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The DNA molecule of varicella-zoster virus (VZV) is represented structurally as L-S, where L is a unique sequence and S is a unique sequence flanked by an inverted repeat. S may be present in either orientation in virion DNA molecules, but, to date, L has been found in only one orientation. DNA sequences were determined at the L-S joint and genome termini, which were cloned using methods designed to conserve either the 3′ or 5′ terminal nucleotide. Molecular hybridization experiments and analysis of the sequences showed that: (i) the genome is not terminally redundant; (ii) the unique sequence in L is flanked by an inverted repeat of 88.5 base pairs; (iii) a single unpaired nucleotide is located at each 3′ terminus of the genome, such that fusion of the termini would produce a sequence identical to that at the L-S joint; (iv) approx. 5% of virions contain genomes with L inverted. The implications of these results in possible mechanisms for VZV DNA replication are discussed.
|Glasgow Author(s) Enlighten ID:||Davison, Dr Andrew|
|College/School:||College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation|
|Journal Name:||Journal of General Virology|