The invention relates to an
expression cassette and a method for producing humanized
triple helix collagen by using the
expression cassette, and belongs to the technical field of
genetic engineering. The
expression cassette sequentially comprises a
promoter sequence, a
fusion gene and a terminator sequence from upstream to downstream, the
fusion gene comprises
nucleotide fragments A, B and C, each fragment comprises an immutable region and a variable region, and the variable region is selected from I, II, III, IV and XVII type human collagen. A kex2
protease recognition site KR is introduced into an expression box, so that an expression product can be subjected to trisection
cutting, and three equal-length
peptide chains with a triple-
helix basic structure are formed. The invention also provides a recombinant humanized collagen with a self-assembled
triple helix structure and a production method thereof, and the method comprises the following steps: preparing a
recombinant expression vector containing the expression cassette and a
proline hydroxylase
expression vector, and transferring the two expression vectors into competent cells for co-expression. The method can be used for producing the recombinant humanized collagen with the self-assembled triple-
helix structure, and has a good application prospect.