Linked Life Data

3101738

Source:http://linkedlifedata.com/resource/pubmed/id/3101738

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1987-4-6
pubmed:abstractText
The different proteins present in chromatin of Escherichia coli have been analyzed by a variety of techniques. The chromatin was isolated using a previously published procedure (Sjåstad, K., Fadnes, P., Krüger, P.G. Lossius, I. and Kleppe, K. (1982) J. Gen. Microbiol. 128, 3037) and solubilized by the action of micrococcal nuclease or DNAase I. The DNA-protein and RNA-protein complexes thus obtained were purified by sucrose gradient centrifugation and isopycnic gradient centrifugation in metrizamide in low ionic strength. The protein: DNA ratio of the DNA-protein complexes was estimated from the latter method and found to be approx. 1.75. The protein components were analyzed further by one- and two-dimensional gel electrophoresis. Approx. 15 major polypeptides were detected in the DNA-protein complex, whereas 10 were present in the RNA-protein complex. The majority of the polypeptides in both complexes had acidic isoelectric pH. The polypeptides in the two complexes differed markedly and only two polypeptides, having molecular weights of 57,000 and 37,000, respectively, were found to be common in both complexes. In agreement with earlier studies, the basic protein HU was not present in the DNA-protein complex. Affinity studies of the proteins from chromatin using DNA- and RNA-Sepharose columns in general confirmed the above conclusions. The two-dimensional gel electrophoretic patterns of the proteins in the different complexes were compared with those of proteins in the inner and outer membranes. Only one of the major polypeptides present in the inner membrane, having a molecular weight of 57,000, was enriched in the DNA-protein complex.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
908
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
188-99
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
DNA- and RNA-binding proteins of chromatin from Escherichia coli.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't