Print Email Facebook Twitter Metabolic modeling of denitrification in Agrobacterium tumefaciens: A tool to study inhibiting and activating compounds for the denitrification pathway Title Metabolic modeling of denitrification in Agrobacterium tumefaciens: A tool to study inhibiting and activating compounds for the denitrification pathway Author Kampschreur, M.J. Kleerebezem, R. Picioreanu, C. Bakken, L. Bergaust, L. De Vries, S. Jetten, M.S.M. Van Loosdrecht, M.C.M. Faculty Applied Sciences Department BT/Biotechnology Date 2012-10-18 Abstract A metabolic network model for facultative denitrification was developed based on experimental data obtained with Agrobacterium tumefaciens. The model includes kinetic regulation at the enzyme level and transcription regulation at the enzyme synthesis level. The objective of this work was to study the key factors regulating the metabolic response of the denitrification pathway to transition from oxic to anoxic respiration and to find parameter values for the biological processes that were modeled. The metabolic model was used to test hypotheses that were formulated based on the experimental results and offers a structured look on the processes that occur in the cell during transition in respiration. The main phenomena that were modeled are the inhibition of the cytochrome c oxidase by nitric oxide (NO) and the (indirect) inhibition of oxygen on the denitrification enzymes. The activation of transcription of nitrite reductase and NO reductase by their respective substrates were hypothesized. The general assumption that nitrite and NO reduction are controlled interdependently to prevent NO accumulation does not hold for A. tumefaciens. The metabolic network model was demonstrated to be a useful tool for unraveling the different factors involved in the complex response of A. tumefaciens to highly dynamic environmental conditions. Subject agrobacterium tumefaciensdenitrificationmetabolic modelnitric oxidenitrite reductionnitrous oxideNO reduction To reference this document use: http://resolver.tudelft.nl/uuid:7b91aebb-08ee-4fb6-a292-f139ff502638 DOI https://doi.org/10.3389/fmicb.2012.00370 Publisher Frontiers Research Foundation ISSN 1664-302X Source Frontiers in Microbiology, 3, 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 The Author(s)This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. Files PDF Kleerebezem_2012.pdf 3.03 MB Close viewer /islandora/object/uuid:7b91aebb-08ee-4fb6-a292-f139ff502638/datastream/OBJ/view