Ronen ZAIDEL-BAR
Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel-Aviv University, Israel
Laboratory website
Zaidel-Bar Cell Adhesion Lab
What are stress fibers?
What are stress fibers? Stress fibers are higher order cytoskeletal structures composed of cross-linked actin filament bundles, and in many cases, myosin motor proteins, that span a length of 1-2 micrometers [1]. At least [...]
What is the function of stress fibers?
What is the function of stress fibers? Stress fibers are contractile in nature. By exerting and maintaining tension on the underlying substratum, they form a key element of the mechanotransduction apparatus that links the [...]
What are the first steps in invadopodia assembly and disassembly?
What is the first step in invadopodia assembly? Initiation of invadopdia formation is highly complex, being influenced by various signalling cascades and phosphorylation events that occur following detection of a stimulant. For example, activation [...]
What is Myosin?
What is Myosin? An Introduction to the Myosin Superfamily of Proteins Myosin I has unique tail domain(s) relative to other myosin members which allows myosin I to bind to membrane lipids or to more [...]
How do motor proteins transport cargo along the cytoskeleton?
How do motor proteins transport cargo along the cytoskeleton? Along with providing structural support to the cell, and transmitting force signals, cytoskeletal filaments also provide cells with a network of ‘tracks’ that can be [...]
What are Motor Proteins?
What are Motor Proteins? Motor proteins, such as myosins and kinesins, move along cytoskeletal filaments via a force-dependent mechanism that is driven by the hydrolysis of ATP molecules (reviewed in [1]). Nucleotide hydrolysis and [...]
Ronen Zaidel-Bar
Visiting Faculty
Currently Visting
6-12 Nov 2018
Office: T-Lab, Level 5
Research Areas
Cell-cell and cell-matrix adhesion, Regulation of actomyosin contractility and dynamics, C. elegans development, mechanics and molecular mechanisms of morphogenesis
Research Interests
- How do specific cytoskeletal proteins contribute to the organization and function of cell adhesion and actomyosin structures?
- How are signals processed within the “adhesome” and “contractome” to arrive at the appropriate cytoskeletal arrangement for a given cell state?
- How do adhesion sites and the cytoskeleton sense and respond to external mechanical forces?
Biography
Dr Zaidel-Bar obtained his Ph.D. working with Prof Benny Geiger (Weizmann Institute of Science) on the role of force in regulating cell-matrix adhesions. Their work first focused on single proteins and evolved to encompass the entire adhesome network. In his Postdoctoral training with Prof Jeff Hardin (University of Wisconsin – Madison) Dr Zaidel-Bar switched from studying cells in culture to employing the genetic model organism C. elegans for the study of cell-cell adhesions during development. Dr Zaidel-Bar was attracted to Singapore by the opening of MBI and was awarded the Singapore National Research Foundation Fellowship for promising young investigators.
Education
PhD Weizmann Institute of Science
Recent Publications
- Bertocchi C, Alegría JJ, Vásquez-Sepúlveda S, Ibanez-Prat R, Srinivasan A, Arrano-Valenzuela I, Castro-Pereira B, Soto-Montandon C, Trujillo-Espergel A, Montenegro-Rojas I, Deguchi S, Owen GI, Kanchanawong P, Cerda M, Motta G, Zaidel-Bar R, and Ravasio A. Systematic AI-assisted screening of the cadhesome to map epithelial monolayer mechanics. Cell Commun Signal 2026;. [PMID: 42399739]
- Ray S, Agarwal P, Nitzan A, Nédélec F, and Zaidel-Bar R. Actin capping protein regulates actomyosin contractility to maintain germline architecture in C. elegans. Development 2023;. [PMID: 36897576]
- Avivi Kela S, Sethi K, Tan PY, Suresh D, Ong HT, Castaneda PG, Amin MR, Laviv T, Cram EJ, Faix J, and Zaidel-Bar R. Tension-dependent RHGF-1 recruitment to stress fibers drives robust spermathecal tissue contraction. J Cell Biol 2022; 222(2). [PMID: 36574264]
- Chen Z, Oh D, Biswas KH, Zaidel-Bar R, and Groves JT. Probing the effect of clustering on EphA2 receptor signaling efficiency by subcellular control of ligand-receptor mobility. Elife 2021; 10. [PMID: 34414885]
- Hu S, Grobe H, Guo Z, Wang Y, Doss BL, Pan M, Ladoux B, Bershadsky AD, and Zaidel-Bar R. Reciprocal regulation of actomyosin organization and contractility in non-muscle cells by tropomyosins and alpha-actinins. Mol. Biol. Cell 2019;:mbcE19020082. [PMID: 31216217]
- Desai SK, Padmanabhan A, Harshe S, Zaidel-Bar R, and Kenney LJ. Salmonella biofilms program innate immunity for persistence in Caenorhabditis elegans. Proc. Natl. Acad. Sci. U.S.A. 2019;. [PMID: 31160462]
- Bouffard J, Cecchetelli AD, Clifford C, Sethi K, Zaidel-Bar R, and Cram EJ. The RhoGAP SPV-1 regulates calcium signaling to control the contractility of the C. elegans spermatheca during embryo transits. Mol. Biol. Cell 2019;:mbcE18100633. [PMID: 30726159]
- Priti A, Ong HT, Toyama Y, Padmanabhan A, Dasgupta S, Krajnc M, and Zaidel-Bar R. Syncytial germline architecture is actively maintained by contraction of an internal actomyosin corset. Nat Commun 2018; 9(1):4694. [PMID: 30410005]
- Agarwal P, and Zaidel-Bar R. Principles of Actomyosin Regulation In Vivo. Trends Cell Biol. 2018;. [PMID: 30385150]
- Chen Z, Oh D, Biswas KH, Yu C, Zaidel-Bar R, and Groves JT. Spatially modulated ephrinA1:EphA2 signaling increases local contractility and global focal adhesion dynamics to promote cell motility. Proc. Natl. Acad. Sci. U.S.A. 2018;. [PMID: 29866846]
Lab Members
Zihao Wu
Alumni, Chan Group
MBI PIs win MOE AcRF Tier 3 grant to study endomembrane aging
A research team led by Mechanobiology Institute (MBI) Principal Investigators Assoc. Prof. Tony Kanchanawong and Prof. Rong Li was recently awarded a Ministry of Education Academic Research Fund (MOE AcRF) Tier 3 grant.
Preventing mistakes in chromosomal segregation
A recent study from the Li Lab at the Mechanobiology Institute, National University of Singapore and Johns Hopkins University, USA has revealed new aspects on the involvement of p53 protein in preventing mistakes in chromosomal segregation. Learn more
Jin Zhu
Senior Research Fellow, Facility Manager
Wan Jun Gan
Research Fellow, Chan Group
Meng Yue
Research Assistant, Class of January 2021, Kanchanawong Group
Pan Yuping
Research Assistant, Class of January 2021, Toyama Group
Jashan Preet Singh
PhD Student, Class of January 2021, Young Group
Seah Sock Hong
Research Fellow, Class of January 2021, Low Group
Shen Xingyu
PhD Student, Class of January 2021, Li Group, Young Group
Sun Yuze
PhD Student, Class of January 2021, Yan Jie Group
The rise of spectro-microscopes
A recent study from the Grenci Lab at the Mechanobiology Institute, National University of Singapore has described a new, highly-sensitive IR spectroscopy technique that overcomes the limitations of existing techniques by utilizing optical components that are commonly used in existing visible light imaging techniques. Learn more
