All-trans-octaprenyl-diphosphate synthase

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All-trans-octaprenyl-diphosphate synthase
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EC no. 2.5.1.90
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All-trans-octaprenyl-diphosphate synthase (EC 2.5.1.90, octaprenyl-diphosphate synthase, octaprenyl pyrophosphate synthetase, polyprenylpyrophosphate synthetase, terpenoidallyltransferase, terpenyl pyrophosphate synthetase, trans-heptaprenyltranstransferase, trans-prenyltransferase) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesyltranstransferase (adding 5 isopentenyl units). [1] [2] This enzyme catalyses the following chemical reaction

(2E,6E)-farnesyl diphosphate + 5 isopentenyl diphosphate 5 diphosphate + all-trans-octaprenyl diphosphate

This enzyme catalyses the condensation reactions resulting in the formation of all-trans-octaprenyl diphosphate.

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<span class="mw-page-title-main">Polyprenyl synthetase</span>

Polyprenyl synthetases are a class of enzymes responsible for synthesis of isoprenoids. Isoprenoid compounds are synthesized by various organisms. For example, in eukaryotes the isoprenoid biosynthetic pathway is responsible for the synthesis of a variety of end products including cholesterol, dolichol, ubiquinone or coenzyme Q. In bacteria this pathway leads to the synthesis of isopentenyl tRNA, isoprenoid quinones, and sugar carrier lipids. Among the enzymes that participate in that pathway, are a number of polyprenyl synthetase enzymes which catalyze a 1'4-condensation between 5-carbon isoprene units. It has been shown that all the above enzymes share some regions of sequence similarity. Two of these regions are rich in aspartic-acid residues and could be involved in the catalytic mechanism and/or the binding of the substrates.

Hexaprenyl diphosphate synthase is an enzyme with systematic name geranylgeranyl-diphosphate:isopentenyl-diphosphate transferase . This enzyme catalyses the following chemical reaction

Hexaprenyl-diphosphate synthase is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesyltranstransferase . This enzyme catalyses the following chemical reaction

All-trans-nonaprenyl-diphosphate synthase is an enzyme with systematic name geranyl-diphosphate:isopentenyl-diphosphate transtransferase . This enzyme catalyses the following chemical reaction

Trans,polycis-decaprenyl diphosphate synthase is an enzyme with systematic name (2Z,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesylcistransferase . This enzyme catalyses the following chemical reaction

Ditrans,polycis-polyprenyl diphosphate synthase is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate:isopentenyl-diphosphate cistransferase . This enzyme catalyses the following chemical reaction

Trans,polycis-polyprenyl diphosphate synthase is an enzyme with systematic name (2Z,6E)-farnesyl-diphosphate:isopentenyl-diphosphate cistransferase . This enzyme catalyses the following chemical reaction

All-trans-decaprenyl-diphosphate synthase is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesyltranstransferase . This enzyme catalyses the following chemical reaction

(S)-β-bisabolene synthase (EC 4.2.3.55) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase ((S)-β-bisabolene-forming). This enzyme catalyses the following chemical reaction

5-Epiaristolochene synthase is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase ( -5-epiaristolochene-forming). This enzyme catalyses the following chemical reaction

(+)-Epicubenol synthase (EC 4.2.3.64, farnesyl pyrophosphate cyclase) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase ((+)-epicubenol-forming). This enzyme catalyses the following chemical reaction

Patchoulol synthase (EC 4.2.3.70) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase (patchoulol-forming). This enzyme catalyses the following chemical reaction

β-Copaene synthase is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase . This enzyme catalyses the following chemical reaction

(+)-Sativene synthase is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase . This enzyme catalyses the following chemical reaction

References

  1. Fujisaki S, Nishino T, Katsuki H (May 1986). "Isoprenoid synthesis in Escherichia coli. Separation and partial purification of four enzymes involved in the synthesis". Journal of Biochemistry. 99 (5): 1327–37. doi:10.1093/oxfordjournals.jbchem.a135600. PMID   3519603.
  2. Asai K, Fujisaki S, Nishimura Y, Nishino T, Okada K, Nakagawa T, Kawamukai M, Matsuda H (July 1994). "The identification of Escherichia coli ispB (cel) gene encoding the octaprenyl diphosphate synthase". Biochemical and Biophysical Research Communications. 202 (1): 340–5. doi:10.1006/bbrc.1994.1933. PMID   8037730.