JUN 23, 2016 11:18 AM PDT

Did the Endomembrane System Come From Mitochondria?

WRITTEN BY: Carmen Leitch

One feature of eukaryotes is a complex endomembrane system, comprised of the various membranes that are suspended inside the cytoplasm of a eukaryotic cell. These critical membranes create different and structural and functional compartments, called organelles. In eukaryotes the organelles of the endomembrane system include the endoplasmic reticulum, the nuclear membrane, Golgi apparatus, lysosomes, peroxisomes, autophagosomes, and dynamic vesicle traffic.

Theories that address the evolutionary origin of eukaryotic endomembranes have failed to appreciate the outer membrane vesicles (OMVs) that mitochondria, bacteria, and archaea, secrete into their surroundings.

It is thus proposed that a bacterial ancestor to the mitochondria organelle secreted OMVs within the cytosol of its host. Trapped within the cytosol of a host cell, OMVs then naturally fused either with each other or with the host's plasma membrane. The idea continues that as it lived in symbiosis within its host, it then eventually evolved into the eukaryotic endomembrane system. The video narrates and illustrates this theory that this endomembrane system originated from the mitochondria itself.
About the Author
  • Experienced research scientist and technical expert with authorships on 28 peer-reviewed publications, traveler to over 60 countries, published photographer and internationally-exhibited painter, volunteer trained in disaster-response, CPR and DV counseling.
You May Also Like
MAY 24, 2020
Space & Astronomy
Here's Why SpaceX is Using Heavy Stainless Steel to Make Starship
MAY 24, 2020
Here's Why SpaceX is Using Heavy Stainless Steel to Make Starship
SpaceX is perhaps best known for its reusable Falcon 9 rocket, the same variety that will be lofting astronauts into out ...
MAY 30, 2020
Space & Astronomy
SpaceX Crewed Demo-2 Mission Lifts Astronauts Into Space From U.S. Soil
MAY 30, 2020
SpaceX Crewed Demo-2 Mission Lifts Astronauts Into Space From U.S. Soil
Following a cancelled rocket launch opportunity this past Wednesday due to unfavorable weather conditions, SpaceX and NA ...
JUN 05, 2020
Chemistry & Physics
New Solid-State Battery Bids Farewell to Life-Span Limiting Dendrites
JUN 05, 2020
New Solid-State Battery Bids Farewell to Life-Span Limiting Dendrites
A team of Samsung-sponsored researchers reported in a Nature article an innovative design of solid-state batteries  ...
JUN 14, 2020
Space & Astronomy
NASA Picks Astrobotic to Deliver VIPER Rover to the Moon
JUN 14, 2020
NASA Picks Astrobotic to Deliver VIPER Rover to the Moon
NASA is no stranger to autonomous rovers. To date, the American space agency has sent four rovers to the Martian surface ...
AUG 05, 2020
Space & Astronomy
Mars Was Shaped by Ice Sheets - not Rivers
AUG 05, 2020
Mars Was Shaped by Ice Sheets - not Rivers
Physicists have found that in the distant past, Mars may not have been warm enough to carry vast oceans. Instead, in new ...
AUG 10, 2020
Space & Astronomy
Earth's Magnetic Field Changing Faster than Previously Thought
AUG 10, 2020
Earth's Magnetic Field Changing Faster than Previously Thought
The Earth's magnetic field is crucial for life on Earth. Generated by the molten iron core 3000 km beneath our plane ...
Loading Comments...