Animals

Integrin activation by P-Rex1 is required for selectin-mediated slow leukocyte rolling and intravascular crawling
Integrin activation is essential for the function of leukocytes. Impaired integrin activation on leukocytes is the hallmark of the …
Jan M. Herter, Jan Rossaint, Helena Block, Heidi Welch, Alexander Zarbock
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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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Ca2+-dependent monomer and dimer formation switches CAPRI Protein between Ras GTPase-activating protein (GAP) and RapGAP activities
CAPRI is a member of the GAP1 family of GTPase-activating proteins (GAPs) for small G proteins. It is known to function as an amplitude …
Yanfeng Dai, Simon A. Walker, Edwin De Vet, Simon Cook, Heidi C. E. Welch, Peter J. Lockyer
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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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Control of cerebellar long-term potentiation by P-Rex-family guanine-nucleotide exchange factors and phosphoinositide 3-kinase
Long-term potentiation (LTP) at the parallel fibre-Purkinje cell synapse in the cerebellum is a recently described and poorly …
Claire Jackson, Heidi C. Welch, Tomas C. Bellamy
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P-Rex2 regulates Purkinje cell dendrite morphology and motor coordination
The small GTPase Rac controls cell morphology, gene expression, and reactive oxygen species formation. Manipulations of Rac activity …
Sarah Donald, Trevor Humby, Ian Fyfe, Anne Segonds-Pichon, Simon A. Walker, Simon R. Andrews, W. John Coadwell, Piers Emson, Lawrence S. Wilkinson, Heidi C. E. Welch
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Membrane translocation of P-Rex1 is mediated by G protein betagamma subunits and phosphoinositide 3-kinase
P-Rex1 is a guanine-nucleotide exchange factor (GEF) for the small GTPase Rac that is directly activated by the betagamma subunits of …
Mark A. Barber, Sarah Donald, Sylvia Thelen, Karen E. Anderson, Marcus Thelen, Heidi C. E. Welch
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PI3K and RAC signalling in leukocyte and cancer cell migration
Leukocytes and amoeboid-stage cancer cells migrate in a similar manner. Key signalling molecules regulating leukocyte and cancer cell …
Mark A. Barber, Heidi C. E. Welch
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Purification of P-Rex1 from neutrophils and nucleotide exchange assay
The P-Rex family of guanine-nucleotide exchange factors (GEFs) are activators of the small GTPase Rac (Donald et al., 2004; Rosenfeldt …
Kirsti Hill, Heidi C. E. Welch
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Regulation of P-Rex1 by phosphatidylinositol (3,4,5)-trisphosphate and Gbetagamma subunits
P-Rex1 is a guanine-nucleotide exchange factor (GEF) for the small GTPase Rac. We have investigated here the mechanisms of stimulation …
Kirsti Hill, Sonja Krugmann, Simon R. Andrews, W. John Coadwell, Peter Finan, Heidi C. E. Welch, Phillip T. Hawkins, Len R. Stephens
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