design and construction of two yeast shuttle vectors containing human procollagen genes expression cassette for expression in yeast

collagens are the most abundant proteins in the human body. their main function is to provide structural and mechanical support for the tissues, but they are also involved in a number of other biological functions including cell attachment, migration and differentiation. collagens and gelatins are widely used in pharmaceutical and medical applications. every year, more than 50,000 tons of collagen and gelatin are used in medical applications. these materials may have some viral and prion impurity and/or stimulate allergic responses in human body. therefore, scientists have produced human collagen in recombinant systems. in this study we have constructed two yeast shuttle vectors containing human procollagen genes expression cassette for expression in yeast. total rna was extracted from human skin fibroblast cell line, and cdna synthesis was done by oligo dt. then gene fragments were amplified from the cdna with the necessary changes by polymerase chain reaction (pcr). finally they were cloned in yeast vector ppiczαa containing regulatory sequences for expressing and secreting the polypeptide product. two yeast shuttle vectors containing human col1a1 and col1a2 expression cassettes were created. final constructs were confirmed by enzymatic digestion, pcr of desired fragment and sequencing. the yeast shuttle vectors containing human col1a1 and col1a2 can be transferred into the yeast in the later stages to determine the scale of expression.