study:
- To review the unique characteristics of mitochondrial genetics.
- To detail pathological features of mtDNA diseases, particularly adult neurological conditions.
- To explore the role of mtDNA mutations in neurodegenerative diseases, aging, and cancer.
Main Methods:
- Literature review of mitochondrial genetics and diseases.
- Analysis of pathological features associated with mtDNA defects.
- Synthesis of current research on mtDNA's role in neurological disorders, aging, and cancer.
Main Results:
- mtDNA encodes crucial subunits of the mitochondrial respiratory chain.
- mtDNA mutations are implicated in inherited diseases, neurodegeneration, aging, and cancer.
- Tumors exhibit mtDNA mutations and altered metabolic phenotypes.
Conclusions:
- Understanding mtDNA genetics is key to comprehending various diseases.
- mtDNA defects represent a significant factor in aging and cancer development.
- Further research into mtDNA mutations can inform therapeutic strategies for related diseases.