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Isolation and properties of minB, a complex genetic locus involved in correct placement of the division site in Escherichia coli


de Boer, P A; Crossley, R E; Rothfield, L I (1988). Isolation and properties of minB, a complex genetic locus involved in correct placement of the division site in Escherichia coli. Journal of Bacteriology, 170(5):2106-2112.

Abstract

Mutation of Escherichia coli minicell locus (minB) results in aberrant placement of the division septum. In this paper we report the isolation and characterization of the minB locus. Replacement of the chromosomal minB+ allele by cloned minB sequences containing transposon insertions resulted in the minicell phenotype, indicating that minB+ function is required to maintain the normal division pattern. Paradoxically, overexpression of the locus also resulted in the minicell phenotype. The locus codes for several peptides whose expression is coordinately affected by transposon mutations that also eliminate minB+ function. A subset of the minB peptides is sufficient to prevent minicell formation in minB1 mutants or to induce minicell formation when overproduced in wild-type strains, implicating these peptides in the normal process of localization of the division site. The results indicate that minB is a complex locus whose expression must be maintained within certain limits to maintain the normal pattern of localization of the division septum.

Abstract

Mutation of Escherichia coli minicell locus (minB) results in aberrant placement of the division septum. In this paper we report the isolation and characterization of the minB locus. Replacement of the chromosomal minB+ allele by cloned minB sequences containing transposon insertions resulted in the minicell phenotype, indicating that minB+ function is required to maintain the normal division pattern. Paradoxically, overexpression of the locus also resulted in the minicell phenotype. The locus codes for several peptides whose expression is coordinately affected by transposon mutations that also eliminate minB+ function. A subset of the minB peptides is sufficient to prevent minicell formation in minB1 mutants or to induce minicell formation when overproduced in wild-type strains, implicating these peptides in the normal process of localization of the division site. The results indicate that minB is a complex locus whose expression must be maintained within certain limits to maintain the normal pattern of localization of the division septum.

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Additional indexing

Item Type:Journal Article, refereed, further contribution
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Pneumology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:May 1988
Deposited On:14 Feb 2018 17:04
Last Modified:01 Mar 2018 01:57
Publisher:American Society for Microbiology
ISSN:0021-9193
OA Status:Hybrid
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1128/jb.170.5.2106-2112.1988
PubMed ID:2834323

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