1. Identification of multi-SH3 domain-containing protein interactome in pancreatic cancer: a yeast two-hybrid approach.
- Author
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Thalappilly S, Suliman M, Gayet O, Soubeyran P, Hermant A, Lecine P, Iovanna JL, and Dusetti NJ
- Subjects
- Blotting, Western, Carrier Proteins isolation & purification, Carrier Proteins metabolism, Cell Line, Cell Line, Tumor, Gene Expression Regulation, Neoplastic, Humans, Immunoprecipitation, Oligonucleotide Array Sequence Analysis, Pancreatic Neoplasms genetics, Pancreatic Neoplasms metabolism, Pancreatic Neoplasms pathology, Protein Array Analysis methods, Protein Binding, Proteins metabolism, Two-Hybrid System Techniques, Carrier Proteins genetics, Proteins genetics, Proteomics methods, src Homology Domains genetics
- Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a fatal disease that shows minimal response to chemotherapy. Genetic changes involved in the progression of PDAC concern genes that encode proteins related to signal transduction networks. This fact reveals the importance in identifying the role and the relations between multiple signaling cascades in PDAC. One of the major factors that modulate signaling events is multidomain scaffold proteins that function by binding several proteins simultaneously, inducing their proximity and influencing the outcome of signaling. A particular group among them, containing multiple Src homology 3 (SH3) domains that can bind proteins containing proline-rich motifs, was associated to different aspects of cancer cell homeostasis. In this work, using a microarray-based analysis, we have shown that 13 multiple SH3 domain containing scaffold proteins are expressed in PDAC cells. Using a yeast two-hybrid approach, we have identified proteins that interact with these adaptor proteins. Among them we have found several molecules that modulate cell proliferation and survival (CIZ1, BIRC6, RBBP6), signaling (LTBP4, Notch2, TOM1L1, STK24) and membrane dynamics (PLSCR1, DDEF2, VCP). Our results indicate that interactions mediated by multi-SH3 domain-containing proteins could lead to the formation of dynamic protein complexes that function in pancreatic cancer cell signaling. The identification of such protein complexes is of paramount importance in deciphering pancreatic cancer biology and designing novel therapeutic approaches.
- Published
- 2008
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