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Characterization of the ask–asd operon in aminoethoxyvinylglycine-producing Streptomyces sp. NRRL 5331

Characterization of the ask–asd operon in aminoethoxyvinylglycine-producing Streptomyces sp. NRRL... The first two genes of the threonine pathway, ask and asd, were cloned and sequenced from the aminoethoxyvinylglycine-producing Streptomyces sp. NRRL 5331. The two genes are organized in a bicistronic operon. ask, encoding the apartokinase (ASK), is located upstream from asd. The presence of a ribosome-binding site within the ask sequence suggests that this open reading frame encodes two overlapping proteins. The formation of both subunits of the aspartokinase from a single gene was studied using antibodies raised against the C-terminal end of the aspartokinase subunits. Disruption of asd results in a significant decrease of aminoethoxyvinylglycine production, thus supporting the involvement of the ask–asd operon in the biosynthesis of this metabolite. This is the first report in which a gene cluster for the first two steps of aminoethoxyvinylglycine biosynthesis is characterized. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Microbiology and Biotechnology Springer Journals

Characterization of the ask–asd operon in aminoethoxyvinylglycine-producing Streptomyces sp. NRRL 5331

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References (43)

Publisher
Springer Journals
Copyright
Copyright © 2003 by Springer-Verlag
Subject
LifeSciences
ISSN
0175-7598
eISSN
1432-0614
DOI
10.1007/s00253-003-1440-2
pmid
14556040
Publisher site
See Article on Publisher Site

Abstract

The first two genes of the threonine pathway, ask and asd, were cloned and sequenced from the aminoethoxyvinylglycine-producing Streptomyces sp. NRRL 5331. The two genes are organized in a bicistronic operon. ask, encoding the apartokinase (ASK), is located upstream from asd. The presence of a ribosome-binding site within the ask sequence suggests that this open reading frame encodes two overlapping proteins. The formation of both subunits of the aspartokinase from a single gene was studied using antibodies raised against the C-terminal end of the aspartokinase subunits. Disruption of asd results in a significant decrease of aminoethoxyvinylglycine production, thus supporting the involvement of the ask–asd operon in the biosynthesis of this metabolite. This is the first report in which a gene cluster for the first two steps of aminoethoxyvinylglycine biosynthesis is characterized.

Journal

Applied Microbiology and BiotechnologySpringer Journals

Published: Oct 11, 2003

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