Journal ArticleDOI
Localized Rac Activation Dynamics Visualized in Living Cells
Vadim Kraynov,Chester E. Chamberlain,Gary M. Bokoch,Martin A. Schwartz,Sarah Slabaugh,Klaus M. Hahn +5 more
TLDR
A method called FLAIR (fluorescence activation indicator for Rho proteins) was developed to quantify the spatio-temporal dynamics of the Rac1 nucleotide state in living cells, revealing precise spatial control of growth factor-induced Rac activation, in membrane ruffles and in a gradient of activation at the leading edge of motile cells.Abstract:
Signaling proteins are thought to be tightly regulated spatially and temporally in order to generate specific and localized effects. For Rac and other small guanosine triphosphatases, binding to guanosine triphosphate leads to interaction with downstream targets and regulates subcellular localization. A method called FLAIR (fluorescence activation indicator for Rho proteins) was developed to quantify the spatio-temporal dynamics of the Rac1 nucleotide state in living cells. FLAIR revealed precise spatial control of growth factor-induced Rac activation, in membrane ruffles and in a gradient of activation at the leading edge of motile cells. FLAIR exemplifies a generally applicable approach for examining spatio-temporal control of protein activity.read more
Citations
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Journal ArticleDOI
Rho GTPases in cell biology.
TL;DR: Rho GTPases are molecular switches that control a wide variety of signal transduction pathways in all eukaryotic cells and their ability to influence cell polarity, microtubule dynamics, membrane transport pathways and transcription factor activity is probably just as significant.
Journal ArticleDOI
Rho GTPases: Biochemistry and Biology
Aron B. Jaffe,Alan Hall +1 more
TL;DR: This review presents the best characterized of these biochemical pathways that control some of the most fundamental processes of cell biology common to all eukaryotes, including morphogenesis, polarity, movement, and cell division.
Journal ArticleDOI
A landscape of driver mutations in melanoma
Eran Hodis,Ian R. Watson,Ian R. Watson,Gregory V. Kryukov,Gregory V. Kryukov,Gregory V. Kryukov,Stefan T. Arold,Marcin Imielinski,Jean Philippe Theurillat,Elizabeth Nickerson,Daniel Auclair,Liren Li,Liren Li,Chelsea S. Place,Daniel DiCara,Alex H. Ramos,Alex H. Ramos,Michael S. Lawrence,Kristian Cibulskis,Andrey Sivachenko,Douglas Voet,Gordon Saksena,Nicolas Stransky,Robert C. Onofrio,Wendy Winckler,Kristin G. Ardlie,Nikhil Wagle,Nikhil Wagle,Jennifer A. Wargo,Kelly Chong,Donald L. Morton,Katherine Stemke-Hale,Guo Chen,Michael S. Noble,Matthew Meyerson,John E. Ladbury,Michael A. Davies,Jeffrey E. Gershenwald,Stephan N. Wagner,Dave S.B. Hoon,Dirk Schadendorf,Eric S. Lander,Eric S. Lander,Stacey Gabriel,Gad Getz,Levi A. Garraway,Lynda Chin +46 more
TL;DR: The spectrum of driver mutations provided unequivocal genomic evidence for a direct mutagenic role of UV light in melanoma pathogenesis, providing oncogenic insights in BRAF- and NRAS-driven melanoma as well as those without known NRAS/BRAF mutations.
Journal ArticleDOI
Rho and Rac Take Center Stage
TL;DR: This work will describe how the activity of Rho proteins is regulated downstream from growth factor receptors and cell adhesion molecules by guanine nucleotide exchange factors and GTPase activating proteins.
Journal ArticleDOI
Cell migration: Rho GTPases lead the way.
Myrto Raftopoulou,Alan Hall +1 more
TL;DR: Rho GTPases control signal transduction pathways that link cell surface receptors to a variety of intracellular responses, and their role in cell migration is reviewed.
References
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Journal ArticleDOI
Rho GTPases and the Actin Cytoskeleton
TL;DR: Members of the Rho family of small guanosine triphosphatases have emerged as key regulators of the actin cytoskeleton, and through their interaction with multiple target proteins, they ensure coordinated control of other cellular activities such as gene transcription and adhesion.
Journal ArticleDOI
The green fluorescent protein
TL;DR: In just three years, the green fluorescent protein from the jellyfish Aequorea victoria has vaulted from obscurity to become one of the most widely studied and exploited proteins in biochemistry and cell biology.
Journal ArticleDOI
The small GTP-binding protein rac regulates growth factor-induced membrane ruffling.
TL;DR: It is proposed that rac and rho are essential components of signal transduction pathways linking growth factors to the organization of polymerized actin and that growth factors act through rac to stimulate this rho-dependent response.
Journal ArticleDOI
A brain serine/threonine protein kinase activated by Cdc42 and Rac1.
TL;DR: A new brain serine/threonine protein kinase may be a target for the p21 ras -related proteins Cdc42 and Rac1, and provides a model for studying p21 regulation of mammalian phosphorylation signalling pathways.
Journal ArticleDOI
Rho GTPases Control Polarity, Protrusion, and Adhesion during Cell Movement
Catherine D. Nobes,Alan Hall +1 more
TL;DR: It is concluded that the signal transduction pathways controlled by the four small GTPases, Rho, Rac, Cdc42, and Ras, cooperate to promote cell movement.
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Rho, Rac, and Cdc42 GTPases regulate the assembly of multimolecular focal complexes associated with actin stress fibers, lamellipodia, and filopodia
Catherine D. Nobes,Alan Hall +1 more