4pp4

Structural highlights

Function

NS1_MUMIP Multifunctional protein that plays an essential role in viral DNA replication. Inhibits the host cell cycle during the G1/S transition, the S-phase, and the G2/M transition. These arrests may provide essential cellular factors for viral DNA replication. Interacts specifically with the viral DNA origin of replication and plays a direct role in DNA replication. Participates in the transcriptional regulation of several promoters including the viral p38 promoter that regulates the expression of VP1 and VP2 transcripts. Promotes apoptosis in host cell.^{[1] [2] [3] [4]}

References

1. ↑ Op De Beeck A, Sobczak-Thepot J, Sirma H, Bourgain F, Brechot C, Caillet-Fauquet P. NS1- and minute virus of mice-induced cell cycle arrest: involvement of p53 and p21(cip1). J Virol. 2001 Nov;75(22):11071-8. PMID:11602746 doi:http://dx.doi.org/10.1128/JVI.75.22.11071-11078.2001
2. ↑ Mincberg M, Gopas J, Tal J. Minute virus of mice (MVMp) infection and NS1 expression induce p53 independent apoptosis in transformed rat fibroblast cells. Virology. 2011 Mar 30;412(1):233-43. doi: 10.1016/j.virol.2010.12.035. Epub 2011 , Feb 3. PMID:21295324 doi:http://dx.doi.org/10.1016/j.virol.2010.12.035
3. ↑ Christensen J, Cotmore SF, Tattersall P. Minute virus of mice transcriptional activator protein NS1 binds directly to the transactivation region of the viral P38 promoter in a strictly ATP-dependent manner. J Virol. 1995 Sep;69(9):5422-30. PMID:7636987
4. ↑ Op De Beeck A, Caillet-Fauquet P. The NS1 protein of the autonomous parvovirus minute virus of mice blocks cellular DNA replication: a consequence of lesions to the chromatin? J Virol. 1997 Jul;71(7):5323-9. PMID:9188601