title: [A system of EcoRV restriction-modification: genes, enzymes and synthetic substrates].
abstract: The genes, encoding the restriction endonuclease and modification methylase EcoRV have been cloned from the natural plasmid pLG13 into pBR32 derivative vector pIL233. A resultant clone, expressing both enzyme activities, was used as a source of DNA for sequencing these genes by a procedure, that employed construction of deletion derivatives used to locate borders (by means of a functional test) and to sequence ca. 300 bp near the deletion breakpoint. From the sequence data, we infer that the endonuclease, a 29 KDa protein, and the methylase, a 36 KDa protein, are transcribed from a 310 bp intergenic region in opposite directions. There is no apparent homology between the enzymes and genes of the EcoRI and the EcoRV systems. A synthetic decamer, containing the EcoRV endonuclease recognition sequence and a phosphoamide bond at the cleavage point, is not cleaved by the highly purified endonuclease; the unmodified synthetic decamer is cleaved at the same conditions, only that the cleavage occurs to produce a blunt end--GAT/ATC, and not in a place previously reported (GATAT/C).
authors.forename: A S
authors.initials: AS
authors.lastname: Kraev
authors.forename: A N
authors.initials: AN
authors.lastname: Kravets
authors.forename: B K
authors.initials: BK
authors.lastname: Chernov
authors.forename: K G
authors.initials: KG
authors.lastname: Skriabin
authors.forename: A A
authors.initials: AA
authors.lastname: Baev
mesh_terms: D001483:Base Sequence; D002851:Chromatography, High Pressure Liquid; D002872:Chromosome Deletion; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes / Q000235:genetics*; D004269:DNA, Bacterial / Q000235:genetics*; D015252:Deoxyribonucleases, Type II Site-Specific; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D005796:Genes; D005798:Genes, Bacterial; D010957:Plasmids; D013379:Substrate Specificity
chemical_list: D004269:DNA, Bacterial; D004262:DNA Restriction Enzymes; D015252:Deoxyribonucleases, Type II Site-Specific; C027440:GATATC-specific type II deoxyribonucleases
vernacular_title: Sistema restriktsii-modifikatsii EcoRV: geny, fermenty, sinteticheskie substraty.