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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,...
DNA Packaging00:58

DNA Packaging

Overview
Mitochondrial Protein Sorting01:39

Mitochondrial Protein Sorting

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...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...
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,...

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Related Experiment Video

Updated: May 8, 2026

An Improved Method to Isolate Mitochondrial Contact Sites
07:55

An Improved Method to Isolate Mitochondrial Contact Sites

Published on: June 16, 2023

Special packaging enables effective mitochondrial delivery.

Caleb Jerred1, Judith Hatzfeld1, Alessandro Prigione2

  • 1Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University, 40225 Düsseldorf, Germany; Faculty of Mathematics and Natural Sciences, Heinrich Heine University, 40225 Düsseldorf, Germany.

Cell Metabolism
|May 6, 2026
PubMed
Summary
This summary is machine-generated.

Mitochondrial transplantation shows promise for treating mitochondrial diseases. Packaging mitochondria in red blood cell membranes improves delivery and integration, advancing clinical applications.

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Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification
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Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification

Published on: November 16, 2016

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Last Updated: May 8, 2026

An Improved Method to Isolate Mitochondrial Contact Sites
07:55

An Improved Method to Isolate Mitochondrial Contact Sites

Published on: June 16, 2023

Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification
10:21

Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification

Published on: November 16, 2016

Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Mitochondrial Medicine

Background:

  • Mitochondrial diseases are a group of debilitating inherited metabolic disorders.
  • Mitochondrial dysfunction is implicated in various non-hereditary conditions, including neurodegenerative diseases and ischemia-reperfusion injury.
  • Mitochondrial transplantation is an emerging therapeutic strategy to restore mitochondrial function.

Purpose of the Study:

  • To investigate a novel method for enhancing the delivery and integration of transplanted mitochondria.
  • To evaluate the efficacy of packaging mitochondria within erythrocyte-derived membranes for therapeutic purposes.
  • To assess the potential of this improved mitochondrial transplantation technique for clinical applications.

Main Methods:

  • Isolation of functional mitochondria.
  • Encapsulation of mitochondria within erythrocyte-derived plasma membrane vesicles.
  • In vitro and in vivo assessment of mitochondrial delivery efficiency and integration.
  • Evaluation of functional recovery in disease models.

Main Results:

  • Mitochondria packaged within erythrocyte-derived membranes exhibited enhanced stability and delivery efficiency.
  • Successful integration of transplanted mitochondria into recipient cells was observed.
  • Demonstrated improvement in cellular function and reduction in disease pathology in relevant models.
  • The method proved effective in protecting mitochondria during transit and facilitating cellular uptake.

Conclusions:

  • Packaging mitochondria within erythrocyte-derived membranes is a viable strategy to improve mitochondrial transplantation.
  • This approach significantly enhances the delivery, integration, and therapeutic efficacy of transplanted mitochondria.
  • The findings support the advancement of mitochondrial transplantation as a potential clinical therapy for mitochondrial and other related diseases.