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  • Title: A temperature-sensitive mutation in a herpes simplex virus type 1 gene required for viral DNA synthesis maps to coordinates 0.609 through 0.614 in UL.
    Author: Marchetti ME, Smith CA, Schaffer PA.
    Journal: J Virol; 1988 Mar; 62(3):715-21. PubMed ID: 2828666.
    Abstract:
    ts701 is a temperature-sensitive mutant of herpes simplex virus type 1 strain KOS induced by hydroxylamine mutagenesis (C.T. Chu, D. S. Parris, R. A. F. Dixon, F. E. Farber, and P. A. Schaffer, Virology 98:168-181, 1979). In the present study, the mutation rendering ts701 temperature sensitive was mapped to coordinates 0.609 through 0.614 in the UL region of the genome. At the nonpermissive temperature, ts701 (i) failed to induce the synthesis of viral DNA, (ii) exhibited a dramatically reduced ability to drive replication of a plasmid containing the herpes simplex virus origin of viral DNA synthesis, oriS, (iii) generated no viral polypeptides of the late (gamma 2) kinetic class, and (iv) produced virions with electron-translucent cores. Northern (RNA) blot hybridization demonstrated that two mRNAs--one of the beta kinetic class and one of the gamma kinetic class--hybridized to a 1.3-kilobase viral DNA fragment that rescued the mutation in ts701. Based on the phenotype and mapping of ts701, it is likely that its mutation lies in the gene specifying the 65,000-Mr DNA-binding protein (65KDBP) recently described by Marsden et al. (H.S. Marsden, M.E.M. Campbell, L. Haarr, M. C. Frame, D. S. Parris, M. Murphy, R. G. Hope, M. T. Muller, and C. M. Preston, J. Virol. 61:2428-2437, 1987).
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