title: The role of modifications in oligonucleotides in sequence recognition by MvaI restriction endonuclease.
abstract: The interaction of MvaI restriction endonuclease with 14-membered deoxyribonucleotide duplexes containing modifications within the recognition site (CCA/TGG) has been studied. Substitution of m5dC for the internal dC residue, as well as substitution of fl5dU or rU for dT did not influence the initial rate of hydrolysis (v0) of modified strands, whereas the hydrolysis of unmodified strands was inhibited in some cases. Furthermore, the substitution of a pyrophosphate bond for a scissile phosphodiester bond in one strand completely inhibited digestion in this strand without any decrease of the rate of hydrolysis of the unmodified strand. In contrast to EcoRII endonuclease, which recognizes the same DNA sequence, in the case of MvaI endonuclease substrate recognition is possible in a wide range of conformational, electronic and hydrophobic alterations within the recognition site.
authors.affiliation: A.N. Belozersky Laboratory of Molecular Biology and Bioorganic Chemistry, Moscow State University, U.S.S.R.
authors.forename: E A
authors.initials: EA
authors.lastname: Kubareva
authors.forename: C D
authors.initials: CD
authors.lastname: Pein
authors.forename: E S
authors.initials: ES
authors.lastname: Gromova
authors.forename: S A
authors.initials: SA
authors.lastname: Kuznezova
authors.forename: V N
authors.initials: VN
authors.lastname: Tashlitzki
authors.forename: D
authors.initials: D
authors.lastname: Cech
authors.forename: Z A
authors.initials: ZA
authors.lastname: Shabarova
mesh_terms: D001482:Base Composition; D001483:Base Sequence; D001665:Binding Sites; D004262:DNA Restriction Enzymes / Q000378:metabolism*; D015252:Deoxyribonucleases, Type II Site-Specific; D006868:Hydrolysis; D008745:Methylation; D009690:Nucleic Acid Conformation; D009838:Oligodeoxyribonucleotides / Q000032:analysis*; D011485:Protein Binding; D013379:Substrate Specificity
chemical_list: D009838:Oligodeoxyribonucleotides; D004262:DNA Restriction Enzymes; C046545:CCWGG-specific type II deoxyribonucleases; D015252:Deoxyribonucleases, Type II Site-Specific