Linked Life Data

2664457

Source:http://linkedlifedata.com/resource/pubmed/id/2664457

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2-3
pubmed:dateCreated
1989-8-25
pubmed:abstractText
The McrB restriction system in Escherichia coli K12 causes sequence-specific recognition and inactivation of DNA containing 5-methylcytosine residues. We have previously located the mcrB gene near hsdS at 99 min on the E. coli chromosome and demonstrated that it encodes a 51 kDa polypeptide required for restriction of M.AluI methylated (A-G-5mC-T) DNA. We show here, by analysis of maxicell protein synthesis of various cloned fragments from the mcrB region, that a second protein of approximately 39 kDa is also required for McrB-directed restriction. The new gene, designated mcrC, is adjacent to mcrB and located distally to hsdS. The McrB phenotype has been correlated previously with restriction of 5-hydroxy-methyl-cytosine (HMC)-containing T-even phage DNA that lacks the normal glucose modification of HMC, formally designated RglB (for restriction of glucoseless phage). This report reveals a difference between the previously correlated McrB and RglB restriction systems: while both require the mcrB gene product only the McrB system requires the newly identified mcrC-encoded 39-kDa polypeptide.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0026-8925
pubmed:author
pubmed:issnType
Print
pubmed:volume
216
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
402-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Identification of a second polypeptide required for McrB restriction of 5-methylcytosine-containing DNA in Escherichia coli K12.
pubmed:affiliation
Department of Microbiology, Louisiana State University, Baton Rouge 70803.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't