Early and late gene expression in pepper huasteco yellow vein virus

• Published in: Journal of general virology 2007-11, Vol.88 (11), p.3145-3153
• Main Authors: Shimada-Beltrán, H, Rivera-Bustamante, R.F
• Format: Article
• Language: English
• Subjects: Artificial Gene Fusion; Begomovirus - genetics; Begomovirus - physiology; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Geminivirus; gene expression; Gene Expression Regulation, Viral; Genes, Reporter; genetic techniques and protocols; Genetics; green fluorescent protein; Green Fluorescent Proteins - biosynthesis; Green Fluorescent Proteins - genetics; microbial genetics; Microbiology; Miscellaneous; Pepper huasteco virus; plant viruses; Plants - virology; Reverse Transcriptase Polymerase Chain Reaction; RNA, Viral - biosynthesis; ssDNA viruses; Time Factors; Transcription, Genetic - physiology; Virology
• ISSN: 0022-1317; 1465-2099
• DOI: 10.1099/vir.0.83003-0

Viral infections usually take place in an orderly manner and can be divided into at least two phases: an early and a late stage. In geminiviruses, plant viruses with a circular, single-stranded DNA genome, expression of viral genes involves complex regulation strategies that suggest the existence of a pattern of temporal gene expression. In this work, the transcription of pepper huasteco yellow vein virus (PHYVV) genes was studied. Green fluorescent protein replacements and RT-PCR analyses were used to monitor PHYVV gene expression chronologically in suspension cells and plant tissue. A model is proposed to describe the order of geminivirus gene expression, where the genes that encode Rep, TrAP and REn are expressed during an early stage of infection. The genes that encode the coat protein and the nuclear shuttle protein are expressed during the late stage of infection.