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Title: Chemical-damage MINE: A database of curated and predicted spontaneous metabolic reactions

Journal Article · · Metabolic Engineering
 [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5];  [6];  [6];  [7];  [8];  [3]
  1. Argonne National Laboratory (ANL), Argonne, IL (United States)
  2. University of Chicago, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States); University of Chicago, IL (United States)
  4. N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg (Russia)
  5. University of Florida, Gainesville, FL (United States); University of Minnesota, Saint Paul, MN (United States)
  6. University of California, Davis, CA (United States)
  7. University of Florida, Gainesville, FL (United States)
  8. Northwestern University, Evanston, IL (United States)

Spontaneous reactions between metabolites are often neglected in favor of emphasizing enzyme-catalyzed chemistry because spontaneous reaction rates are assumed to be insignificant under physiological conditions. However, synthetic biology and engineering efforts can raise natural metabolites' levels or introduce unnatural ones, so that previously innocuous or nonexistent spontaneous reactions become an issue. Problems arise when spontaneous reaction rates exceed the capacity of a platform organism to dispose of toxic or chemically active reaction products. While various reliable sources list competing or toxic enzymatic pathways' side-reactions, no corresponding compilation of spontaneous side-reactions exists, nor is it possible to predict their occurrence. We addressed this deficiency by creating the Chemical Damage (CD)-MINE resource. First, we used literature data to construct a comprehensive database of metabolite reactions that occur spontaneously in physiological conditions. We then leveraged this data to construct 148 reaction rules describing the known spontaneous chemistry in a substrate-generic way. We applied these rules to all compounds in the ModelSEED database, predicting 180,891 spontaneous reactions. The resulting (CD)-MINE is available at https://minedatabase.mcs.anl. gov/cdmine/#/home and through developer tools. We also demonstrate how damage-prone intermediates and end products are widely distributed among metabolic pathways, and how predicting spontaneous chemical damage helps rationalize toxicity and carbon loss using examples from published pathways to commercial products. We explain how analyzing damage-prone areas in metabolism helps design effective engineering strategies. Finally, we use the CD-MINE toolset to predict the formation of the novel damage product N-carbamoyl proline, and present mass spectrometric evidence for its presence in Escherichia coli.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1991350
Journal Information:
Metabolic Engineering, Journal Name: Metabolic Engineering Vol. 69; ISSN 1096-7176
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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