Guanine Nucleotide Exchange Factors

Functions and mechanisms of the GPCR adaptor protein Norbin
Norbin (Neurochondrin, NCDN) is a highly conserved 79 kDa adaptor protein that was first identified more than a quarter of a century …
Stephen A. Chetwynd, Simon Andrews, Sarah Inglesfield, Christine Delon, Nicholas T. Ktistakis, Heidi C. E. Welch
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Dock2 generates characteristic spatiotemporal patterns of Rac activity to regulate neutrophil polarisation, migration and phagocytosis
INTRODUCTION: Rac-GTPases and their Rac-GEF activators play important roles in neutrophil-mediated host defence. These proteins control …
Polly A. Machin, Anna-Karin E. Johnsson, Ellie J. Massey, Chiara Pantarelli, Stephen A. Chetwynd, Julia Y. Chu, Hanneke Okkenhaug, Anne Segonds-Pichon, Simon Walker, Angeliki Malliri, Yoshinori Fukui, Heidi C. E. Welch
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Small-molecule inhibitors of P-Rex guanine-nucleotide exchange factors
P-Rex1 and P-Rex2 are guanine-nucleotide exchange factors (GEFs) that activate Rac small GTPases in response to the stimulation of G …
C. D. Lawson, K. Hornigold, D. Pan, I. Niewczas, S. Andrews, J. Clark, Hce Welch
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P-Rex1 Controls Sphingosine 1-Phosphate Receptor Signalling, Morphology, and Cell-Cycle Progression in Neuronal Cells
P-Rex1 is a guanine-nucleotide exchange factor (GEF) that activates Rac-type small G proteins in response to the stimulation of a range …
Elizabeth Hampson, Elpida Tsonou, Martin J. Baker, David C. Hornigold, Roderick E. Hubbard, Andrew Massey, Heidi C. E. Welch
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PtdIns(3,4,5)P3-dependent Rac exchanger 1 (P-Rex1) promotes mammary tumor initiation and metastasis
The Rac-GEF, P-Rex1, activates Rac1 signaling downstream of G protein-coupled receptors and PI3K. Increased P-Rex1 expression promotes …
Nuthasuda Srijakotre, Heng-Jia Liu, Max Nobis, Joey Man, Hon Yan Kelvin Yip, Antonella Papa, Helen E. Abud, Kurt I. Anderson, Heidi C. E. Welch, Tony Tiganis, Paul Timpson, Catriona A. McLean, Lisa M. Ooms, Christina A. Mitchell
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Rac-GTPases and Rac-GEFs in neutrophil adhesion, migration and recruitment
Rac-GTPases and their Rac-GEF activators play important roles in the recruitment and host defence functions of neutrophils. These …
Chiara Pantarelli, Heidi C. E. Welch
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P-Rex1 directly activates RhoG to regulate GPCR-driven Rac signalling and actin polarity in neutrophils
G-protein-coupled receptors (GPCRs) regulate the organisation of the actin cytoskeleton by activating the Rac subfamily of small …
George Damoulakis, Laure Gambardella, Kent L. Rossman, Campbell D. Lawson, Karen E. Anderson, Yoshinori Fukui, Heidi C. Welch, Channing J. Der, Len R. Stephens, Phillip T. Hawkins
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P-Rex1 cooperates with PDGFRβ to drive cellular migration in 3D microenvironments
Expression of the Rac-guanine nucleotide exchange factor (RacGEF), P-Rex1 is a key determinant of progression to metastasis in a number …
Andrew D. Campbell, Samuel Lawn, Lynn C. McGarry, Heidi C. Welch, Bradford W. Ozanne, Jim C. Norman
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P-Rex1 is required for efficient melanoblast migration and melanoma metastasis
Metastases are the major cause of death from melanoma, a skin cancer that has the fastest rising incidence of any malignancy in the …
Colin R. Lindsay, Samuel Lawn, Andrew D. Campbell, William J. Faller, Florian Rambow, Richard L. Mort, Paul Timpson, Ang Li, Patrizia Cammareri, Rachel A. Ridgway, Jennifer P. Morton, Brendan Doyle, Shauna Hegarty, Mairin Rafferty, Ian G. Murphy, Enda W. McDermott, Kieran Sheahan, Katherine Pedone, Alexander J. Finn, Pamela A. Groben, Nancy E. Thomas, Honglin Hao, Craig Carson, Jim C. Norman, Laura M. Machesky, William M. Gallagher, Ian J. Jackson, Leon Van Kempen, Friedrich Beermann, Channing Der, Lionel Larue, Heidi C. Welch, Brad W. Ozanne, Owen J. Sansom
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P-Rex1 and Vav1 cooperate in the regulation of formyl-methionyl-leucyl-phenylalanine-dependent neutrophil responses
G protein-coupled receptor (GPCR) activation elicits neutrophil responses such as chemotaxis and reactive oxygen species (ROS) …
Campbell D. Lawson, Sarah Donald, Karen E. Anderson, Daniel T. Patton, Heidi C. E. Welch
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