ARHGEF7 Antibody

Product Datasheet ARHGEF7 Antibody Catalog No: #AB32163 Orders: [email protected] Description Support: [email protected] Product Name ARHGEF7 Antibody Host Species Rabbit Clonality Polyclonal Purification Antibodies were purified by affinity purification using immunogen. Applications WB IHC Species Reactivity Hu Ms Rt Specificity The antibody detects endogenous level of total ARHGEF7 protein. Immunogen Type Recombinant Protein Immunogen Description Recombinant protein of human ARHGEF7. Target Name ARHGEF7 Other Names ARHGEF7; BETA-PIX; COOL1; DKFZp686C12170; DKFZp761K1021 Accession No. Swiss-Prot:Q14155NCBI Gene ID:8874 SDS-PAGE MW 90KD Concentration 1.0mg/ml Formulation Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Storage Store at -20°C Application Details Western blotting: 1:500 - 1:2000 Immunohistochemistry: 1:50 - 1:100 Images Western blot analysis of extracts of various cell lines, using ARHGEF7 antibody. Background Cool/Pix proteins comprise a family of guanine nucleotide exchange factors (GEFs) localized to focal adhesions. The family consists of two isoforms, cool2/αpix and cool1/βPix, the latter having two splice variants that vary in their carboxy termini (1). Cool1/βPix, like other GEFs, has a DH (Dbl Address: 8400 Baltimore Ave. Suite 302 College Park MD 20740 USA http://www.abscitech.com 1 homology) domain, which allows binding of small GTPases and GDP/GTP exchange, and a PH (Pleckstrin homology) domain, which is important in regulating subcellular localization. Cool1/βPix also has an SH3 domain, which binds to the PAK kinase, a downstream effector of cdc42 and Rac (3,4). Phosphorylation of cool1/βPix by PAK2 downstream of MAPK signaling alters the localization of a complex containing PAK2 and cool-1/βPix, regulating formation of growth cones in response to growth factors (4). Growth factor induced activation of Rac1 via cool1/βPix was later shown to occur independently of subcellular localization (5). Endothelin-1 stimulation of mesangial cells stimulates the protein kinase A (PKA) pathway, resulting in translocation of cool-1/βPix and activation of cdc42 (6). Note: This product is for in vitro research use only and is not intended for use in humans or animals. Address: 8400 Baltimore Ave. Suite 302 College Park MD 20740 USA http://www.abscitech.com 2.

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Regulation of Cdc42 and Its Effectors in Epithelial Morphogenesis Franck Pichaud1,2,*, Rhian F
© 2019. Published by The Company of Biologists Ltd | Journal of Cell Science (2019) 132, jcs217869. doi:10.1242/jcs.217869 REVIEW SUBJECT COLLECTION: ADHESION Regulation of Cdc42 and its effectors in epithelial morphogenesis Franck Pichaud1,2,*, Rhian F. Walther1 and Francisca Nunes de Almeida1 ABSTRACT An overview of Cdc42 Cdc42 – a member of the small Rho GTPase family – regulates cell Cdc42 was discovered in yeast and belongs to a large family of small – polarity across organisms from yeast to humans. It is an essential (20 30 kDa) GTP-binding proteins (Adams et al., 1990; Johnson regulator of polarized morphogenesis in epithelial cells, through and Pringle, 1990). It is part of the Ras-homologous Rho subfamily coordination of apical membrane morphogenesis, lumen formation and of GTPases, of which there are 20 members in humans, including junction maturation. In parallel, work in yeast and Caenorhabditis elegans the RhoA and Rac GTPases, (Hall, 2012). Rho, Rac and Cdc42 has provided important clues as to how this molecular switch can homologues are found in all eukaryotes, except for plants, which do generate and regulate polarity through localized activation or inhibition, not have a clear homologue for Cdc42. Together, the function of and cytoskeleton regulation. Recent studies have revealed how Rho GTPases influences most, if not all, cellular processes. important and complex these regulations can be during epithelial In the early 1990s, seminal work from Alan Hall and his morphogenesis. This complexity is mirrored by the fact that Cdc42 can collaborators identified Rho, Rac and Cdc42 as main regulators of exert its function through many effector proteins.
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ARHGEF7 (B-PIX) Is Required for the Maintenance of Podocyte Architecture and Glomerular Function
BASIC RESEARCH www.jasn.org ARHGEF7 (b-PIX) Is Required for the Maintenance of Podocyte Architecture and Glomerular Function Jun Matsuda, Mirela Maier, Lamine Aoudjit, Cindy Baldwin, and Tomoko Takano Division of Nephrology, McGill University Health Centre, Montreal, Quebec, Canada ABSTRACT Background Previous studies showed that Cdc42, a member of the prototypical Rho family of small GTPases and a regulator of the actin cytoskeleton, is critical for the normal development and health of podocytes. However, upstream regulatory mechanisms for Cdc42 activity in podocytes are largely unknown. Methods We used a proximity-based ligation assay, BioID, to identify guanine nucleotide exchange fac- tors that activate Cdc42 in immortalized human podocytes. We generated podocyte-specificARHGEF7 (commonly known as b-PIX) knockout mice by crossing b-PIX floxed mice with Podocin-Cre mice. Using shRNA, we established cultured mouse podocytes with b-PIX knockdown and their controls. Results We identified b-PIX as a predominant guanine nucleotide exchange factor that interacts with Cdc42 in human podocytes. Podocyte-specific b-PIX knockout mice developed progressive proteinuria and kidney failure with global or segmental glomerulosclerosis in adulthood. Glomerular podocyte density gradually decreased in podocyte-specific b-PIX knockout mice, indicating podocyte loss. Compared with controls, glomeruli from podocyte-specific b-PIX knockout mice and cultured mouse podocytes with b-PIX knockdown exhibited significant reduction in Cdc42 activity. Loss of b-PIX promoted podocyte apoptosis, which was mediated by the reduced activity of the prosurvival transcriptional regulator Yes-associated protein. Conclusions These findings indicate that b-PIX is required for the maintenance of podocyte architecture and glomerular function via Cdc42 and its downstream Yes-associated protein activities.
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Redefining the Specificity of Phosphoinositide-Binding by Human
bioRxiv preprint doi: https://doi.org/10.1101/2020.06.20.163253; this version posted June 21, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC 4.0 International license. Redefining the specificity of phosphoinositide-binding by human PH domain-containing proteins Nilmani Singh1†, Adriana Reyes-Ordoñez1†, Michael A. Compagnone1, Jesus F. Moreno Castillo1, Benjamin J. Leslie2, Taekjip Ha2,3,4,5, Jie Chen1* 1Department of Cell & Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801; 2Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205; 3Department of Biophysics, Johns Hopkins University, Baltimore, MD 21218; 4Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205; 5Howard Hughes Medical Institute, Baltimore, MD 21205, USA †These authors contributed equally to this work. *Correspondence: [email protected]. bioRxiv preprint doi: https://doi.org/10.1101/2020.06.20.163253; this version posted June 21, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC 4.0 International license. ABSTRACT Pleckstrin homology (PH) domains are presumed to bind phosphoinositides (PIPs), but specific interaction with and regulation by PIPs for most PH domain-containing proteins are unclear. Here we employed a single-molecule pulldown assay to study interactions of lipid vesicles with full-length proteins in mammalian whole cell lysates.
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