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Expression, Purification, and Liposome Binding of Budding Yeast SNX-BAR Heterodimers
Published on: December 6, 2019
Eisosome-driven plasma membrane organization is mediated by BAR domains.
Natasza E Ziółkowska1, Lena Karotki, Michael Rehman
1Max Planck Institute of Biochemistry, Organelle Architecture and Dynamics, Martinsried, Germany.
Nature Structural & Molecular Biology
|June 21, 2011
Summary
Yeast plasma membranes organize into domains using eisosomes, primarily composed of Pil1 and Lsp1 proteins. These proteins feature a banana-shaped BAR domain, revealing a new family of membrane-organizing proteins.
Area of Science:
- Cell biology
- Biochemistry
- Structural biology
Background:
- Plasma membranes are compartmentalized into functional domains.
- Eisosomes are critical protein complexes in yeast plasma membrane organization.
- Eisosomes primarily contain Pil1 and Lsp1 proteins.
Purpose of the Study:
- To investigate the structural and functional characteristics of Pil1 and Lsp1 proteins within yeast eisosomes.
- To identify the protein family to which Pil1 and Lsp1 belong.
- To understand the role of BAR domain proteins in plasma membrane organization.
Main Methods:
- Bioinformatic analysis of Pil1 and Lsp1 protein sequences.
- Structural comparison with known BAR domain-containing proteins.
- Analysis of protein-protein interactions and membrane localization (implied).
Main Results:
- Pil1 and Lsp1 proteins are predominantly composed of a banana-shaped BAR domain.
- This BAR domain shares structural similarities with those found in amphiphysin, arfaptin 2, and endophilin 2.
- The findings identify a novel family of BAR domain proteins involved in plasma membrane organization.
Conclusions:
- Pil1 and Lsp1 are members of a previously unrecognized family of BAR domain proteins.
- These proteins play a significant role in the organization of yeast plasma membrane domains.
- The BAR domain is a key structural feature mediating the function of these proteins in membrane organization.
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