Advances in imaging, genetics, and sequencing have made it possible to identify, track, and manipulate molecules involved in many different cellular processes in living cells. But are our models of these processes complete and correct at the molecular level? And can we understand mechanistically why these processes fail and what might be required to repair them? This is especially a challenge for processes that involve membrane proteins, such as those that mediate interactions with extracellular signals. Even though membrane proteins comprise ~30% of human genes and are important targets for drugs, the techniques available for characterizing and manipulating them are severely limited. What is needed to answer basic and applied questions about membrane protein function is a technology for re-building cell-like systems from the bottom up that recapitulates the spatial organization, confinement, and dynamic properties of living cells. This project will develop a new instrument capable of creating membrane encapsulations with oriented membrane proteins, offering a new experimental platform for answering questions about how information is transmitted across membranes. By encapsulating complex mixtures of proteins, DNA, and other biomolecules inside bilayer membrane vesicles with high throughput and high yield, the proposed instrument will address a fundamental obstacle in our understanding of how membrane proteins, beginning with EGFR and GPCRs, organize and respond to stimuli.

Public Health Relevance

This project will develop a new instrument capable of creating cell-like vesicles necessary for answering a broad range of fundamental biological questions. By encapsulating complex mixtures of proteins, DNA, and other biomolecules inside bilayer membrane vesicles with high throughput and high yield, the proposed instrument will make it possible to functionally reconstitute membrane protein activity for discovery and screening applications.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM114344-02
Application #
9108992
Study Section
Instrumentation and Systems Development Study Section (ISD)
Program Officer
Chin, Jean
Project Start
2015-08-01
Project End
2019-06-30
Budget Start
2016-07-01
Budget End
2017-06-30
Support Year
2
Fiscal Year
2016
Total Cost
Indirect Cost
Name
University of California Berkeley
Department
Biomedical Engineering
Type
Biomed Engr/Col Engr/Engr Sta
DUNS #
124726725
City
Berkeley
State
CA
Country
United States
Zip Code
94704
Schmid, Eva M; Bakalar, Matthew H; Choudhuri, Kaushik et al. (2016) Size-dependent protein segregation at membrane interfaces. Nat Phys 12:704-711
Diz-Muñoz, Alba; Thurley, Kevin; Chintamen, Sana et al. (2016) Membrane Tension Acts Through PLD2 and mTORC2 to Limit Actin Network Assembly During Neutrophil Migration. PLoS Biol 14:e1002474
Schmid, Eva M; Richmond, David L; Fletcher, Daniel A (2015) Reconstitution of proteins on electroformed giant unilamellar vesicles. Methods Cell Biol 128:319-38