Linked Life Data

2183010

Source:http://linkedlifedata.com/resource/pubmed/id/2183010

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1990-5-23
pubmed:abstractText
Nucleoid segregation in the Escherichia coli minB mutant and in cells that over-produce minB gene products appeared defective as measured from fluorescence micrographs. Electrophoretic resolution of topoisomers of plasmid isolates from the minB strain revealed a decreased level of negative supercoiling; in addition, multimerization was observed. Over-production of the minB gene product also resulted in a decreased level of negative supercoiling. This phenotype is typical of the gyrB(ts) mutant, which is known to be affected in chromosome decatenation and supercoiling. We propose that the minB mutation and over-production of the minB gene products cause a defect in nucleoid segregation, which may be related to the decrease in negative supercoiling. As in the gyrB(ts) mutant, retardation of nucleoid segregation is proposed to inhibit constriction initiation in the cell centre and to give rise to nucleoid-free cell poles. As a consequence, these cells divide between nucleoid and cell pole, resulting in minicell and (sometimes) in anucleate cell formation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0026-8925
pubmed:author
pubmed:issnType
Print
pubmed:volume
221
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
87-93
pubmed:dateRevised
2006-5-1
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
The Escherichia coli minB mutation resembles gyrB in defective nucleoid segregation and decreased negative supercoiling of plasmids.
pubmed:affiliation
Department of Molecular Cell Biology, University of Amsterdam, The Netherlands.
pubmed:publicationType
Journal Article