

Serapion Pyrpassopoulos
The University of Pennsylvania (USA), Department of Physiology
Serapion Pyrpassopoulos received his PhD in Applied Mathematical and Physical Sciences from the National Technical University of Athens (Greece) in 2006. His graduate work focused on experimental thermodynamics of protein folding in the lab of Dr. George Nounesis at the National Center for Scientific Research Demokritos (Greece). In 2007, he joined as a postdoctoral researcher in the laboratory of Dr. E. Michael Ostap at the University of Pennsylvania (USA) where he remains as a Senior Research Investigator. He uses optical tweezers and fluorescence microscopy to study the mechanochemistry of cytoskeletal molecular motors and their interaction with lipid membranes in vitro.

Allison Zajac
The University of Chicago, Department of Molecular Genetics and Cell Biology
Allison Zajac received her PhD in Cell and Molecular Biology from the University of Pennsylvania (USA) in 2013, where she worked in the laboratories of Mike Ostap and Erika Holzbaur and studied how microtubular motors and the actin cytoskeleton move and shape organelles inside mammalian cells. She is currently a postdoctoral researcher in the laboratory of Sally Horne-Badovinac at the University of Chicago (USA). She works with Drosophila using a combination of genetics and live imaging to understand how molecular motors contribute to the polarized secretion needed for the development of epithelial tissues in vivo.
Lipid membranes provide physical and biochemical boundaries that compartmentalize intracellular functions and create the modular structure of the cell. The different membranous compartments within eukaryotic cells, such as the Golgi apparatus, the endoplasmic reticulum and the nucleus, although separate, are in communication with each other. These compartments are shaped, remodeled, and connected by their continual interaction with the mechanically active and force generating components of the cell, cytoskeletal filaments and cytoskeletal motors. The interplay among lipid membranes, the cytoskeleton, and motors establishes a crosstalk between mechanical forces and biochemical signaling to control many aspects of the cell including its morphology, its internal architecture, vesicular cargo trafficking, and gene expression. The need for a more mechanistic understanding of how lipid membranes, cytoskeletal filaments and motors coordinate to generate and transduce mechanical forces has led to the development of in vitro reconstitution assays of independently functioning modules involving the minimal components. Technological advances in biophysical research over the last two decades have allowed researchers to build up assays of increased complexity which has allowed validation of models based on in vivo observations, identification of new emergent properties, and new predictions for more targeted in vivo research. The goal of this collection is to present detailed protocols for the study of the interaction between lipid and cytoskeletal components that can further inspire biophysicists and cell biologists to expand upon them and continue to develop the field.
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Cited by 41
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2017
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1Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS UMR168, 2Department of Genetics and Complex Diseases, T. H. Chan School of Public Health, Harvard Medical School, 3Department of Cell Biology, Harvard Medical School, 4Sorbonne Universités, UPMC University Paris 06, 5Center for Studies in Physics and Biology, The Rockefeller University
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Cited by 20
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2021
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1Department of Mechanical Engineering, University of Michigan, Ann Arbor, 2John A. Paulson School of Engineering and Applied Sciences, Harvard University, 3Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, 4Department of Biomedical Engineering, University of Michigan, Ann Arbor, 5Department of Biophysics, University of Michigan, Ann Arbor, 6Cellular and Molecular Biology Program, University of Michigan, Ann Arbor