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2013-02-18

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cc-by-nc-nd (c) Pérez, Yolanda et al., 2013
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/44749

Lipid binding by the unique and SH3 domains of c-Src suggests a new regulation mechanism

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http://dx.doi.org/10.1038/srep0129

Abstract

c-Src is a non-receptor tyrosine kinase involved in numerous signal transduction pathways. The kinase,SH3 and SH2 domains of c-Src are attached to the membrane-anchoring SH4 domain through the flexible Unique domain. Here we show intra- and intermolecular interactions involving the Unique and SH3 domains suggesting the presence of a previously unrecognized additional regulation layer in c-Src. We have characterized lipid binding by the Unique and SH3 domains, their intramolecular interaction and its allosteric modulation by a SH3-binding peptide or by Calcium-loaded calmodulin binding to the Unique domain. We also show reduced lipid binding following phosphorylation at conserved sites of the Unique domain. Finally, we show that injection of full-length c-Src with mutations that abolish lipid binding by the Unique domain causes a strong in vivo phenotype distinct from that of wild-type c-Src in a Xenopus oocyte model system, confirming the functional role of the Unique domain in c-Src regulation.

Subject

Proteïnes quinases, Lípids, Receptors cel·lulars, Regulació cel·lular, Lligands (Bioquímica)

Subject (English)

Protein kinases, Lipids, Cell receptors, Cellular control mechanisms, Ligands (Biochemistry)

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Articles publicats en revistes (Química Inorgànica i Orgànica)
Publicacions de projectes de recerca finançats per la UE

Citation

PÉREZ, Yolanda, et al. Lipid binding by the unique and SH3 domains of c-Src suggests a new regulation mechanism. Scientific Reports. 2013. Vol. 3, num. 1295. ISSN 2045-2322. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/44749

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