Open AccessCloning and Expression of the BalI Restriction-modification System
Author(s) -
Hiroaki Ueno,
Itaru Kato,
Yoshizumi Ishino
Publication year - 1996
Publication title -
nucleic acids research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 9.008
H-Index - 537
eISSN - 1362-4954
pISSN - 0305-1048
DOI - 10.1093/nar/24.12.2268
Subject(s) - biology , restriction enzyme , dna methyltransferase , molecular cloning , microbiology and biotechnology , restriction map , endonuclease , escherichia coli , restriction fragment , genetics , methyltransferase , cloning (programming) , gene , dna , ecori , peptide sequence , recognition sequence , methylation , computer science , programming language
BalI, a type II restriction-modification (R-M) system from the bacterium, Brevibacterium albidum, recognizes the DNA sequence 5'-TGGCCA-3'. We cloned the genes encoding the BalI restriction endonuclease and methyltransferase and expressed them in Escherichia coli. The two genes were aligned tail-to-tail and their termination codons overlapped. BalI restriction endonuclease and methyltransferase comprise 260 and 280 amino acids, respectively, and have molecular weights of 29 043 and 31 999 Da. The amino acid sequence of BalI methyltransferase is similar to that of other m6A MTases, although it has been categorized as a m5C methyltransferase. A high expression system for the BalI restriction endonuclease was constructed in E. coli for the production of large quantities of enzyme.
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