کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6140273 1594252 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The DR6 protein from human herpesvirus-6B induces p53-independent cell cycle arrest in G2/M
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ویروس شناسی
پیش نمایش صفحه اول مقاله
The DR6 protein from human herpesvirus-6B induces p53-independent cell cycle arrest in G2/M
چکیده انگلیسی


- HHV-6B-encoded DR6 protein inhibits cell proliferation.
- DR6 inhibits host cell DNA synthesis independent of p53.
- DR6 delays the cell cycle in G2/M.
- An N-terminal sequence is necessary for DR6 function.
- DR6 induces cytoplasmic accumulation of cyclin B1.

HHV-6B infection inhibits cell proliferation in G2/M, but no protein has so far been recognized to exert this function. Here we identify the protein product of direct repeat 6, DR6, as an inhibitor of G2/M cell-cycle progression. Transfection of DR6 reduced the total number of cells compared with mock-transfected cells. Lentiviral transduction of DR6 inhibited host cell DNA synthesis in a p53-independent manner, and this inhibition was DR6 dose-dependent. A deletion of 66 amino acids from the N-terminal part of DR6 prevented efficient nuclear translocation and the ability to inhibit DNA synthesis. DR6-induced accumulation of cells in G2/M was accompanied by an enhanced expression of cyclin B1 that accumulated predominantly in the cytoplasm. Pull-down of cyclin B1 brought down pCdk1 with the inactivating phosphorylation at Tyr15. Together, DR6 delays cell cycle with an accumulation of cells in G2/M and thus might be involved in HHV-6B-induced cell-cycle arrest.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Virology - Volumes 452–453, March 2014, Pages 254-263
نویسندگان
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