Promoter analysis of the Chilo iridescent virus DNA polymerase and major capsid protein genes.

Abstract:

:The DNA polymerase (DNApol) and major capsid protein (MCP) genes were used as models to study promoter activity in Chilo iridescent virus (CIV). Infection of Bombyx mori SPC-BM-36 cells in the presence of inhibitors of DNA or protein synthesis showed that DNApol, as well as helicase, is an immediate-early gene and confirmed that the major capsid protein (MCP) is a late gene. Transcription of DNApol initiated 35 nt upstream and that of MCP 14 nt upstream of the translational start site. In a luciferase reporter gene assay both promoters were active only when cells were infected with CIV. For DNApol sequences between position -27 and -6, relative to the transcriptional start site, were essential for promoter activity. Furthermore, mutation of a G within the sequence TTGTTTT located just upstream of the DNApol transcription initiation site reduced the promoter activity by 25%. Sequences crucial for MCP promoter activity are located between positions -53 and -29.

journal_name

Virology

journal_title

Virology

authors

Nalçacioğlu R,Marks H,Vlak JM,Demirbaĝ Z,van Oers MM

doi

10.1016/j.virol.2003.08.007

subject

Has Abstract

pub_date

2003-12-20 00:00:00

pages

321-9

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042682203006172

journal_volume

317

pub_type

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