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J Bacteriol. 1991 Nov;173(22):7382-6.

Characterization of the groEL-like genes in Streptomyces albus.

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Unité de Génie Microbiologique, Institut Pasteur, Paris, France.


Three GroEL-like heat shock proteins (HSP56, HSP58, and HSP18) have been observed in Streptomyces albus (G. Guglielmi, P. Mazodier, C. J. Thompson, and J. Davies, J. Bacteriol. 173:7374-7381, 1991). Here we report the cloning and complete nucleotide sequence of groEL1, which encodes HSP18 and HSP58, and groEL2, which encodes HSP56. Both nucleotide sequences predicted proteins of 56,680 Da that were 70% identical. The 5' nucleotide sequence of groEL1 coded for a protein corresponding to HSP18 that may be a processed gene product. At least two groEL-like genes were present in all 12 Streptomyces species tested; they were not closely linked in the genome. groEL1, but not groEL2, was adjacent to a groES-like gene.

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