title: RET alternate splicing influences the interaction of activated RET with the SH2 and PTB domains of Shc, and the SH2 domain of Grb2.
abstract: Activating germline mutations of the RET receptor tyrosine kinase are found in the majority of cases of inherited cancer syndrome MEN 2, and inactivating mutations in some cases of dominantly inherited Hirschsprung disease. Using RET activated by a MEN 2 mutation, we show that both the SH2 and PTB domains of the adaptor protein Shc interact with RET, and we identify the PTB domain interaction site. Interaction with both the SH2 and PTB domains of Shc contributes to the transcriptional activation of a serum response element. RET alternate splicing affects the strength of interaction with both the Shc SH2 and PTB domains. In addition, a splice isoform-specific HSCR missense mutation, which does not inactivate the RET kinase activity, decreases the strength of the PTB domain interaction and the level of RET-dependent Shc phosphorylation.
authors.affiliation: CRC Human Cancer Genetics Research Group, University of Cambridge, Department of Pathology, Cambridge, UK.
authors.forename: M J
authors.initials: MJ
authors.lastname: Lorenzo
authors.forename: G D
authors.initials: GD
authors.lastname: Gish
authors.forename: C
authors.initials: C
authors.lastname: Houghton
authors.forename: T J
authors.initials: TJ
authors.lastname: Stonehouse
authors.forename: T
authors.initials: T
authors.lastname: Pawson
authors.forename: B A
authors.initials: BA
authors.lastname: Ponder
authors.forename: D P
authors.initials: DP
authors.lastname: Smith
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D017398:Alternative Splicing; D000595:Amino Acid Sequence; D029721:Drosophila Proteins; D004789:Enzyme Activation; D051380:GRB2 Adaptor Protein; D006627:Hirschsprung Disease / Q000235:genetics; D006801:Humans; D008969:Molecular Sequence Data; D018813:Multiple Endocrine Neoplasia Type 2a / Q000235:genetics; D009154:Mutation; D010766:Phosphorylation; D011506:Proteins / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000235:genetics / Q000378:metabolism*; D051096:Proto-Oncogene Proteins c-ret; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics / Q000378:metabolism*; D014162:Transfection; D018909:src Homology Domains
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D029721:Drosophila Proteins; D051380:GRB2 Adaptor Protein; C495948:GRB2 protein, human; D011506:Proteins; D011518:Proto-Oncogene Proteins; D051096:Proto-Oncogene Proteins c-ret; D020794:Receptor Protein-Tyrosine Kinases; C416649:Ret protein, Drosophila