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Fig. 1 | BMC Plant Biology

Fig. 1

From: Metabolic stimulation-elicited transcriptional responses and biosynthesis of acylated triterpenoids precursors in the medicinal plant Helicteres angustifolia

Fig. 1

Two parent scaffold types of main triterpenoids and the diagram of a speculated triterpenoids biosynthetic pathway in H. angustifolia. A Lupane type parent scaffold. B Oleanane type parent scaffold. C Diagram of the speculated triterpenoids biosynthetic pathway. Enzymes related to the triterpenoids biosynthesis were shown in squares. Solid arrows represent validated steps and dotted arrows represent hypothetical steps. AACT: acetyl-CoA C-acetyltransferase; HMGS: hydroxymethylglutaryl-CoA synthase; HMGR: hydroxymethylglutaryl-CoA reductase; MVK: mevalonate kinase; PMK: phosphomevalonate kinase; MDC: diphosphomevalonate decarboxylase; IDI: isopentenyl-diphosphate Delta-isomerase. FPPS: farnesyl pyrophosphate synthase. SS: squalene synthase; SM: squalene monooxygenase; OSCs: Oxidosqualene cyclases; CYPs: cytochrome P450 enzymes; TATs: triterpenoids acetyl transferases; TBTs: triterpenoids benzoyl transferases

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BMC Plant Biology

ISSN: 1471-2229

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