| Literature DB >> 14698670 |
Remziye Nalçacioğlu1, Hendrik Marks, Just M Vlak, Zihni Demirbaĝ, Monique M van Oers.
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.Entities:
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Year: 2003 PMID： 14698670 DOI： 10.1016/j.virol.2003.08.007
Source DB: PubMed Journal: Virology ISSN： 0042-6822 Impact factor: 3.616