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Related Concept Videos

Mitochondria01:37

Mitochondria

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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,...
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Mitochondrial Membranes01:45

Mitochondrial Membranes

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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,...
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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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ATP Synthase: Mechanism01:48

ATP Synthase: Mechanism

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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...
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Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

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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...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
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Pathogenic mitochondrial dysfunction and metabolic abnormalities.

Walter H Moos1, Douglas V Faller2, Ioannis P Glavas3

  • 1Department of Pharmaceutical Chemistry, School of Pharmacy, University of California San Francisco, San Francisco, CA, USA.

Biochemical Pharmacology
|October 21, 2021
PubMed
Summary

Mitochondria, crucial for energy production, are implicated in metabolic diseases and pathogenesis. Understanding their role is key to developing new therapies for conditions like diabetes and neurodegenerative disorders.

Keywords:
Biochemical pathwaysDiseasesDisordersDysfunctionHomeostasisMetabolic abnormalitiesMitochondrial diseasesPathogenesisPathogenesis and pathogenic driversPhysiological networksReprogrammingTherapeutics

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Area of Science:

  • Biochemistry
  • Pathogenesis
  • Metabolic Diseases

Background:

  • Microorganisms like bacteria and viruses are known pathogenic drivers.
  • Subcellular compartments, particularly mitochondria, are often overlooked as pathogenic factors and metabolic disease intermediaries.
  • Mitochondria are essential for cellular energy production (ATP) and their dysfunction is central to many genetic and metabolic disorders.

Purpose of the Study:

  • To explore the links between biochemical pathways, pathogenesis, and metabolic diseases.
  • To highlight the critical role of mitochondria in disease etiology and progression.
  • To set the stage for novel therapeutic strategies targeting mitochondrial dysfunction.

Main Methods:

  • Review and synthesis of existing literature on biochemical pathways.
  • Analysis of the role of mitochondria in pathogenesis.
  • Connecting mitochondrial function to metabolic disorders.

Main Results:

  • Mitochondria are not only essential for energy metabolism but can also be pathogenic independently.
  • Mitochondrial dysfunction is a hallmark of genetic mitochondrial diseases and a common factor in broader metabolic disorders.
  • Interconnectedness of genetic, metabolic, and mitochondrial factors observed in diseases such as diabetes, heart failure, neurodegenerative conditions, and viral infections.

Conclusions:

  • Mitochondria play a multifaceted role in health and disease, extending beyond energy production.
  • Therapeutic advances in metabolic diseases can be achieved by focusing on mitochondrial health and function.
  • The convergence of genetic, metabolic, and mitochondrial axes presents a unified view of complex diseases.