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    • 5. 发明授权
    • Differential cytotoxicity of alternative forms of rotavirus nonstructural protein 4
    • 轮状病毒非结构蛋白的替代形式的差异细胞毒性4
    • US06716431B1
    • 2004-04-06
    • US10048540
    • 2001-12-07
    • Peng TianTimothy J. ZambStephen A. Udem
    • Peng TianTimothy J. ZambStephen A. Udem
    • A61K3915
    • C07K14/005A61K39/00C12N2710/14143C12N2720/12322
    • The nonstructural protein 4 (NSP4) in the SA11 ATCC rotavirus strain has a histidine at amino acid position 47. This substituted form is more cytotoxic than the NSP4 of the Australia rotavirus strain, which has an asparagine at amino acid position 47. The histidine at amino acid position 47 is mutagenized to another amino acid to produce an alternative form of NSP4 which has reduced toxicity, while retaining its antigenicity and immunogenicity. NSP4 having a glutamic acid at amino acid position 48 is more cytotoxic than NSP4 having a lysine at amino acid position 48. The lysine at amino acid position 48 is mutagenized to another amino acid other than glutamic acid to produce an alternative form of NSP4 which has reduced toxicity, while retaining its antigenicity and immunogenicity.
    • SA11 ATCC轮状病毒株中的非结构蛋白4(NSP4)在氨基酸位置47具有组氨酸。该取代形式比澳大利亚轮状病毒株的NSP4更具细胞毒性,其在氨基酸位置47具有天冬酰胺。组氨酸在 氨基酸位置47被诱变成另一种氨基酸以产生另一形式的NSP4,其具有降低的毒性,同时保持其抗原性和免疫原性。 在氨基酸位置48具有谷氨酸的NSP4比在氨基酸位置48具有赖氨酸的NSP4更具细胞毒性。氨基酸位置48处的赖氨酸被诱变成除谷氨酸以外的另一种氨基酸,以产生NSP4的替代形式,其具有 降低毒性,同时保持其抗原性和免疫原性。