The Organophosphate Degradation (opd) Island-borne Esterase-induced Metabolic Diversion in Escherichia coli and Its Influence on p-Nitrophenol Degradation
| Autor: | Emmanuel Vijay Paul Pandeeti, Ashok Kumar Madikonda, Ramurthy Gudla, Deviprasanna Chakka, Aparna Nandavaram, Dayananda Siddavattam, Sunil Parthasarathy |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Glyoxylate cycle
Biology medicine.disease_cause Microbiology Biochemistry Esterase Nitrophenols Gene cluster Escherichia coli medicine Molecular Biology chemistry.chemical_classification Phenylpropionates Catabolism Esterases Cell Biology Carbon Organophosphates Up-Regulation Metabolic pathway Enzyme chemistry Genes Bacterial Propionate |
| Zdroj: | Journal of Biological Chemistry. 290:29920-29930 |
| ISSN: | 0021-9258 |
| Popis: | In previous studies of the organophosphate degradation gene cluster, we showed that expression of an open reading frame (orf306) present within the cluster in Escherichia coli allowed growth on p-nitrophenol (PNP) as sole carbon source. We have now shown that expression of orf306 in E. coli causes a dramatic up-regulation in genes coding for alternative carbon catabolism. The propionate, glyoxylate, and methylcitrate cycle pathway-specific enzymes are up-regulated along with hca (phenylpropionate) and mhp (hydroxyphenylpropionate) degradation operons. These hca and mhp operons play a key role in degradation of PNP, enabling E. coli to grow using it as sole carbon source. Supporting growth experiments, PNP degradation products entered central metabolic pathways and were incorporated into the carbon backbone. The protein and RNA samples isolated from E. coli (pSDP10) cells grown in (14)C-labeled PNP indicated incorporation of (14)C carbon, suggesting Orf306-dependent assimilation of PNP in E. coli cells. |
| Databáze: | OpenAIRE |
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