Production of functional polypeptides originating from silk protein and use thereof
申请人:——
公开号:US20040219630A1
公开(公告)日:2004-11-04
It is an object to provide polypeptide compositions originating from silk protein which have not only excellent cell growth-promoting activity associated with undegraded silk fibroin and sericin, the fibroin H-chain and L-chain, or the a component of sericin, but also excellent touch, extensibility, and the like inherent in fibroin and sericin having a molecular weight not higher than 200,000. A method for producing functional polypeptide compositions originating from silk protein having an average molecular weight not lower than 10,000 and not higher than 200,000 and being excellent for cell growth-promoting activity, extensibility and the like, comprising; solubilizing a raw silk protein material from the domesticated silkworm or
Antheraea yamamai
in an aqueous solution of neutral salt, the raw silk protein material having an average molecular weight larger than 200,000 and at least a part or the whole of the H-chain and L-chain of silk fibroin and sericin a left undegraded in the case of the raw silk protein material from the domesticated silkworm; treating subsequently the solution with a peptide bond-cleaving agent; and cleaving peptide bonds between specific amino acid residues of silk protein.
本发明的目的是提供源自蚕丝蛋白的多肽组合物,这些组合物不仅具有与未降解的蚕丝纤维蛋白和丝胶,纤维蛋白H链和L链或丝胶的a组分相关的优秀细胞生长促进活性,而且具有分子量不高于200,000的纤维蛋白和丝胶固有的优秀触感、可伸展性等特性。一种制备源自蚕丝蛋白的功能性多肽组合物的方法,其平均分子量不低于10,000,不高于200,000,并且具有细胞生长促进活性、可伸展性等优点,包括:将家蚕或山蚕蛾的原始蚕丝蛋白材料在中性盐的水溶液中溶解,该原始蚕丝蛋白材料的平均分子量大于200,000,并且在家蚕的原始蚕丝蛋白材料中,至少部分或全部的纤维蛋白H链和L链以及丝胶未被降解;随后用肽键裂解剂处理溶液;并且裂解蚕丝蛋白的特定氨基酸残基之间的肽键。