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Related Concept Videos

The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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,...
Porin Insertion in the Outer Mitochondrial Membrane01:12

Porin Insertion in the Outer Mitochondrial Membrane

Porins are beta-barrel proteins translocated to the mitochondrial outer membrane through the TOM complex into the intermembrane space. Porin precursors bind TIM chaperones within the intermembrane space and are guided to the Sorting and Assembly Machinery complex or SAM complex on the outer mitochondrial membrane.
Three models describe the assembly of porins by the SAM complex and their insertion into the outer membrane. Model 1 suggests that porins are assembled outside the SAM channel as the...
Mitochondria01:37

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,...
Mitochondria01:37

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,...
Energy to Drive Translocation01:37

Energy to Drive Translocation

Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...

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Related Experiment Video

Updated: Jul 2, 2026

Time-Lapse Video Microscopy for Assessment of EYFP-Parkin Aggregation as a Marker for Cellular Mitophagy
09:29

Time-Lapse Video Microscopy for Assessment of EYFP-Parkin Aggregation as a Marker for Cellular Mitophagy

Published on: May 4, 2016

[Parkin and mitochondria].

Takao Mitsui1, Yukiko Kuroda, Ryuji Kaji

  • 1Department of Clinical Research, National Hospital Organization, Tokushima National Hospital, Yoshinogawa, Tokushima 776-8585, Japan.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|August 23, 2008
PubMed
Summary

Parkinson disease (PD) pathogenesis involves mitochondrial dysfunction and oxidative stress. Parkin, a key protein, shows significant promise in improving mitochondrial function in familial PD.

Area of Science:

  • Neuroscience
  • Genetics
  • Cell Biology

Background:

  • Parkinson disease (PD) is a common neurodegenerative disorder, with sporadic PD etiology largely unknown.
  • Mitochondrial dysfunction and oxidative stress are implicated in PD pathogenesis.
  • Genes linked to familial PD offer insights into molecular mechanisms.

Purpose of the Study:

  • To review recent findings on mitochondrial dysfunction and oxidative stress in PD.
  • To focus on the role of mitochondria and Parkin in PD pathogenesis.
  • To explore the relationship between Parkin, PINK1, and DJ-1.

Main Methods:

  • Literature review of recent findings on PD genetics and molecular mechanisms.
  • Analysis of studies focusing on mitochondrial pathways and protein accumulation in PD.

More Related Videos

Fluorescence-Based Quantification of Mitochondrial Membrane Potential and Superoxide Levels Using Live Imaging in HeLa Cells
06:57

Fluorescence-Based Quantification of Mitochondrial Membrane Potential and Superoxide Levels Using Live Imaging in HeLa Cells

Published on: May 12, 2023

Related Experiment Videos

Last Updated: Jul 2, 2026

Time-Lapse Video Microscopy for Assessment of EYFP-Parkin Aggregation as a Marker for Cellular Mitophagy
09:29

Time-Lapse Video Microscopy for Assessment of EYFP-Parkin Aggregation as a Marker for Cellular Mitophagy

Published on: May 4, 2016

Fluorescence-Based Quantification of Mitochondrial Membrane Potential and Superoxide Levels Using Live Imaging in HeLa Cells
06:57

Fluorescence-Based Quantification of Mitochondrial Membrane Potential and Superoxide Levels Using Live Imaging in HeLa Cells

Published on: May 12, 2023

  • Examination of the function of Parkin, PINK1, and DJ-1 in cellular models.

    • Main Results:

    • Mitochondrial dysfunction and oxidative damage are key in familial PD, affecting dopaminergic neurons.
    • Mutations in Parkin, PINK1, and DJ-1 highlight the importance of mitochondrial health.
    • Parkin is identified as a crucial factor in mitigating mitochondrial dysfunction.

    Conclusions:

    • Mitochondrial dysfunction and oxidative stress are central to PD pathogenesis.
    • Parkin plays a vital role in protecting mitochondria and may be a therapeutic target.
    • Further research into these proteins can elucidate PD mechanisms.