Molecular characterization and functional analysis of a protease-related protein in Chang-liver cells.

In this study, the cDNA library of Chang-liver cells was immunoscreened using common ADAMs antibody to obtain ADAM related genes. We found one positive clone that was confirmed as a new gene by Blast, which is an uncharacterized helical and coil protein and processes protease activity, and named protease-related protein 1 The submitted GenBank accession number is AY078070. Molecular characterizations of were analyzed with appropriate bioinformatics software. To analyse its expression and function, duanyu371 was subcloned into glutathione S-transferase fusion plasmid pGEX-2T and expressed by E. coli system. The in vitro expression product of duanyu371 was recognized by common ADAMs antibody with western blot. Interestingly, duanyu371 cleaves gelatine at pH9.5, which suggests it is an alkaline protease. Semi-quantitative RT-PCR result indicates that duanyu371 mRNA is strongly transcribed in the liver and the treated Chang-liver cells.

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