Thomas C J, Brown H L, Hawes C R, Lee B Y, Min M K, King L A, Possee R D
NERC Institute of Virology and Environmental Microbiology, Oxford OX1 3SR, United Kingdom.
J Virol. 1998 Dec;72(12):10207-12. doi: 10.1128/JVI.72.12.10207-10212.1998.
Confocal immunofluorescence microscopy was used to demonstrate that the Autographa californica nucleopolyhedrovirus (AcMNPV) chitinase was localized within the endoplasmic reticulum (ER) of virus-infected insect cells. This was consistent with removal of the signal peptide from the chitinase and an ER localization motif (KDEL) at the carboxyl end of the protein. Chitinase release from cells, a prerequisite for liquefaction of virus-infected insect larvae, appears to be aided by synthesis of the p10 protein. Deletion of p10 from the AcMNPV genome delayed the appearance of chitinase activity in the medium of virus-infected cells by 24 h and also delayed liquefaction of virus-infected Trichoplusia ni larvae by the same period.
共聚焦免疫荧光显微镜用于证明苜蓿银纹夜蛾核多角体病毒(AcMNPV)几丁质酶定位于病毒感染昆虫细胞的内质网(ER)中。这与几丁质酶信号肽的去除以及该蛋白质羧基末端的内质网定位基序(KDEL)一致。几丁质酶从细胞中释放是病毒感染昆虫幼虫液化的前提条件,这似乎得益于p10蛋白的合成。从AcMNPV基因组中删除p10会使病毒感染细胞培养基中几丁质酶活性的出现延迟24小时,同时也会使病毒感染的粉纹夜蛾幼虫的液化延迟相同时间。