Cloning and heterologous expression of the entire gene clusters for PD 116740 from Streptomyces strain WP 4669 and tetrangulol and tetrangomycin from Streptomyces rimosus NRRL 3016.

Abstract:

:The genes for the complete pathways for two polycyclic aromatic polyketides of the angucyclinone class have been cloned and heterologously expressed. Genomic DNAs of Streptomyces rimosus NRRL 3016 and Streptomyces strain WP 4669 were partially digested with MboI, and libraries (ca. 40-kb fragments) in Escherichia coli XL1-Blue MR were prepared with the cosmid vector pOJ446. Hybridization with the actI probe from the actinorhodin polyketide synthase genes identified two clusters of polyketide genes from each organism. After transfer of the four clusters to Streptomyces lividans TK24, expression of one cluster from each organism was established through the identification of pathway-specific products by high-performance liquid chromatography with photodiode array detection. Peaks were identified from the S. rimosus cluster (pksRIM-1) for tetrangulol, tetrangomycin, and fridamycin E. Peaks were identified from the WP 4669 cluster (pksWP-2) for tetrangulol, 19-hydroxytetrangulol, 8-O-methyltetrangulol, 19-hydroxy-8-O-methyltetrangulol, and PD 116740. Structures were confirmed by 1H nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry.

journal_name

J Bacteriol

journal_title

Journal of bacteriology

authors

Hong ST,Carney JR,Gould SJ

doi

10.1128/jb.179.2.470-476.1997

subject

Has Abstract

pub_date

1997-01-01 00:00:00

pages

470-6

issue

2

eissn

0021-9193

issn

1098-5530

journal_volume

179

pub_type

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