RGD Reference Report - Selective role for RGS12 as a Ras/Raf/MEK scaffold in nerve growth factor-mediated differentiation. - Rat Genome Database

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Selective role for RGS12 as a Ras/Raf/MEK scaffold in nerve growth factor-mediated differentiation.

Authors: Willard, MD  Willard, FS  Li, X  Cappell, SD  Snider, WD  Siderovski, DP 
Citation: Willard MD, etal., EMBO J. 2007 Apr 18;26(8):2029-40. Epub 2007 Mar 22.
RGD ID: 7207398
Pubmed: PMID:17380122   (View Abstract at PubMed)
PMCID: PMC1852785   (View Article at PubMed Central)
DOI: DOI:10.1038/sj.emboj.7601659   (Journal Full-text)

Regulator of G-protein signaling (RGS) proteins accelerate GTP hydrolysis by heterotrimeric G-protein alpha subunits and thus inhibit signaling by many G protein-coupled receptors. Several RGS proteins have a multidomain architecture that adds further complexity to their roles in cell signaling in addition to their GTPase-accelerating activity. RGS12 contains a tandem repeat of Ras-binding domains but, to date, the role of this protein in Ras-mediated signal transduction has not been reported. Here, we show that RGS12 associates with the nerve growth factor (NGF) receptor tyrosine kinase TrkA, activated H-Ras, B-Raf, and MEK2 and facilitates their coordinated signaling to prolonged ERK activation. RGS12 is required for NGF-mediated neurite outgrowth of PC12 cells, but not outgrowth stimulated by basic fibroblast growth factor. siRNA-mediated knockdown of RGS12 expression also inhibits NGF-induced axonal growth in dissociated cultures of primary dorsal root ganglia neurons. These data suggest that RGS12 may play a critical, and receptor-selective, role in coordinating Ras-dependent signals that are required for promoting and/or maintaining neuronal differentiation.

Gene Ontology Annotations    Click to see Annotation Detail View

Cellular Component
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
protein-containing complex  IDA 7207398 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Rgs12  (regulator of G-protein signaling 12)


Additional Information