Genetic rearrangements on the Chlorovirus genome that switch between hyaluronan synthesis and chitin synthesis.

Abstract:

:Chlorella viruses or chloroviruses form polysaccharide fibers on the cell wall of host Chlorella cells after infection. Such polysaccharides are either hyaluronan synthesized by virus-encoded hyaluronan synthase (HAS) or chitin synthesized by viral chitin synthase (CHS). Some chloroviruses synthesize both hyaluronan (HA) and chitin simultaneously. To understand the relationship between "HA-synthesizing" and "chitin-synthesizing" viruses, we characterized the CVK2 genomic regions, one flanking chs and the other corresponding to PBCV-1 has and found that on CVK2 DNA, a single ORF (PBCV-1 A330R) was replaced with a 5 kbp region containing chs, ugdh2 (the second gene for UDP-glucose dehydrogenase) and two other ORFs, and that has was replaced with another chs gene. In some chloroviruses, ugdh was lost. These results suggest that chlorovirus types changed from "has viruses" to "chs viruses" or from "chs viruses" to "has viruses" by exchanging the genes.

journal_name

Virology

journal_title

Virology

authors

Mohammed Ali AM,Kawasaki T,Yamada T

doi

10.1016/j.virol.2005.07.026

subject

Has Abstract

pub_date

2005-11-10 00:00:00

pages

102-10

issue

1

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(05)00447-2

journal_volume

342

pub_type

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