Network Analysis for Prioritizing Biodegradation Metabolites of Polycyclic Aromatic HydrocarbonsClick to copy article linkArticle link copied!
- Trevor W. SleightTrevor W. SleightDepartment of Civil and Environmental Engineering, University of Pittsburgh, Benedum Hall, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United StatesMore by Trevor W. Sleight
- Vikas KhannaVikas KhannaDepartment of Civil and Environmental Engineering, University of Pittsburgh, Benedum Hall, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United StatesSecondary Appointment, Department of Chemical and Petroleum Engineering, University of Pittsburgh, Benedum Hall, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United StatesMore by Vikas Khanna
- Leanne M. Gilbertson*Leanne M. Gilbertson*Email: [email protected]Department of Civil and Environmental Engineering, University of Pittsburgh, Benedum Hall, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United StatesSecondary Appointment, Department of Chemical and Petroleum Engineering, University of Pittsburgh, Benedum Hall, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United StatesMore by Leanne M. Gilbertson
- Carla A. Ng*Carla A. Ng*Email: [email protected]Department of Civil and Environmental Engineering, University of Pittsburgh, Benedum Hall, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United StatesSecondary Appointment, Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, Pittsburgh, Pennsylvania 15261, United StatesMore by Carla A. Ng
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are a diverse group of environmental contaminants released during the combustion of organic materials and the production and utilization of fossil fuels. Once released, PAHs deposit in soil and water bodies where they are subjected to environmental transport and transformations. As they degrade, intermediate transformation products may play an important role in their environmental impact. However, studying the effects of these degradation products has proven challenging because of the complexity, transience, and low concentration of many intermediates. Herein, a novel integration of a pathway prediction system and network theory was developed and applied to a set of four PAHs to demonstrate a possible solution to this challenge. Network analysis techniques were employed to refine the thousands of potential outputs and elucidate compounds of interest. Using these tools, we determined correlations between PAH degradation network data and intermediate metabolite structures, gaining information about the chemical characteristics of compounds based on their placement within the degradation network. Upon applying our developed filtering algorithm, we are able to predict up to 48% of the most common transformation products identified in a comprehensive empirical literature review. Additionally, our integrated approach uncovers potential metabolites which connect those found by past empirical studies but are currently undetected, thereby filling in the gaps of information in PAH degradation pathways.
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