Artikel ; Online: Evolution of a xenobiotic degradation pathway: formation and capture of the labile phthaloyl-CoA intermediate during anaerobic phthalate degradation.
2018 Band 108, Heft 6, Seite(n) 614–626
Abstract: Xenobiotic phthalates are industrially produced on the annual million ton scale. The oxygen-independent enzymatic reactions involved in anaerobic phthalate degradation have only recently been elucidated. In vitro assays suggested that phthalate is first ... ...
Abstract | Xenobiotic phthalates are industrially produced on the annual million ton scale. The oxygen-independent enzymatic reactions involved in anaerobic phthalate degradation have only recently been elucidated. In vitro assays suggested that phthalate is first activated to phthaloyl-CoA followed by decarboxylation to benzoyl-CoA. Here, we report the heterologous production and characterization of the enzyme initiating anaerobic phthalate degradation from 'Aromatoleum aromaticum': a highly specific succinyl-CoA:phthalate CoA transferase (SPT, class III CoA transferase). Phthaloyl-CoA formed by SPT accumulated only to sub-micromolar concentrations due to the extreme lability of the product towards intramolecular substitution with a half-life of around 7 min. Upon addition of excess phthaloyl-CoA decarboxylase (PCD), the combined activity of both enzymes was drastically shifted towards physiologically relevant benzoyl-CoA formation. In conclusion, a massive overproduction of PCD in phthalate-grown cells to concentrations >140 μM was observed that allowed for efficient phthaloyl-CoA conversion at concentrations 250-fold below the apparent K |
---|---|
Mesh-Begriff(e) | Anaerobiosis ; Bacterial Proteins/genetics ; Bacterial Proteins/metabolism ; Carboxy-Lyases/genetics ; Carboxy-Lyases/metabolism ; Coenzyme A/metabolism ; Kinetics ; Phthalic Acids/chemistry ; Phthalic Acids/metabolism ; Phylogeny ; Rhodocyclaceae/classification ; Rhodocyclaceae/enzymology ; Rhodocyclaceae/genetics ; Rhodocyclaceae/metabolism ; Xenobiotics/metabolism |
Chemische Substanzen | Bacterial Proteins ; Phthalic Acids ; Xenobiotics ; phthalic acid (6O7F7IX66E) ; Carboxy-Lyases (EC 4.1.1.-) ; Coenzyme A (SAA04E81UX) |
Sprache | Englisch |
Erscheinungsdatum | 2018-04-26 |
Erscheinungsland | England |
Dokumenttyp | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 619315-8 |
ISSN | 1365-2958 ; 0950-382X |
ISSN (online) | 1365-2958 |
ISSN | 0950-382X |
DOI | 10.1111/mmi.13962 |
Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
Volltext online
Zusatzmaterialien
Kategorien
Verfügbar in ZB MED Köln/Königswinter
Zs.A 2502: Hefte anzeigen | Standort: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG) |
Über subito bestellen
Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.