Results 101 to 110 of about 958,866 (334)

Differential stimulation of the GTPase activity of G-proteins by polylysine

Biochemical Pharmacology, 1992
Polylysine, polyornithine and, to a lesser extent, polyarginine were found to stimulate the GTPase activity of the purified recombinant alpha subunit of the human G(i)-3 transducing protein alpha i-3. Optimal stimulation of 4- to 5-fold was obtained with polylysine concentrations between 1 and 20 microM, higher concentrations being inhibitory ...
Antonelli, Marcelo, Olate, Juan, Graf, Rolf, Allende, Catherine C., Allende, Jorge E.   +4 more
openaire   +4 more sources

Post‐Translational Modifications in Cilia and Ciliopathies

Advanced Science, EarlyView.
This review synthesizes current understanding of post‐translational modifications (PTMs) in ciliary proteins and emphasizes their roles in ciliary formation, homeostasis, and signaling. This review also discusses the implication of PTM dysregulation in ciliopathies and explores therapeutic strategies targeting PTM‐modifying enzymes.
Jie Ran, Jun Zhou
wiley   +1 more source

The RhoGAP activity of CYK-4/MgcRacGAP functions non-canonically by promoting RhoA activation during cytokinesis

eLife, 2015
Cytokinesis requires activation of the GTPase RhoA. ECT-2, the exchange factor responsible for RhoA activation, is regulated to ensure spatiotemporal control of contractile ring assembly.
Donglei Zhang, Michael Glotzer
doaj   +1 more source

Structural basis for activation and non-canonical catalysis of the Rap GTPase activating protein domain of plexin

eLife, 2013
Plexins are cell surface receptors that bind semaphorins and transduce signals for regulating neuronal axon guidance and other processes. Plexin signaling depends on their cytoplasmic GTPase activating protein (GAP) domain, which specifically inactivates
Yuxiao Wang, H. G. Pascoe, C. Brautigam, Huawei He, Xuewu Zhang   +4 more
semanticscholar   +1 more source

Adducin‐1 Facilitates Influenza Virus Endosomal Trafficking and Uncoating by Regulating Branched Actin Dynamics and Myosin IIB Activity

Advanced Science, EarlyView.
In this study, a novel mechanism is unveiled by which ADD1, acting as a molecular switch, coordinates actin branch dynamics and the transport of endocytic viruses and cargoes. Phosphorylation of ADD1 at Ser726 reduces actin branch density, enhancing endosome fusion and attachment to microtubules.
Meijun Jiang, Jiahui Zou, Yaoming Jin, Chenjun Jiang, Shaoyu Tu, Tong Chen, Jinli Guo, Yanqing Cheng, Meilin Jin, Huanchun Chen, Hongbo Zhou   +10 more
wiley   +1 more source

Advancement in research and therapy of NF1 mutant malignant tumors

Cancer Cell International, 2020
The NF1 gene encodes neurofibromin, which is one of the primary negative regulatory factors of the Ras protein. Neurofibromin stimulates the GTPase activity of Ras to convert it from an active GTP-bound form to its inactive GDP-bound form through its ...
Junyan Tao, Dantong Sun, Lina Dong, Hua Zhu, Helei Hou   +4 more
doaj   +1 more source

MgcRacGAP, A New Human GTPase-activating Protein for Rac and Cdc42 Similar to Drosophila rotundRacGAP Gene Product, Is Expressed in Male Germ Cells*

Journal of Biological Chemistry, 1998
In a search for new partners of the activated form of Rac GTPase, we have isolated through a two-hybrid cloning procedure a human cDNA encoding a new GTPase-activating protein (GAP) for Rho family GTPases. A specific mRNA of 3.2 kilobases was detected in
A. Touré, O. Dorseuil, L. Morin, P. Timmons, B. Jégou, Louise Reibel, G. Gacon   +6 more
semanticscholar   +1 more source

Spatiotemporal Regulation of STING Activity by Linear Ubiquitination Governs Antiviral Immunity

Advanced Science, EarlyView.
This study uncovers a spatiotemporal regulation of STING activity by linear ubiquitination in antiviral immunity. At the early stage of the infection, LUBAC promotes STING linear ubiquitination to drive its trafficking from the ER to the Golgi apparatus for activation.
Yong Zhang, Yesheng Fu, Lihua Qiang, Mengyuan Zhao, Zhe Lu, Zhuo Zhao, Guoping Chen, Zehui Lei, Qiyao Chai, Pupu Ge, Bingxi Li, Jing Wang, Cui Hua Liu, Lingqiang Zhang   +13 more
wiley   +1 more source

Role of Tunneling Nanotubes in Arachidonic Acid Transfer and Macrophage Function Reprogramming in Intrahepatic Cholangiocarcinoma

Advanced Science, EarlyView.
Tunneling nanotubes facilitate the transfer of long‐chain fatty acids, primarily arachidonic acid, from tumor cells to macrophages, leading to lipid accumulation and activation of the PI3K‐Akt pathway. This drives a shift from the anti‐tumor CD5L⁺ phenotype to a pro‐tumor TREM2⁺ phenotype.
Meiru Chen, Shangyumeng Zhao, Xiaoli Xie, Jiaqi Wang, Miao Su, Lixian Zhang, Ruolin Cui, Dongqiang Zhao   +7 more
wiley   +1 more source

MicroRNA-31 Activates the RAS Pathway and Functions as an Oncogenic MicroRNA in Human Colorectal Cancer by Repressing RAS p21 GTPase Activating Protein 1 (RASA1)*

Journal of Biological Chemistry, 2013
Background: MicroRNAs are important for colorectal cancer signal transduction. Results: miR-31 stimulates colorectal cancer cell proliferation and tumorigenesis by directly targeting RASA1. Conclusion: miR-31 activates the RAS pathway and functions as an
Defang Sun, F. Yu, Yutao Ma, Ran Zhao, X. Chen, Jie-Jun Zhu, Chen-Yu Zhang, Jiangning Chen, Junfeng Zhang   +8 more
semanticscholar   +1 more source