نتایج جستجو برای: cdc42

تعداد نتایج: 3729  

Journal: :Structure 2016
Louis LeCour Vamsi K Boyapati Jing Liu Zhigang Li David B Sacks David K Worthylake

In signaling, Rho-family GTPases bind effector proteins and alter their behavior. Here we present the crystal structure of Cdc42·GTP bound to the GTPase-activating protein (GAP)-related domain (GRD) of IQGAP2. Four molecules of Cdc42 are bound to two GRD molecules, which bind each other in a parallel dimer. Two Cdc42s bind very similarly to the Ras/RasGAP interaction, while the other two bind p...

Journal: :Journal of immunology 2006
Irina Tskvitaria-Fuller Abhinav Seth Neeta Mistry Hua Gu Michael K Rosen Christoph Wülfing

T cell polarization toward and within the cellular interface with an APC is critical for effective T cell activation. The Rho family GTPase Cdc42 is a central regulator of cellular polarization. Using live-cell imaging, we characterized the spatiotemporal patterns of Cdc42 activity and their physiological regulation. Using three independent means of experimental manipulation of Cdc42 activity, ...

Journal: :Nature chemical biology 2006
Henry E Pelish Jeffrey R Peterson Susana B Salvarezza Enrique Rodriguez-Boulan Ji-Long Chen Mark Stamnes Eric Macia Yan Feng Matthew D Shair Tomas Kirchhausen

Inspired by the usefulness of small molecules to study membrane traffic, we used high-throughput synthesis and phenotypic screening to discover secramine, a molecule that inhibits membrane traffic out of the Golgi apparatus by an unknown mechanism. We report here that secramine inhibits activation of the Rho GTPase Cdc42, a protein involved in membrane traffic, by a mechanism dependent upon the...

2016
Delyan R. Mutavchiev Marcin Leda Kenneth E. Sawin

The Rho family GTPase Cdc42 is a key regulator of eukaryotic cellular organization and cell polarity [1]. In the fission yeast Schizosaccharomyces pombe, active Cdc42 and associated effectors and regulators (the "Cdc42 polarity module") coordinate polarized growth at cell tips by controlling the actin cytoskeleton and exocytosis [2-4]. Localization of the Cdc42 polarity module to cell tips is t...

Journal: :Current Biology 2001
Maiko Higuchi Norihisa Masuyama Yasuhisa Fukui Akira Suzuki Yukiko Gotoh

Growth factors promote cell survival and cell motility, presumably through the activation of Akt and the Rac and Cdc42 GTPases, respectively. Because Akt is dispensable for Rac/Cdc42 regulation of actin reorganization, it has been assumed that Rac and Cdc42 stimulate cell motility independent of Akt in mammalian cells. However, in this study we demonstrate that Akt is essential for Rac/Cdc42-re...

Journal: :Mechanisms of Development 2012
Ryo Aizawa Atsushi Yamada Dai Suzuki Tadahiro Iimura Hidetoshi Kassai Takeshi Harada Masayuki Tsukasaki Gou Yamamoto Tetsuhiko Tachikawa Kazuki Nakao Matsuo Yamamoto Akira Yamaguchi Atsu Aiba Ryutaro Kamijo

Cdc42, a member of the Rho subfamily of small GTPases, is known to be a regulator of multiple cellular functions, including cytoskeletal organization, cell migration, proliferation, and apoptosis. However, its tissue-specific roles, especially in mammalian limb development, remain unclear. To investigate the physiological function of Cdc42 during limb development, we generated limb bud mesenchy...

Journal: :Molecular biology of the cell 2007
Helen Court Peter Sudbery

The human fungal pathogen Candida albicans can switch between yeast, pseudohyphal, and hyphal morphologies. To investigate whether the distinctive characteristics of hyphae are due to increased activity of the Cdc42 GTPase, strains lacking negative regulators of Cdc42 were constructed. Unexpectedly, the deletion of the Cdc42 Rho guanine dissociation inhibitor RDI1 resulted in reduced rather tha...

Journal: :Journal of cell science 2014
Kyriakos Kokkoris Daniela Gallo Castro Sophie G Martin

Cell polarization relies on small GTPases, such as Cdc42, which can break symmetry through self-organizing principles, and landmarks that define the axis of polarity. In fission yeast, microtubules deliver the Tea1-Tea4 complex to mark cell poles for growth, but how this complex activates Cdc42 is unknown. Here, we show that ectopic targeting of Tea4 to cell sides promotes the local activation ...

Journal: :The Journal of biological chemistry 1998
N Lamarche-Vane A Hall

Cdc42 mediates several signaling pathways leading to actin reorganization, transcriptional activation, and cell cycle control. Mutational analysis of Cdc42 has revealed that actin reorganization and transcriptional activation are induced through independent signaling pathways. The Y40C effector mutant of Cdc42 no longer interacts with many of its known target proteins, such as p65(PAK) and WASP...

Journal: :Cancer research 2006
Dianne S Hirsch Yi Shen Wen Jin Wu

Overexpression of epidermal growth factor receptor (EGFR) contributes to increased cell proliferation and migration in breast cancer. However, mechanisms of EGFR overexpression remain elusive and often cannot be attributed to gene amplification. In NIH3T3 fibroblasts, active Cdc42 inhibits c-Cbl-regulated EGFR degradation to induce cellular transformation. Here, we use two EGFR-overexpressing b...

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