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Cyclin D1 interacts and collaborates with Ral GTPases enhancing cell detachment and motility

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Fecha de publicación
2011
Autor/a
Fernández, Rosa M. H.
Ruiz Miró, Maria
Dolcet Roca, Xavier
Aldea, Martí
Garí Marsol, Eloi
Cita recomendada
Fernández, Rosa M. H.; Ruiz Miró, Maria; Dolcet Roca, Xavier; Aldea, Martí; Garí Marsol, Eloi; . (2011) . Cyclin D1 interacts and collaborates with Ral GTPases enhancing cell detachment and motility. Oncogene, 2011, vol. 30, p. 1936-1946. https://doi.org/10.1038/onc.2010.577.
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Resumen
Alterations in the levels of adhesion and motility of cells are critical events in the development of metastasis. Cyclin D1 (CycD1) is one of the most frequently amplified oncogenes in many types of cancers and it is also associated with the development of metastasis. Despite this, we still do not know which are all the relevant pathways by which CycD1 induces oncogenic processes. CycD1 functions can be either dependent or independent of the cyclin-dependent kinase Cdk4, and they affect several cellular aspects such as proliferation, cell attachment and migration. In this work, we reveal a novel function of CycD1 that fosters our understanding of the oncogenic potential of CycD1. We show that CycD1 binds to the small GTPases Ral A and B, which are involved, through exocyst regulation, in the progression of metastatic cancers, inducing anchorage-independent growth and cell survival of transformed cells. We show that CycD1 binds active Ral complexes and the exocyst protein Sec6, and co-localizes with Ral GTPases in trans-Golgi and exocyst-rich regions. We have also observed that CycD1–Cdk4 phosphorylates the Ral GEF Rgl2 ‘in vitro’ and that CycD1–Cdk4 activity stimulates accumulation of the Ral GTP active forms. In accordance with this, our data suggest that CycD1–Cdk4 enhances cell detachment and motility in collaboration with Ral GTPases. This new function may help explain the contribution of CycD1 to tumor spreading.
URI
http://hdl.handle.net/10459.1/59092
DOI
https://doi.org/10.1038/onc.2010.577
Es parte de
Oncogene, 2011, vol. 30, p. 1936-1946
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  • Publicacions de projectes de recerca del Plan Nacional [2948]
  • Articles publicats (Ciències Mèdiques Bàsiques) [580]

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