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A multi-functional tubulovesicular network as the ancestral eukaryotic endomembrane system
Juan Carlos González-Sánchez1, Ricardo Costa2, Damien P Devos3
1Centro Andaluz de Biologia del Desarollo (CABD), Universidad Pablo de Olavide, Carretera de Utrera km 1, Seville 41013, Spain. jcgonsan@upo.es.
Biology
|March 27, 2015
Summary
The eukaryotic endomembrane system may have evolved from a tubulovesicular network, enabling early endocytosis. This model suggests mitochondria were involved later in eukaryotic evolution.
Area of Science:
- Cell Biology
- Evolutionary Biology
- Biochemistry
Background:
- The origin of the eukaryotic endomembrane system remains a significant question in evolutionary cell biology.
- Existing hypotheses offer partial explanations for the early development of eukaryotic cellular structures.
Purpose of the Study:
- To propose a unified model for the autogenous evolution of the eukaryotic endomembrane system.
- To integrate recent hypotheses on early endomembrane development and endocytosis.
Main Methods:
- Comparative analysis of membrane organization across different life domains.
- Synthesis of existing hypotheses on endomembrane system evolution.
Main Results:
- The ancestral eukaryotic membranes likely formed a multi-functional tubulovesicular network.
- This organization provided a selective advantage by enabling endocytosis.
- Membrane structures in extant organisms support this tubulovesicular model.
Conclusions:
- A coherent model for autogenous endomembrane system evolution is proposed.
- Mitochondria are suggested to have been incorporated at a later stage of this evolutionary process.
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