Abstract
This paper presents cloning of cDNA of lipoprotein lipase (LPL) gene from Xuhuai goat, and the sub-cellular localization analysis through enhanced green fluorescent (EGFP) fusion protein. cDNA was cloned by reverse transcription polymerase chain reaction (RT-PCR). Fusion expression vector named pEGFP-LPL was constructed successfully. Then NIH-3T3 cells were transfected with pEGFP-LPL through polyethylene imine and observed under inverted microscope after 48 h transfection. The RT-PCR was performed to analysis the level of expression of mRNA. The complete coding sequence (1,530 bp) of LPL was acquired, and the open reading frame size was 1,437 bp with a capacity to encode 478 amino acids. The prediction of signal peptide region showed that LPL protein contained a short signal peptide with a probability of 100 %, and the signal peptidase cleavage site located between the 23rd and the 24th amino acid with a probability of 65.9 %. RT-PCR results showed the LPL mRNA expressed successfully in vitro. Sub-cellullar localization analysis showed that pEGFP-LPL fusion protein located at the cytoplasm. LPL gene of Xuhuai goat was transfer into sheep by testicular injection. According to detection from different level, the LPL gene was expressed successfully in F(1) generation.
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