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Related Concept Videos

Transport Across the Golgi01:26

Transport Across the Golgi

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While it is unclear how molecules move between adjacent Golgi cisternae, it is apparent that the molecules move from cis- cisterna, the entry face, to the trans- cisterna, the exit face. Experiments initially suggested vesicles that bud from one cisterna and fuse with the next cisterna to transport proteins between the cisternae. This vesicular transport model describes the Golgi apparatus as a relatively static structure with a unique enzyme composition in each cisterna. Molecules are...
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Protein Transport to the Inner Chloroplast Membrane01:18

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Proteins targeted to the inner chloroplast membrane, or plastid proteins, are transported by two general pathways: the stop-transfer and the re-insertion or post-import pathways. Most plastid proteins carry N-terminal transit sequences and internal import sequences targeting it to the specific chloroplast subcompartment. Proteins targeted by the stop-transfer pathway have internal hydrophobic sequences that inhibit their translocation into the stroma. As a result, these precursors are arrested...
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Chloroplast outer membrane proteins encoded by the nucleus are synthesized in the cytosol. Soon after synthesis, they bind cytosolic factors such as 14-3-3 protein and the Hsp70 chaperones that keep these precursors in an unfolded state until their translocation.
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Protein Transport to the Stroma01:24

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Chloroplasts are triple membrane structures with an outer membrane, an inner membrane, and a thylakoid membrane, each containing distinct metabolite transporters, membrane translocons, and enzymes. Appropriate sorting and translocating these proteins to their correct membrane systems is essential for chloroplast function.
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Golgi Apparatus01:09

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Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
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Golgi Apparatus01:49

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As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.
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Related Experiment Video

Updated: Jan 11, 2026

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells
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Post-Golgi Trafficking in Plant Cells.

Elizabeth Berryman1, Ariadna González Solís1, Ethan Weiner1

  • 1Department of Botany and Center for Quantitative Cell Imaging, University of Wisconsin-Madison, Madison, WI, USA.

Sub-Cellular Biochemistry
|November 15, 2025
PubMed
Summary
This summary is machine-generated.

Plant endosomes are crucial hubs for post-Golgi trafficking, managing protein sorting and membrane remodeling. This review details their roles in endosomal sorting complexes and transport pathways.

Keywords:
AnterogradeESCRTEndocytosisEndosomesExocytosisRetrogradeRetromertrans-Golgi Network

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Area of Science:

  • Plant cell biology
  • Molecular and Cellular Biology

Background:

  • Post-Golgi trafficking is essential for plant cell function, regulating protein and lipid distribution.
  • Endosomes act as central sorting stations in the endomembrane system, influencing plasma membrane and vacuolar composition.
  • Internalized proteins navigate from the plasma membrane to the trans-Golgi Network (TGN) and then to multivesicular endosomes (MVEs).

Purpose of the Study:

  • To review the critical roles of endosomes in plant post-Golgi trafficking.
  • To elucidate the mechanisms of cargo sorting and membrane remodeling at endosomes.
  • To highlight the molecular machinery involved in endosomal transport.

Main Methods:

  • This review synthesizes existing literature on plant endosomal trafficking.
  • It focuses on molecular assemblies like retromer, ESCRT, GTPases, adaptors, and SNAREs.
  • Analysis of protein sorting and membrane dynamics within the endomembrane system.

Main Results:

  • Endosomes, particularly the TGN and MVEs, are key sites for protein sorting and redirection.
  • Molecular complexes facilitate cargo selection and membrane trafficking pathways.
  • These processes are vital for adapting cell surface and vacuolar contents to internal and external cues.

Conclusions:

  • Endosomes are indispensable for regulating protein localization and cellular homeostasis in plants.
  • Understanding endosomal sorting and membrane remodeling mechanisms is crucial for plant development and response.
  • Further research into these molecular assemblies will advance plant cell biology.