Abstract
The complete CDS sequences of three porcine genes: UCHL3, RIT1 and CCND3 were amplified using RT-PCR based on the sequence information of the mouse or other mammals and referenced highly homologous pig ESTs. Sequence analysis of these three genes revealed that the porcine UCHL3 gene encodes a protein of 230 amino acids and has high homology with the ubiquitin carboxyl-terminal hydrolase isozyme L3 (UCHL3) of four species-bovine (97%), human (96%), mouse (95%) and rat (94%). The porcine RIT1 gene encodes a protein of 219 amino acids and has high homology with the GTP-binding protein Rit1 (RIT1) of two species-human (97%), mouse (97%). The porcine CCND3 gene encodes a protein of 292 amino acids and has high homology with the G1/S-specific cyclin-D3 (CCND3) of four species-bovine (98%), human (97%), mouse (93%) and rat (92%). The phylogenetic tree analysis revealed that the swine UCHL3 has a closer genetic relationship with the UCHL3 of bovine, and the swine RIT1 has closer genetic relationships with the RIT1 of human, but the swine CCND3 has a closer genetic relationship with the CCND3 of bovine. The RT-PCR gene expression analysis indicated that the swine UCHL3, RIT1 and CCND3 genes were differentially expressed in tissues including small intestine, large intestine, liver, muscle, fat, lung, spleen and kidney. Our experiment established the primary foundation for further research on these three swine genes.
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