The Fuselloviridae prototype member Sulfolobus spindle-shaped virus 1 is a model of UV-inducible viruses infecting Crenarchaeota. Previous works on SSV1 UV induction were bases on empirically determined parameters that have not yet been standardized. Thus, in many peer reviewed literature, it is not clear how the fluence and irradiance have been determined. Here, we describe a protocol for the UV induction of SSV1 replication, which is based on the combination of the following instrumentally monitored parameters: (1) the fluence; (2) the irradiance; (3) the exposure time, and (4) the exposure distance. With the aim of finding a good balance between the viral replication induction and the host cells viability, UV-irradiated cultures were monitored for their ability to recover in the aftermath of the UV exposure. This UV irradiation procedure has been set up using the well-characterized Sulfolobus solfataricus P2 strain as model system to study host-virus interaction.
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