The invention discloses a recombinant
ubiquitin ligase PTB-U-box
fusion gene and an
expression vector and application thereof. The recombinant
ubiquitin ligase PTB-U-box
fusion gene is formed by connecting a PTB domain
gene of IRS-1 and a U-box domain
gene of carboxy terminus of Hsc70 Interacting
protein (
CHIP), and the specific
nucleotide sequence is shown as SEQ ID No. 1. The constructed PTB-U-box
fusion gene can be cloned to different expression vectors so as to enter
tumor cells through different paths to play a role, and the expression vectors comprise eukaryotic expression vectors or adenovirus expression vectors. After the fusion
gene transfects the
tumor cells, the carcinogenic related
protein IGF-1R of the host
tumor cells can be regulated down, the
cell proliferation and intrusion capacities of the tumor cells are remarkably reduced, and the fusion gene shows proliferation inhibition and intrusion inhibition on the tumor cells so as to achieve the anti-tumor effect.