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Recycling Endosomes and Transcytosis

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Related Experiment Video

Updated: Nov 13, 2025

The Microscopy-Based Assay to Study and Analyze the Recycling Endosomes using SNARE Trafficking

The Microscopy-Based Assay to Study and Analyze the Recycling Endosomes using SNARE Trafficking

Published on: February 12, 2022

A dimmer switch for endosome-to-cell surface recycling.

Matthew N J Seaman¹

¹Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK.

The Journal of Cell Biology

|March 12, 2021

Summary

This summary is machine-generated.

Phosphorylation of sorting nexin 27 (Snx27) regulates its function in endosome-to-cell surface recycling. This process is crucial for how cells respond to external stimuli by controlling protein sorting.

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Area of Science:

Cell biology
Molecular and cell biology
Biochemistry

Background:

Endosome-to-cell surface recycling is a vital cellular process for protein homeostasis and signaling.
The retromer complex and sorting nexin 27 (Snx27) are known key mediators of this recycling pathway.
Understanding the regulation of this pathway is crucial for deciphering cellular responses to stimuli.

Purpose of the Study:

To elucidate the regulatory mechanisms governing endosome-to-cell surface recycling.
To investigate the role of Snx27 phosphorylation in response to external stimuli.
To understand how external stimuli impact endosomal protein sorting.

Main Methods:

The study by Mao et al. investigated the molecular mechanisms of endosomal protein sorting.
Utilized biochemical and cell biological approaches to analyze Snx27 function.
Examined the impact of phosphorylation on Snx27's cargo-binding activity.

Main Results:

Phosphorylation of Snx27 was identified as a key regulatory event.
This phosphorylation directly impacts Snx27's cargo-binding function.
Reduced Snx27 cargo binding leads to diminished endosome-to-cell surface recycling.

Conclusions:

External stimuli can modulate endosomal protein sorting through Snx27 phosphorylation.
Snx27 phosphorylation acts as a switch, reducing its cargo-binding affinity.
This mechanism provides a novel layer of control over endosome-to-cell surface recycling in response to cellular signals.