Back to Search
Start Over
A multifunctional polyketide–peptide synthetase essential for albicidin biosynthesis in Xanthomonas albilineans The GenBank accession number for the sequence determined in this work is AF239749
- Source :
- Microbiology. 147:631-642
- Publication Year :
- 2001
- Publisher :
- Microbiology Society, 2001.
-
Abstract
- Albicidins, a family of potent antibiotics and phytotoxins produced by the sugarcane leaf scald pathogen Xanthomonas albilineans, inhibit DNA replication in bacteria and plastids. A gene located by Tn5-tagging was confirmed by complementation to participate in albicidin biosynthesis. The gene (xabB) encodes a large protein (predicted M:(r) 525695), with a modular architecture indicative of a multifunctional polyketide synthase (PKS) linked to a non-ribosomal peptide synthetase (NRPS). At 4801 amino acids in length, XabB is the largest reported PKS-NRPS. Twelve catalytic domains in this multifunctional enzyme are arranged in the order N terminus-acyl-CoA ligase (AL)-acyl carrier protein (ACP)-beta-ketoacyl synthase (KS)-beta-ketoacyl reductase (KR)-ACP-ACP-KS-peptidyl carrier protein (PCP)-condensation (C)-adenylation-PCP-C. The modular architecture of XabB indicates likely steps in albicidin biosynthesis and approaches to enhance antibiotic yield. The novel pattern of domains, in comparison with known PKS-NRPS enzymes for antibiotic production, also contributes to the knowledge base for rational design of enzymes producing novel antibiotics.
Details
- ISSN :
- 14652080 and 13500872
- Volume :
- 147
- Database :
- OpenAIRE
- Journal :
- Microbiology
- Accession number :
- edsair.doi...........88f3354dc8ac774e2d1dc90e2a077d2d