Abstract
A type II restriction endonuclease, CviBI, was isolated from a eukaryotic, Chlorella-like green alga infected with the dsDNA containing virus NC-1A. The enzyme recognizes the sequence GANTC and cleaves DNA between the G and A. Methylation of deoxyadenosine in the GANTC sequence probably inhibits enzyme activity. In vitro CviBI cleaves host nuclear DNA but not viral DNA. A survey of 18 other viruses which infect the same Chlorella sp. revealed that infection with 5 of these viruses also induced a restriction endonuclease which cleaves DNA into the same size fragments as CviBI.
MeSH Terms
Base Sequence
Chlorella/enzymology
DNA/metabolism
DNA (Cytosine-5-)-Methyltransferases
DNA Restriction Enzymes/isolation & purification,metabolism
DNA Viruses/physiology
DNA, Viral/metabolism
Deoxyribonucleases, Type II Site-Specific
Enzyme Induction
Methylation
Plant Viruses/physiology
Chemicals
DNA, Viral
DNA
DNA (Cytosine-5-)-Methyltransferases
DNA Restriction Enzymes
Deoxyribonucleases, Type II Site-Specific
GANTC-specific type II deoxyribonucleases
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Xia Y
Burbank D E
Van Etten J L
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10 references, click to expand
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