[Characterization of the interaction between low density lipoprotein receptor-related protein-associated protein 1 and the cancer and embryo expression protein 65].

Objective:To understand the mechanism of cancer and embryo expression protein 65 (CEP65) in cancer development Methods:CEP65 was usel as a bait protein to isolate the partners of CEP65 from a human placenta cDNA library with yeast two hybrid system. The DNA fragments from positive clone were expressed prokaryotic and mammalian cells respectively, the GST pull-down experiment was performed to ascertain the binding activity. Results:After screening a human placenta cDNA library, the low density lipoprotein receptor-related protein-associated protein 1 (RAP) was isolated and shown to interact with CEP65. GST pull-down assay results indicated that His-CEP65 and GST-RAP expressed by prokaryotic system were immunoprecipitated,and so were Myc-RAP and GST-P65 expressed by mammalian cells . Conclusion: RAP can interact with CEP65 and RAP may be a candidate to mediate the function of CEP65.