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Related Concept Videos

Animal Mitochondrial Genetics02:59

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...
Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
Translation01:31

Translation

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
Translation01:31

Translation

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
ATP Synthase: Mechanism01:48

ATP Synthase: Mechanism

In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased ATP...
Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...

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An In Vitro Approach to Study Mitochondrial Dysfunction: A Cybrid Model
06:05

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

Published on: March 9, 2022

Mitochondrial genetic diseases.

Marni J Falk1, Neal Sondheimer

  • 1Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. falkm@email.chop.edu

Current Opinion in Pediatrics
|November 4, 2010
PubMed
Summary
This summary is machine-generated.

Mitochondrial diseases, though rare individually, significantly impact health. Recent advances in genetics and diagnostics are improving the identification and treatment of these complex inherited disorders.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Medical Diagnostics

Background:

  • Mitochondrial diseases, stemming from defects in mitochondrial or nuclear DNA, present a diagnostic challenge due to overlapping phenotypes and invasive testing.
  • Collectively, these disorders represent a substantial public health concern, necessitating improved diagnostic and therapeutic strategies.

Purpose of the Study:

  • To review recent advancements in mitochondrial genetics, diagnostic testing, and therapeutic approaches for mitochondrial diseases.
  • To highlight new findings in mitochondrial biology and their implications for patient care and treatment development.

Main Methods:

  • Review of current literature on mitochondrial genetics and disease.
  • Evaluation of recent developments in diagnostic technologies for mitochondrial disorders.
  • Analysis of emerging therapeutic strategies based on mitochondrial biology.

Main Results:

  • Identification of new genetic causes for both nuclear and mitochondrial DNA-based diseases.
  • Progress in developing methods to prevent maternally inherited mitochondrial DNA disorders.
  • Emerging insights from mitochondrial biology research offer potential for targeted therapies.

Conclusions:

  • Ongoing research in mitochondrial biology and disease enhances diagnostic capabilities for pediatric mitochondrial diseases.
  • These advancements provide a foundation for developing effective future therapies for a wide range of mitochondrial disorders.