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. 1987 Oct 12;15(19):7677–7687. doi: 10.1093/nar/15.19.7677

Alteration of the specificity of PvuII restriction endonuclease.

M Nasri 1, D Thomas 1
PMCID: PMC306300  PMID: 2823216

Abstract

The restriction endonuclease PvuII which cleaves the sequence CAGCTG, at the position indicated by the arrow, was found to decrease its substrate specificity in the presence of organic solvents. Thirty-three sites, that we have named PvuII sites, were identified on the nucleotide sequence of pBR322 DNA. The new recognition sequences cleaved in pBR322 DNA, at the positions indicated by the arrows, were shown to be AAGCTG, GAGCTG, CNGCTG, CANCTG, CAGNTG, CAGCNG, CAGCTC and CAGCTT. (TAGCTG and the complementary sequence CAGCTA are not present in pBR322 DNA). From these recognition sequences, we deduced that PvuII activity recognizes and cleaves degenerate sequences which differ from the standard PvuII sequence CAGCTG at only one of the recognition site. Any substitution can occur at any one of the six positions in the hexanucleotide sequence. The optimum incubation medium for PvuII activity was found to be: 10-50 mM Tris-HCl, pH 8.5, 12-15 mM MgCl2, 50 mM NaCl, 10% ethanol + 10% dimethylsulfoxide (DMSO).

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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