Ent-kaurene synthase

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ent-kaurene synthase
Identifiers
EC no. 4.2.3.19
CAS no. 9055-64-5
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ExPASy NiceZyme view
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MetaCyc metabolic pathway
PRIAM profile
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Gene Ontology AmiGO / QuickGO
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NCBI proteins

The enzyme ent-kaurene synthase (EC 4.2.3.19) catalyzes the chemical reaction

ent-copalyl diphosphate ent-kaurene + diphosphate

This enzyme belongs to the family of lyases, specifically those carbon-oxygen lyases acting on phosphates. The systematic name of this enzyme class is ent-copalyl-diphosphate diphosphate-lyase (cyclizing, ent-kaurene-forming). Other names in common use include ent-kaurene synthase B, ent-kaurene synthetase B, ent-copalyl-diphosphate diphosphate-lyase, and (cyclizing). This enzyme participates in diterpenoid biosynthesis.

In Stevia

In Stevia spp., ent-kaurene synthase is a required part of the biosynthesis of steviol. [1] [2] Hajihashemi et al., 2013 find that it is involved in the drought stress response and because it mimics drought stress paclobutrazol toxicity. [1] [2] Both inhibit transcription of steviol glycoside synthesis genes including ent-kaurene synthase. [1] [2] This is believed to reduce steviol content in the final plant product. [1] [2]

References

  1. 1 2 3 4 Zhou, Xuan; Gong, Mengyue; Lv, Xueqin; Liu, Yanfeng; Li, Jianghua; Du, Guocheng; Liu, Long (2021). "Metabolic engineering for the synthesis of steviol glycosides: current status and future prospects". Applied Microbiology and Biotechnology . 105 (13). Springer: 5367–5381. doi:10.1007/s00253-021-11419-3. ISSN   0175-7598. PMID   34196745.
  2. 1 2 3 4 Hajihashemi, Shokoofeh (2021). "Agronomic practices". Steviol Glycosides. Elsevier. pp. 31–56. doi:10.1016/b978-0-12-820060-5.00002-9. ISBN   978-0-12-820060-5.