Viruses as prey?
zxiong at ag.arizona.edu
Fri Sep 1 23:22:22 EST 1995
In article <4256js$f4s at cisunix1.dfci.harvard.edu> york at mbcrr.dfci.harvard.edu (Ian A. York) writes:
>I must have missed it, because I'm sure that someone in this
>viruses-as-prey thread must have already pointed at hepatitis delta
>virus, adeno-associated virus, and some of the plant viroids. If not,
>then I just have.
Yes, hepatits delta virus is an example of a virus predator, however, viroids
are not predators of viruses. Viroids are autonomous replicating RNA molecules
without dependence on other viruses. On the other hand, there are several type
of subviral agents that are parasites of viruses.
Satellite RNA and satellite viruses do "prey" on viruses in a way. They
utilize the RNA replication machinary assembled by the host viruses for their
own replication, much the same as the viruses utilizing the host protein and
nucleic acid synthesis system. Another class of predators of viruses is
defective intefering RNA, which derived from the host viruses, but does not
code for any genes, a pure parasite.
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