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Related Concept Videos

Mitochondrial Membranes01:45

Mitochondrial 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,...
Mitochondrial Membranes01:45

Mitochondrial 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,...
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,...
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...
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...

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Studying Mitochondrial Structure and Function in Drosophila Ovaries
09:53

Studying Mitochondrial Structure and Function in Drosophila Ovaries

Published on: January 4, 2017

Structural diversity of mitochondria: functional implications.

Carmen A Mannella1

  • 1Resource for Visualization of Biological Complexity, Wadsworth Center, Albany, NY 12201-0509, USA. Carmen@wadsworth.org

Annals of the New York Academy of Sciences
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Mitochondrial inner membrane structure is a regulated cellular parameter, not random. Its topology impacts ATP production and protein release during apoptosis and oxidative stress.

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Area of Science:

  • Cell Biology
  • Mitochondrial Biology
  • Biochemistry

Background:

  • Mitochondria exhibit significant structural diversity, especially in the folding of their inner membrane.
  • The inner mitochondrial membrane's structure is crucial for energy transduction and cellular processes.

Purpose of the Study:

  • To propose that mitochondrial inner membrane topology is a regulated cellular parameter.
  • To explore the influence of inner membrane topology on metabolite diffusion, ATP production, and apoptosis.

Main Methods:

  • Review of current research on mitochondrial inner membrane dynamics.
  • Focus on factors controlling inner membrane curvature, fusion, and fission.
  • Analysis of remodeling events during apoptosis and oxidative stress.

Main Results:

  • Mitochondrial inner membrane topology is hypothesized to be a regulated, non-random cellular parameter.
  • Inner membrane structure affects internal diffusion, influencing ATP synthesis and protein release in apoptosis.
  • Progress in understanding factors controlling mitochondrial dynamics and remodeling is summarized.

Conclusions:

  • Mitochondrial inner membrane topology plays a significant role in cellular function.
  • Understanding these dynamics is key to comprehending mitochondrial roles in stress and disease.
  • Further research into the regulation of mitochondrial structure is warranted.