Abstract
Two recombinant collagen-like proteins consisting of cell adhesion domains derived from native type I collagen were designed and synthesized by a genetic engineering method. The cross-linking sequence, GPPGPCCGGG, derived from collagen III was used to promote triple helix formation through the disulfide bonds formed among three chains by flanking the peptide at the C-terminal of the collagen-like proteins. SDS-PAGE and western-blotting data suggested possibility of the formation of a triple helix structure for both recombinant proteins. CD spectra and thermal stability analyses indicated that the triple-helix structure in the collagen-like proteins was pH-dependent and stabilized under acidic environmental condition. Moreover, the collagen-like protein flanked with the cross-linking sequence at the C-terminal showed the most stable triple-helical conformation under acidic conditions.
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