Multiple functions for ORF75c in murid herpesvirus-4 infection.

Multiple functions for ORF75c in murid herpesvirus-4 infection.
复制标题

ORF75c 在鼠疱疹病毒 4 感染中的多种功能。

DOI:
10.1371/journal.pone.0002781
复制
发表时间:
2008-07-23
期刊:
影响因子:
3.7
通讯作者:
Stevenson, Philip G.
Stevenson, Philip G.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gaspar, Miguel;Gill, Michael B.;Loesing, Jens-Bernhard;May, Janet S.;Stevenson, Philip G.

文献摘要

参考文献

被引文献

相似文献

所有γ-疱疹病毒编码至少一种细胞酶甲酰-甘氨酸酰胺-磷酸核糖基-酰胺转移酶的同源物。MuHV-4编码3(ORF 75 a、75 b和75 c),表明至少一些拷贝获得了新的功能。在这里,我们表明,相应的蛋白质都存在于病毒粒子和本地化感染的细胞核。尽管有这些共同的特征,但ORF 75 a和75 b在功能上不能取代ORF 75 c的缺失,因为ORF 75 c病毒敲除严重损害了体外裂解复制和体内宿主定殖。他们表现出2个缺陷:进入的衣壳在膜融合后不能迁移到核边缘,到达核的基因组不能启动正常的基因表达。后一种缺陷与进入的病毒体未能分解PML体有关。衣壳转运缺陷似乎在功能上更重要,因为ORF 75 c − MuHV-4对PML+和PML−细胞的感染都很差。因此,最初的宿主酶已经进化成一组独特的和多功能的病毒被膜蛋白。一个重要的功能是将进入的衣壳移动到核边缘,用于病毒基因组递送。
All gamma-herpesviruses encode at least one homolog of the cellular enzyme formyl-glycineamide-phosphoribosyl-amidotransferase. Murid herpesvirus-4 (MuHV-4) encodes 3 (ORFs 75a, 75b and 75c), suggesting that at least some copies have acquired new functions. Here we show that the corresponding proteins are all present in virions and localize to infected cell nuclei. Despite these common features, ORFs 75a and 75b did not substitute functionally for a lack of ORF75c, as ORF75c virus knockouts were severely impaired for lytic replication in vitro and for host colonization in vivo. They showed 2 defects: incoming capsids failed to migrate to the nuclear margin following membrane fusion, and genomes that did reach the nucleus failed to initiate normal gene expression. The latter defect was associated with a failure of in-coming virions to disassemble PML bodies. The capsid transport deficit seemed to be functionally more important, since ORF75c− MuHV-4 infected both PML+ and PML− cells poorly. The original host enzyme has therefore evolved into a set of distinct and multi-functional viral tegument proteins. One important function is moving incoming capsids to the nuclear margin for viral genome delivery.
DOI: 10.1128/jvi.74.15.6964-6974.2000
发表时间: 2000-08-01
影响因子: 5.4
作者:
Adler, H;Messerle, M;Koszinowski, UH
通讯作者: Koszinowski, UH
DOI: 10.1099/0022-1317-71-6-1355
发表时间: 1990-06-01
影响因子: 3.8
作者:
EFSTATHIOU, S;HO, YM;MINSON, AC
通讯作者: MINSON, AC
DOI: 10.1099/vir.0.82284-0
发表时间: 2007-01-01
影响因子: 3.8
作者:
Hart, Jane;Ackermann, Mathias;Stewart, James P.
通讯作者: Stewart, James P.
DOI: 10.1099/vir.0.83519-0
发表时间: 2008-06
期刊: The Journal of general virology
影响因子: --
作者:
Gillet L;Colaco S;Stevenson PG
通讯作者: Stevenson PG