Four new type I restriction enzymes identified in Escherichia coli clinical isolates

Using a plasmid transformation method and the RM search computer program, four type I restriction enzymes with new recognition sites and two isoschizomers (EcoBI and Eco377I) were identified in a collection of clinical Escherichia coli isolates. These new enzymes were designated Eco394I, Eco826I, Ec...

Descripción completa

Detalles Bibliográficos
Autores principales: Kasarjian, Julie K. A., Kodama, Yoshiaki, Iida, Masatake, Matsuda, Katsura, Ryu, Junichi
Formato: Texto
Lenguaje:English
Publicado: Oxford University Press 2005
Materias:
Methods Online
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1178010/
https://www.ncbi.nlm.nih.gov/pubmed/16040596
http://dx.doi.org/10.1093/nar/gni114
Descripción
Sumario:Using a plasmid transformation method and the RM search computer program, four type I restriction enzymes with new recognition sites and two isoschizomers (EcoBI and Eco377I) were identified in a collection of clinical Escherichia coli isolates. These new enzymes were designated Eco394I, Eco826I, Eco851I and Eco912I. Their recognition sequences were determined to be GAC(5N)RTAAY, GCA(6N)CTGA, GTCA(6N)TGAY and CAC(5N)TGGC, respectively. A methylation sensitivity assay, using various synthetic oligonucleotides, was used to identify the adenines that prevent cleavage when methylated (underlined). These results suggest that type I enzymes are abundant in E.coli and many other bacteria, as has been inferred from bacterial genome sequencing projects.

Ejemplares similares