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J. Bacteriol., 07 1997, 4446-4450, Vol 179, No. 13
Copyright © 1997, American Society for Microbiology

Cloning and characterization of the Streptomyces peucetius dnmZUV genes encoding three enzymes required for biosynthesis of the daunorubicin precursor thymidine diphospho-L-daunosamine

SL Otten, MA Gallo, K Madduri, X Liu and CR Hutchinson
School of Pharmacy, University of Wisconsin, Madison 53706, USA.

Characterization of the dnmZ, dnmU, and dnmV genes from the daunorubicin-producer Streptomyces peucetius by DNA sequence analysis indicated that these genes encode a protein of unknown function plus a putative thymidine diphospho-4-keto-6-deoxyglucose-3(5)-epimerase and thymidine diphospho-4-ketodeoxyhexulose reductase, respectively. Inactivation of each of the three genes by gene disruption and replacement in the wild-type strain demonstrated that all of them are required for daunosamine biosynthesis.


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