Adenine DNA methyltransferase M.CviRI expression accelerates apoptosis in baculovirus-infected insect cells.

Abstract:

:The adenine DNA methyltransferase M.CviRI (TGCmA) gene from chlorella virus XZ-6E was cloned into the Autographa californica nuclear polyhedrosis virus (AcMNPV) genome and expressed in Spodoptera frugiperda insect cells under the control of two tandemly arranged viral promoters, the early ETL promoter and the late polyhedrin promoter. M.CviRI activity was first detected at 10 hr p.i and reached a maximum at 48 hr p.i. Viral DNA synthesized in insect cells infected with M.CviRI expressing virus (AcMTRI) was methylated at all TGCA sites. Unexpectedly, AcMTRI-infected cells lysed 48 hr earlier than wild-type AcMNPV-infected cells. Moreover, cellular DNA, but not viral DNA, from AcMTRI-infected cells was degraded to fragment sizes characteristic of apoptosis. These results suggest that M.CviRI methylation influences the onset of viral cytopathic effects and induces an apoptosis-like response.

journal_name

Virology

journal_title

Virology

authors

Xia Y,Van Etten JL,Dobos P,Ling YY,Krell PJ

doi

10.1006/viro.1993.1539

subject

Has Abstract

pub_date

1993-10-01 00:00:00

pages

817-24

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(83)71539-4

journal_volume

196

pub_type

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