Loading Pathway...
Error: Pathway image not found.
Hide
Pathway Description
Isoleucine Biosynthesis
Saccharomyces cerevisiae
Category:
Metabolite Pathway
Sub-Category:
Metabolic
Created: 2016-02-19
Last Updated: 2019-08-14
Isoleucine biosynthesis begins with L-threonine from the threonine biosynthesis pathway. L-threonine interacts with a threonine dehydratase biosynthetic releasing water, a hydrogen ion and (2Z)-2-aminobut-2-enoate. This compound is isomerized into a 2-iminobutanoate which interacts with water and a hydrogen ion spontaneously, resulting in the release of ammonium and 2-ketobutyric acid. This compound reacts with pyruvic acid and hydrogen ion through an acetohydroxybutanoate synthase / acetolactate synthase 2 resulting in carbon dioxide and (S)-2-Aceto-2-hydroxybutanoic acid. The latter compound is reduced by an NADPH driven acetohydroxy acid isomeroreductase releasing NADP and acetohydroxy acid isomeroreductase. The latter compound is dehydrated by a dihydroxy acid dehydratase resulting in 3-methyl-2-oxovaleric acid.This compound reacts in a reversible reaction with L-glutamic acid through a Branched-chain-amino-acid aminotransferase resulting in oxoglutaric acid and L-isoleucine.
References
Isoleucine Biosynthesis References
Andreadis A, Hsu YP, Hermodson M, Kohlhaw G, Schimmel P: Yeast LEU2. Repression of mRNA levels by leucine and primary structure of the gene product. J Biol Chem. 1984 Jul 10;259(13):8059-62.
Pubmed: 6330094
Branduardi P, Longo V, Berterame NM, Rossi G, Porro D: A novel pathway to produce butanol and isobutanol in Saccharomyces cerevisiae. Biotechnol Biofuels. 2013 May 4;6(1):68. doi: 10.1186/1754-6834-6-68.
Pubmed: 23642236
Storms RK, Holowachuck EW, Friesen JD: Genetic complementation of the Saccharomyces cerevisiae leu2 gene by the Escherichia coli leuB gene. Mol Cell Biol. 1981 Sep;1(9):836-42.
Pubmed: 9279396
Tzermia M, Horaitis O, Alexandraki D: The complete sequencing of a 24.6 kb segment of yeast chromosome XI identified the known loci URA1, SAC1 and TRP3, and revealed 6 new open reading frames including homologues to the threonine dehydratases, membrane transporters, hydantoinases and the phospholipase A2-activating protein. Yeast. 1994 May;10(5):663-79. doi: 10.1002/yea.320100511.
Pubmed: 7941750
Dujon B, Alexandraki D, Andre B, Ansorge W, Baladron V, Ballesta JP, Banrevi A, Bolle PA, Bolotin-Fukuhara M, Bossier P, Bou G, Boyer J, Bultrago MJ, Cheret G, Colleaux L, Dalgnan-Fornler B, del Rey F, Dlon C, Domdey H, Dusterhoft A, Dusterhus S, Entlan KD, Erfle H, Esteban PF, Feldmann H, Fernandes L, Robo GM, Fritz C, Fukuhara H, Gabel C, Gaillon L, Carcia-Cantalejo JM, Garcia-Ramirez JJ, Gent NE, Ghazvini M, Goffeau A, Gonzalez A, Grothues D, Guerreiro P, Hegemann J, Hewitt N, Hilger F, Hollenberg CP, Horaitis O, Indge KJ, Jacquier A, James CM, Jauniaux C, Jimenez A, Keuchel H, Kirchrath L, Kleine K, Kotter P, Legrain P, Liebl S, Louis EJ, Maia e Silva A, Marck C, Monnier AL, Mostl D, Muller S, Obermaier B, Oliver SG, Pallier C, Pascolo S, Pfeiffer F, Philippsen P, Planta RJ, Pohl FM, Pohl TM, Pohlmann R, Portetelle D, Purnelle B, Puzos V, Ramezani Rad M, Rasmussen SW, Remacha M, Revuelta JL, Richard GF, Rieger M, Rodrigues-Pousada C, Rose M, Rupp T, Santos MA, Schwager C, Sensen C, Skala J, Soares H, Sor F, Stegemann J, Tettelin H, Thierry A, Tzermia M, Urrestarazu LA, van Dyck L, Van Vliet-Reedijk JC, Valens M, Vandenbo M, Vilela C, Vissers S, von Wettstein D, Voss H, Wiemann S, Xu G, Zimmermann J, Haasemann M, Becker I, Mewes HW: Complete DNA sequence of yeast chromosome XI. Nature. 1994 Jun 2;369(6479):371-8. doi: 10.1038/369371a0.
Pubmed: 8196765
Engel SR, Dietrich FS, Fisk DG, Binkley G, Balakrishnan R, Costanzo MC, Dwight SS, Hitz BC, Karra K, Nash RS, Weng S, Wong ED, Lloyd P, Skrzypek MS, Miyasato SR, Simison M, Cherry JM: The reference genome sequence of Saccharomyces cerevisiae: then and now. G3 (Bethesda). 2014 Mar 20;4(3):389-98. doi: 10.1534/g3.113.008995.
Pubmed: 24374639
Dietrich FS, Mulligan J, Hennessy K, Yelton MA, Allen E, Araujo R, Aviles E, Berno A, Brennan T, Carpenter J, Chen E, Cherry JM, Chung E, Duncan M, Guzman E, Hartzell G, Hunicke-Smith S, Hyman RW, Kayser A, Komp C, Lashkari D, Lew H, Lin D, Mosedale D, Davis RW, et al.: The nucleotide sequence of Saccharomyces cerevisiae chromosome V. Nature. 1997 May 29;387(6632 Suppl):78-81.
Pubmed: 9169868
Huh WK, Falvo JV, Gerke LC, Carroll AS, Howson RW, Weissman JS, O'Shea EK: Global analysis of protein localization in budding yeast. Nature. 2003 Oct 16;425(6959):686-91. doi: 10.1038/nature02026.
Pubmed: 14562095
Hohmann S: Characterization of PDC6, a third structural gene for pyruvate decarboxylase in Saccharomyces cerevisiae. J Bacteriol. 1991 Dec;173(24):7963-9. doi: 10.1128/jb.173.24.7963-7969.1991.
Pubmed: 1744053
Tettelin H, Agostoni Carbone ML, Albermann K, Albers M, Arroyo J, Backes U, Barreiros T, Bertani I, Bjourson AJ, Bruckner M, Bruschi CV, Carignani G, Castagnoli L, Cerdan E, Clemente ML, Coblenz A, Coglievina M, Coissac E, Defoor E, Del Bino S, Delius H, Delneri D, de Wergifosse P, Dujon B, Kleine K, et al.: The nucleotide sequence of Saccharomyces cerevisiae chromosome VII. Nature. 1997 May 29;387(6632 Suppl):81-4.
Pubmed: 9169869
Highlighted elements will appear in red.
Highlight Compounds
Highlight Proteins
Enter relative concentration values (without units). Elements will be highlighted in a color gradient where red = lowest concentration and green = highest concentration. For the best results, view the pathway in Black and White.
Visualize Compound Data
Visualize Protein Data
Settings