This view shows enzymes only for those organisms listed below, in the list of taxa known to possess the pathway. If an enzyme name is shown in bold, there is experimental evidence for this enzymatic activity.
|Superclasses:||Biosynthesis → Cofactors, Prosthetic Groups, Electron Carriers Biosynthesis → Polyprenyl Biosynthesis|
Some taxa known to possess this pathway include : Aeromonas hydrophila, Arthrobacter nicotianae, Arthrobacter ureafaciens, Azotobacter vinelandii, Bordetella pertussis, Brevibacterium iodinum, Brevibacterium linens, Brevibacterium sterolicum, Corynebacterium diphtheriae, Corynebacterium flavescens, Corynebacterium kutscheri, Corynebacterium pseudotuberculosis, Corynebacterium renale, Corynebacterium ulcerans, Corynebacterium xerosis, Cupriavidus necator, Deinococcus radiodurans, Ectothiorhodospira haloalkaliphila, Enterobacter aerogenes, Escherichia coli K-12 substr. MG1655, Halobacterium salinarum, Halobacterium sp. NCIMB 763, Halococcus morrhuae, Haloferax volcanii, Halorubrum saccharovorum, Halorubrum trapanicum, Lactobacillus mali, Micrococcus luteus, Nocardia asteroides, Nocardia brasiliensis, Nocardia farcinica, Nocardia transvalensis, Nocardia vaccinii, Pimelobacter simplex, Proteus mirabilis, Proteus vulgaris, Rhodococcus corynebacterioides, Rhodococcus equi, Rhodococcus erythropolis, Rhodococcus fascians, Rhodococcus rhodnii, Rhodococcus rhodochrous, Rhodococcus ruber, Rubrivivax gelatinosus, Salinivibrio costicola, Serratia marcescens, Staphylococcus aureus, Stenotrophomonas maltophilia, Streptomyces gardneri, Thermus aquaticus, Thermus thermophilus, Virgibacillus pantothenticus, Xanthomonas campestris, Xanthomonas citri, Xanthomonas oryzae, Yersinia pseudotuberculosis
In this pathway multiple units of isopentenyl diphosphate (IPP) undergo a series of polymerizations to form a polyisoprenoid chain.
Additional isoprenoid units are added to a maximal length that is determined by the specific enzyme. Most organisms generate polyprenyl chains of predominantly one length. Once completed, the polyprenyl chain is incorporated into other molecules, such as quinones. The enzyme that attaches the polyprenyl chain to the quinone precursor molecule does not have a preference towards a particular length. Thus, the length of the polyprenyl chain in the mature quinone molecule is determined by the predominant polyprenyl diphosphate synthase enzyme of the organism.
In most organisms there is one type of a predominant quinone, with a specific polyprenyl chain length. However, most organisms also have minor amounts of quinones with a different polyprenyl chain length. Quinones containing chains of 8 prenyl units are found in all kingdoms of life. They are particularly common among the Archaea (in the form of menaquinone-8) and the Enterobacteriaceae. For a review detailing the distribution of polyprenyl chain length in different bacteria, see [Collins81].
In Escherichia coli K-12 the initial addition of two isoprenyl units to form (2E,6E)-farnesyl diphosphate is catalyzed by geranyl diphosphate synthase / farnesyl diphosphate synthase, encoded by ispA. Additional isoprenoid units are added sequentially to a maximal length of 8 units by octaprenyl diphosphate synthase, encoded by ispB.
Superpathways: superpathway of menaquinol-8 biosynthesis I, superpathway of demethylmenaquinol-8 biosynthesis, superpathway of ubiquinol-8 biosynthesis (prokaryotic), superpathway of menaquinol-8 biosynthesis II, polyisoprenoid biosynthesis (E. coli), superpathway of chorismate metabolism
Unification Links: EcoCyc:PWY-5783
Asai94: Asai K, Fujisaki S, Nishimura Y, Nishino T, Okada K, Nakagawa T, Kawamukai M, Matsuda H (1994). "The identification of Escherichia coli ispB (cel) gene encoding the octaprenyl diphosphate synthase." Biochem Biophys Res Commun 202(1);340-5. PMID: 8037730
Baba06: Baba T, Ara T, Hasegawa M, Takai Y, Okumura Y, Baba M, Datsenko KA, Tomita M, Wanner BL, Mori H (2006). "Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants: the Keio collection." Mol Syst Biol 2;2006.0008. PMID: 16738554
Chang12: Chang KM, Chen SH, Kuo CJ, Chang CK, Guo RT, Yang JM, Liang PH (2012). "Roles of amino acids in the Escherichia coli octaprenyl diphosphate synthase active site probed by structure-guided site-directed mutagenesis." Biochemistry 51(16);3412-9. PMID: 22471615
Choi09: Choi JH, Ryu YW, Park YC, Seo JH (2009). "Synergistic effects of chromosomal ispB deletion and dxs overexpression on coenzyme Q(10) production in recombinant Escherichia coli expressing Agrobacterium tumefaciens dps gene." J Biotechnol 144(1);64-9. PMID: 19409940
Cui10: Cui TZ, Kaino T, Kawamukai M (2010). "A subunit of decaprenyl diphosphate synthase stabilizes octaprenyl diphosphate synthase in Escherichia coli by forming a high-molecular weight complex." FEBS Lett 584(4);652-6. PMID: 20051244
DiazMejia09: Diaz-Mejia JJ, Babu M, Emili A (2009). "Computational and experimental approaches to chart the Escherichia coli cell-envelope-associated proteome and interactome." FEMS Microbiol Rev 33(1);66-97. PMID: 19054114
Fujisaki86: Fujisaki S, Nishino T, Katsuki H (1986). "Isoprenoid synthesis in Escherichia coli. Separation and partial purification of four enzymes involved in the synthesis." J Biochem (Tokyo) 1986;99(5);1327-37. PMID: 3519603
Jeong93: Jeong JH, Kitakawa M, Isono S, Isono K (1993). "Cloning and nucleotide sequencing of the genes, rpIU and rpmA, for ribosomal proteins L21 and L27 of Escherichia coli." DNA Seq 4(1);59-67. PMID: 8312607
Kainou01: Kainou T, Okada K, Suzuki K, Nakagawa T, Matsuda H, Kawamukai M (2001). "Dimer formation of octaprenyl-diphosphate synthase (IspB) is essential for chain length determination of ubiquinone." J Biol Chem 276(11);7876-83. PMID: 11108713
Li13b: Li X, Han X, Ko TP, Chen CC, Zhu Z, Hua E, Guo RT, Huang CH (2013). "Preliminary X-ray diffraction analysis of octaprenyl pyrophosphate synthase from Escherichia coli." Acta Crystallogr Sect F Struct Biol Cryst Commun 69(Pt 3);328-31. PMID: 23519815
Okada97a: Okada K, Minehira M, Zhu X, Suzuki K, Nakagawa T, Matsuda H, Kawamukai M (1997). "The ispB gene encoding octaprenyl diphosphate synthase is essential for growth of Escherichia coli." J Bacteriol 179(9);3058-60. PMID: 9139929
Pan02: Pan JJ, Kuo TH, Chen YK, Yang LW, Liang PH (2002). "Insight into the activation mechanism of Escherichia coli octaprenyl pyrophosphate synthase derived from pre-steady-state kinetic analysis." Biochim Biophys Acta 1594(1);64-73. PMID: 11825609
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