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Related Concept Videos

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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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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Animal Mitochondrial Genetics02:59

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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...
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The Inner Mitochondrial Membrane01:28

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The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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Translocation of Proteins into the Mitochondria01:19

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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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Mitochondrial Protein Sorting01:39

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Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
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Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging
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Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging

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Mitochondrial Dynamics during Development.

Ling He1, Karl Johan Tronstad2, Akhil Maheshwari3

  • 1Department of Pediatrics and Pharmacology, Johns Hopkins University, Baltimore, United States of America.

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Summary
This summary is machine-generated.

Mitochondria are vital eukaryotic organelles crucial for energy production and cellular regulation. Mitochondrial defects are increasingly linked to inherited disorders, highlighting the need for understanding their function and dysfunction.

Keywords:
ArchezoanInner membraneIntermembrane spaceMatrixMitochondrial DNAMitophagyNeonateOntogenyOuter membraneParkin

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Area of Science:

  • Cell Biology
  • Mitochondrial Biology
  • Genetics

Background:

  • Mitochondria are essential eukaryotic organelles involved in energy production, metabolic regulation, and cellular homeostasis.
  • Mitochondrial dysfunction is implicated in various inherited disorders across multiple organ systems.
  • Understanding mitochondrial dynamics and function is critical for addressing cellular health and disease.

Purpose of the Study:

  • To provide a comprehensive review of mitochondrial ontogeny, ultrastructure, biogenesis, and functional dynamics.
  • To explore the clinical manifestations associated with mitochondrial dysfunction.
  • To discuss potential clinical interventions for mitochondrial disorders.

Main Methods:

  • Extensive literature search of PubMed, EMBASE, and Scopus databases.
  • Synthesis of existing research findings on mitochondrial biology and pathology.
  • Inclusion of data from the authors' own clinical and laboratory research.

Main Results:

  • Mitochondria play multifaceted roles in cellular energy generation, regulation, and stress adaptation.
  • Mitochondrial defects are a significant cause of inherited diseases.
  • The review covers diverse aspects from mitochondrial development to clinical implications.

Conclusions:

  • Mitochondrial dysfunction represents a key factor in numerous inherited diseases.
  • Further research into mitochondrial biology is essential for developing effective therapeutic strategies.
  • This review consolidates current knowledge on mitochondria for clinical and research applications.