Bioinformatics Vol. 19 Suppl. 2 2003
pages ii26-ii34
© 2003 Oxford University Press
Ab initio reconstruction of metabolic pathways
1 LSR-IMAG, 681, rue de la Passerelle, BP.
72, 38402 Saint Martin
dHères Cedex, France
2 INRIA
Rhône-Alpes, 655, avenue de
lEurope, Montbonnot, 38334 Saint Ismier Cedex, France
Received on March 17, 2003
; accepted on June 9, 2003
We propose a new formulation for the problem of ab initio metabolic pathway reconstruction. Given a set of biochemical reactions together with their substrates and products, we consider the reactions as transfers of atoms between the chemical compounds and we look for successions of reactions transferring a maximal (or preset) number of atoms between a given source and sink compound. We state this problem as the one of finding a composition of partial injections that maximizes the image size. First, we study the theoretical complexity of this problem, state some related problems and then give a practical algorithm to solve them. Finally, we present two applications of this approach to the reconstruction of the tryptophan biosynthesis pathway and to the glycolysis.
Contact: alain.viari{at}inrialpes.fr