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Analysis of sequences important for herpes simplex virus type 1 latency-associated transcript promoter activity during lytic infection of tissue culture cells

John A. Morrow

MRC Virology Unit, Institute of Virology, Church Street, Glasgow G11 5JR, U.K.

We describe the analysis of the herpes simplex virus type 1 (HSV-1) latency-associated transcript (LAT) promoter using an HSV-1-based vector system. Sequences under investigation for LAT promoter activity were analysed for their ability to direct chloramphenicol acetyltransferase gene expression, either in transfection assays or following their insertion into an HSV-1 vector from which the endogenous LAT promoter sequences had been removed. The analysis mapped the main determinants of LAT promoter activity during lytic infection of tissue culture cells to a 277 bp region between -279 and -2 relative to the recognized 5' end of the primary 8.3 kb transcript. The LAT promoter constructs behaved similarly in the context of the virus genome and in the plasmid-based transfection assays. Comparison of the relative activities following infection of fibroblast and neuroblastoma cell lines indicates that sequences upstream from -279 are important for LAT promoter activity in neurons.

Present address: Organon Laboratories Limited, Newhouse, Lanarkshire ML1 5SH, U.K.

Received 17 April 1993; accepted 21 September 1993.

This article has been cited by other articles:

				R. L. Thompson and N. M. Sawtell Herpes Simplex Virus Type 1 Latency-Associated Transcript Gene Promotes Neuronal Survival J. Virol., July 15, 2001; 75(14): 6660 - 6675. [Abstract] [Full Text]