PMID:14159

Citation	Gates, FT 3rd and Linn, S (1977) Endonuclease V of Escherichia coli. J. Biol. Chem. 252:1647-53
Abstract	A small endodeoxyribonuclease )2.3 S) that is active on single-stranded DNA has been extensively purified from Escherichia coli so as to be free of other known DNases. It has an alkaline pH optimum (9.5), requires Mg2+, and makes 3'-hydroxy and 5'-phosphate termini. The nuclease nicks duplex DNA, particularly if treated with OsO4, irradiated with ultraviolet light, or exposed to pH 5. The uracil-containing duplex DNA from the Bacillus subtilis phage PBS-2 is an especially good substrate; it is made acid-soluble by levels of the enzyme which fail to produce any acid-soluble material in other single-stranded or duplex DNAs. Neither RNA nor RNA-DNA hybrid are degraded by the enzyme. The enzyme specificity suggests that it might act at abnormal regions in DNA, so that its in vivo function could be to initiate an excision repair sequence. Its high activity on uracil-containing DNA could imply that the enzyme provides an alternative mechanism for excising uracil residues from DNA to the pathway utilizing uracil-DNA N-glycosidase. We suggest that this enzyme be designated as endonuclease V of E. coli.
Links	PubMed
Keywords	Cations, Divalent; Deoxyribonucleases/isolation & purification; Deoxyribonucleases/metabolism; Endonucleases/isolation & purification; Endonucleases/metabolism; Enzyme Activation/drug effects; Enzyme Induction; Escherichia coli/enzymology; Hydrogen-Ion Concentration; Iron/pharmacology; Kinetics; Magnesium/pharmacology; Mutation; Species Specificity
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Annotations

Gene product	Qualifier	GO Term	Evidence Code	with/from	Aspect	Extension	Notes	Status
ECOLI:NFI	enables	GO:0043737: deoxyribonuclease V activity	ECO:0000314: direct assay evidence used in manual assertion		F		Seeded From UniProt	complete

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