Abstract
A nucleotide sequence of 7 kb is reported, encompassing two bleomycin-resistance (BmR-encoding) genes and five other open reading frames (ORFs) from the Bm-producing organism Streptomyces verticillus ATCC 15003. The deduced ORFs, in sequence order, encode for (i) a protein homologous to an amino-acid dioxygenase; (ii) BlmA, the BmR-binding protein described by Sugiyama et al. [Gene 151 (1994) 11–16]; (iii) a product containing three copies of a sequence homologous to the ankyrin repeat; (iv) a product lacking homology to any of the sequences in the Protein Identification Resource database (PIR), release 37; (v) BlmB, the BmR acetyltransferase described by Sugiyama et al. (1994); (vi) an unidentified protein which augmented resistance determined by ORF2 (BlmA); (vii) a member of the ATP-binding cassette (ABC) family of transport proteins. Predicted translational frameshifts in the — 1 frame occur at the junctions between ORF3 and ORF4, ORF4 and ORF5, and ORF6 and ORF7. Sequences homologous to ORF2 and ORF3 were identified in the genome of the producer organism for the related antibiotic phleomycin.
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