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Updated: May 27, 2026
17:14
In vivo and in vitro Studies of Adaptor-clathrin Interaction
Published on: January 26, 2011
A single β adaptin contributes to AP1 and AP2 complexes and clathrin function in Dictyostelium
R Thomas Sosa1, Michelle M Weber, Yujia Wen
1Section of Molecular Cell and Developmental Biology, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA.
Traffic (Copenhagen, Denmark)
|November 5, 2011
Summary
A single beta subunit (β1/2) is crucial for adaptor protein (AP) complex stability and function in Dictyostelium, impacting cell growth, division, and osmoregulation.
Area of Science:
- Cell Biology
- Molecular Biology
- Developmental Biology
Background:
- Clathrin-coated vesicles are vital for cellular processes like nutrient uptake.
- Adaptor proteins (APs) are key to clathrin assembly, with beta subunits being essential components.
Purpose of the Study:
- To investigate the role of a single beta subunit (β1/2) in Dictyostelium adaptor protein complexes (AP1 and AP2).
- To understand the contribution of β1/2 to cellular processes and protein stability.
Main Methods:
- Gene disruption of the β1/2 subunit in Dictyostelium.
- Phenotypic analysis of β1/2 null cells, including growth, cytokinesis, development, and osmoregulation.
- Assessment of AP1 and AP2 complex subunit stability.
Main Results:
- Disruption of β1/2 caused severe defects in growth, cytokinesis, development, and osmoregulation.
- β1/2 null cells lacked contractile vacuoles and showed mislocalized markers.
- Absence of β1/2 reduced protein levels of AP1 and AP2 medium subunits, indicating a role in their stability.
Conclusions:
- A single β1/2 subunit is essential for the stability and function of both AP1 and AP2 complexes in Dictyostelium.
- The findings suggest β1/2 may represent a common ancestor to vertebrate β1 and β2 subunits.
- AP1 plays a particularly important role in clathrin-mediated pathways in Dictyostelium.
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