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. 1994 Jun 24;144(1):97-101.
doi: 10.1016/0378-1119(94)90210-0.

Characterization of two groEL genes in Streptomyces coelicolor A3(2)

A M Duchêne  1 , H M Kieser, D A Hopwood, C J Thompson, P Mazodier
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Characterization of two groEL genes in Streptomyces coelicolor A3(2)

A M Duchêne et al. Gene. .

Abstract

Two Streptomyces coelicolor A3(2) groEL-like genes, groEL1 and groEL2, were cloned and characterized. Pulsed-field-gel electrophoresis located these genes, which were not adjacent, in the same segment of the chromosome. Nucleotide sequence analysis revealed that groEL1, but not groEL2, was preceded by a groES-like gene. Northern blots showed that heat shock induced the accumulation of transcripts corresponding to groES (0.7 kb), groES/EL1 (2.3 kb) and groEL2 (2.1 kb). Unique transcription start points and promoters were located for groES/EL1 and groEL2, having -10 and -35 hexamers similar to eubacterial vegetative promoters. Regions located 5' to the groES/EL1 or groEL2 structural genes contain 'GCACTCN9GAGTGC' motifs conserved upstream from the heat-shock genes of other bacteria.

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