MOTIVATION: The metabolic models of both newly sequenced and well-studied organisms contain reactions for which the enzymes have not been identified yet. We present a computational approach for identifying genes encoding such missing metabolic enzymes in a partially reconstructed metabolic network. RESULTS: The metabolic expression placement (MEP) method relies on the coexpression properties of the metabolic network and is complementary to the sequence homology and genome context methods that are currently being used to identify missing metabolic genes. The MEP algorithm predicts over 20% of all known Saccharomyces cerevisiae metabolic enzyme-encoding genes within the top 50 out of 5594 candidates for their enzymatic function, and 70% of metabolic genes whose expression level has been significantly perturbed across the conditions of the expression dataset used. AVAILABILITY: Freely available (in Supplementary information).
MOTIVATION: The metabolic models of both newly sequenced and well-studied organisms contain reactions for which the enzymes have not been identified yet. We present a computational approach for identifying genes encoding such missing metabolic enzymes in a partially reconstructed metabolic network. RESULTS: The metabolic expression placement (MEP) method relies on the coexpression properties of the metabolic network and is complementary to the sequence homology and genome context methods that are currently being used to identify missing metabolic genes. The MEP algorithm predicts over 20% of all known Saccharomyces cerevisiae metabolic enzyme-encoding genes within the top 50 out of 5594 candidates for their enzymatic function, and 70% of metabolic genes whose expression level has been significantly perturbed across the conditions of the expression dataset used. AVAILABILITY: Freely available (in Supplementary information).
Authors: Jennifer L Reed; Trina R Patel; Keri H Chen; Andrew R Joyce; Margaret K Applebee; Christopher D Herring; Olivia T Bui; Eric M Knight; Stephen S Fong; Bernhard O Palsson Journal: Proc Natl Acad Sci U S A Date: 2006-11-06 Impact factor: 11.205
Authors: Tommi Aho; Henrikki Almusa; Jukka Matilainen; Antti Larjo; Pekka Ruusuvuori; Kaisa-Leena Aho; Thomas Wilhelm; Harri Lähdesmäki; Andreas Beyer; Manu Harju; Sharif Chowdhury; Kalle Leinonen; Christophe Roos; Olli Yli-Harja Journal: PLoS One Date: 2010-05-14 Impact factor: 3.240