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. 1991 May;173(9):2944-53.
doi: 10.1128/jb.173.9.2944-2953.1991.

Isolation, characterization, and sequence of an Escherichia coli heat shock gene, htpX

D Kornitzer  1 , D Teff, S Altuvia, A B Oppenheim
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Isolation, characterization, and sequence of an Escherichia coli heat shock gene, htpX

D Kornitzer et al. J Bacteriol. 1991 May.

Abstract

We isolated and characterized a new Escherichia coli gene, htpX. The htpX gene has been localized at min 40.3 on the chromosome. We determined its transcription and translation start site. htpX expresses a 32-kDa protein from a monocistronic transcript; expression of this protein is induced by temperature upshift. htpX is expressed from a sigma 32-dependent promoter and is thus part of the heat shock regulon. Cells carrying a htpX gene disruption grow well at all temperatures and under all conditions tested and have no apparent phenotype. However, cells which overexpress a truncated form of the protein display a higher rate of degradation of puromycyl peptides.

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