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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/41859
Title: Conserved cross-interactions in Drosophila and Xenopus between Ras/MAPK signaling and the dual-specificity phosphatase MKP3
Authors: Ruiz Gómez, Ana; López-Varea, Ana; Molnar, Cristina; Calle-Mustienes, Elisa de la; Ruiz-Gómez, Mar; Gómez-Skarmeta, José Luis; Celis, José F. de
Keywords: Cell signaling
Vein formation
Negative feedback
Neural development
Issue Date: 9-Feb-2005
Publisher: Wiley-Liss
Citation: Developmental Dynamics 232(3): 695-708 (2005)
Abstract: The extracellular signal-regulated kinase (ERK) is a key transducer of the epidermal growth factor receptor (EGFR) and fibroblast growth factor receptor (FGFR) signaling pathways, and its function is required in multiple processes during animal development. The activity of ERK depends on the phosphorylation state of conserved threonine and tyrosine residues, and this state is regulated by different kinases and phosphatases. A family of phosphatases with specificity toward both threonine and tyrosine residues in ERK (dual-specificity phosphatases) play a conserved role in its dephosphorylation and consequent inactivation. Here, we characterize the function of the dual-specificity phosphatase MKP3 in Drosophila EGFR and Xenopus FGFR signaling. The function of MKP3 is required during Drosophila wing vein formation and Xenopus anteroposterior neural patterning. We find that the expression of the MKP3 gene is localized in places of high EGFR and FGFR signaling. Furthermore, this restricted expression depends on ERK function both in Drosophila and Xenopus, suggesting that MKP3 constitutes a conserved negative feedback loop on the activity of the Ras/ERK signaling pathway.
Description: 9 páginas, 7 figuras.
Publisher version (URL): http://dx.doi.org/10.1002/dvdy.20227
URI: http://hdl.handle.net/10261/41859
DOI: 10.1002/dvdy.20227
ISSN: 1058-8388
E-ISSN: 1097-0177
References: PMID: 15704110
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