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. 1979 Oct;140(1):50–58. doi: 10.1128/jb.140.1.50-58.1979

Deoxyribonucleic acid and outer membrane: strains diploid for the oriC region show elevated levels of deoxyribonucleic acid-binding protein and evidence for specific binding of the oriC region to outer membrane.

H Wolf-Watz, M Masters
PMCID: PMC216778  PMID: 227835

Abstract

We have recently reported that part of the chromosomal deoxyribonucleic acid (DNA) of Escherichia coli is associated with the outer membrane fraction and that an outer membrane protein having a molecular weight of 31,000 probably is involved in this association (H. Wolf-Watz and A. Norqvist, J. Bacteriol. 140:43-49, 1979). We have now found that F' merodiploid strains containing two copies of the DNA between bglB and ilv have increased levels of this protein and an increased amount of DNA in their outer membranes. Increased levels of the protein are also found when lambda asn phage, containing at 1.5-megadalton fragment of DNA located to the right of the uncA uncB genes but to the left of oriC, are induced. It therefore seems that this 1.5-megadalton fragment of DNA either codes for or binds to the 31,000-dalton outer membrane protein. Hybridization studies utilizing DNA found to be bound to outer membrane and DNA isolated from a specialized transducing phage lambda asn 132 revealed that at least 5 to 10% of outer membrane DNA has a DNA sequence homologous with a chromosomal segment carried by this oriC-containing phage.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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