Different sizes of restriction endonuclease fragments from the terminal repetitions of the herpes simplex virus type 1 genome latent in trigeminal ganglia of mice
- PMID: 6319582
- DOI: 10.1099/0022-1317-65-2-437
Different sizes of restriction endonuclease fragments from the terminal repetitions of the herpes simplex virus type 1 genome latent in trigeminal ganglia of mice
Abstract
Trigeminal ganglion DNA from mice latently infected with herpes simplex virus type 1 was analysed by restriction enzyme digestion, agarose gel electrophoresis and blot hybridization to 32P-labelled viral DNA. Viral DNA from parental virions and from virions obtained as a consequence of reactivation by ganglion neurectomy were similarly analysed. The BamHI restriction fragments of parental and reactivated virions were almost indistinguishable from each other, and several of the larger BamHI fragments of viral DNA were also found in latently infected ganglion at unaltered sizes. In contrast, fractionation of EcoRI fragments of latently infected ganglion DNA by reverse phase column (RPC-5) chromatography, followed by gel electrophoresis and blot hybridization to a viral DNA probe from the S component terminal repetition, revealed the presence of several terminal fragments at discrete sizes ranging from 1 kb to 15 kb, quite unlike the 5.7 kb terminal EcoRI K fragment of virion-derived DNA. These results indicate that structural changes occur in the viral genome concomitantly with the establishment of latency, such as may result from extensive gene rearrangement or integration into cellular DNA.
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