Grb10: A new substrate of the insulin-like growth factor I receptor.

Morrione, A; Valentinis, B; Li, S; Ooi, J Y; Margolis, B; Baserga, R · Cancer Res · 1996

basic_science · Level V

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Abstract

Using the yeast two-hybrid system, we have isolated a new substrate of the insulin-like growth factor I receptor (IGF-IR), identified as Grb10, a member of the family of SH2 domain proteins. With the help of several mutants of the IGF-IR, we have mapped the binding site of Grb10 between amino acids 1229 and 1245 of the receptor, a sequence that is dispensable for the mitogenic activity of the IGF-IR. Grb10 coprecipitates with the IGF-IR in cell lysates and is probably involved in the regulation of its activity.

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