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Related Concept Videos

Bacterial Toxins01:12

Bacterial Toxins

Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
The Electron Transport Chain01:30

The Electron Transport Chain

The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
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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.
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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,...
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,...
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Receptor-mediated Endocytosis

Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
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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...

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Unveiling Xenobiotic Transport and Effects in Isolated Mitochondria: Insights from Respirometric and Enzymatic Assays
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Hijacking mitochondria: bacterial toxins that modulate mitochondrial function.

Jhih-Hang Jiang1, Janette Tong, Kipros Gabriel

  • 1Department of Biochemistry & Molecular Biology, Monash University, Clayton, Australia.

IUBMB Life
|April 13, 2012
PubMed
Summary
This summary is machine-generated.

Bacterial toxins target host mitochondria, crucial for energy and cell death. This review summarizes known mitochondrial toxins and their mechanisms during infection.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Biochemistry

Background:

  • Bacterial infections significantly impact global health and agriculture.
  • Bacterial pathogens utilize toxins and effectors to disrupt host physiological processes.
  • Mitochondria are vital organelles involved in energy production and cell death.

Purpose of the Study:

  • To summarize bacterial toxins that target host mitochondria.
  • To review the mechanisms by which these toxins target mitochondria.
  • To describe the actions of these toxins within mitochondria.

Main Methods:

  • Literature review of studies on bacterial toxins targeting mitochondria.
  • Analysis of documented targeting mechanisms.
  • Summary of functional effects on mitochondrial processes.

Main Results:

  • Identified various bacterial toxins specifically directed at mitochondria.
  • Detailed mechanisms for mitochondrial targeting are elucidated for several toxins.
  • Observed diverse impacts on mitochondrial functions like ATP production and apoptosis.

Conclusions:

  • Mitochondria are key targets for bacterial virulence factors.
  • Understanding toxin-mitochondria interactions is crucial for combating bacterial infections.
  • Further research into these mechanisms can reveal novel therapeutic strategies.