PlantSME Plant secondary metabolism enzyme database
Steroid portable pathway

Steroid portable pathway

Category：Steroid pathway

Steroid pathway definition imported from the 2026-05-17 portable BLAST/HMM package.

Representative Steroid Reaction Route
Squalene to phytosterols and brassinosteroid branch. The steroid route starts from triterpenoid precursors, proceeds through squalene, 2,3-oxidosqualene, and cycloartenol, and then branches toward phytosterols and brassinosteroids; long branches are shown as curated modules.
3 curated steps/modules
Sterol Scaffold Formation
01
Substrate
Farnesyl diphosphate
C15H28O7P2
C15 prenyl-OPP
Squalene synthesis, epoxidation, and cyclization
SQS/FDFT128 SQE21 CAS480
Product
Cycloartenol
C30H50O
tetracyclic sterol nucleus with cyclopropyl side
SQS/SQE/CAS convert FPP-derived linear triterpenes into the plant sterol core.
02
Substrate
Cycloartenol-series intermediates
C28-C30 sterols
tetracyclic sterol nucleus
Demethylation, reduction, and side-chain remodeling
SMT1/SMT2/SMT3237 SMO1/SMO287 CPI18 CYP51G188 FK13 HYD18 DWF757 DWF54 DWF129
Product
Phytosterols
C28H48O / C29H50O
sterol nucleus-C8/C9 side chain
This segment converts cycloartenol-series intermediates into phytosterol pools such as sitosterol and campesterol.
Brassinosteroid Branch
Lineage Distribution
Assignments under this module are distributed across the following plant lineages.
All Lineages Gymnosperms (1147)
Current lineage filter: Gymnosperms. All species, family, module, and gene statistics below have been narrowed to this lineage.
Algae
Hits0
Bryophytes
Hits0
Lycophytes/Ferns
Hits0
Gymnosperms
Hits1147
Basal angiosperms
Hits0
Monocots
Hits0
Eudicots
Hits0
Species Distribution
Pinus taeda
Abies alba
Ginkgo biloba
Gnetum montanum
Taxus chinensis
Welwitschia mirabilis
Lineage Summary
Gymnosperms
1147
Module Gene List
Reset
GeneSpeciesProtein ID
Aalbaalba5_s002385250652400.1 abies_alba Aalbaalba5_s002385250652400.1
Aalbaalba5_s002414740655870.1 abies_alba Aalbaalba5_s002414740655870.1
Aalbaalba5_s002522880668270.1 abies_alba Aalbaalba5_s002522880668270.1
Aalbaalba5_s002532800669420.1 abies_alba Aalbaalba5_s002532800669420.1
Aalbaalba5_s002712050688630.1 abies_alba Aalbaalba5_s002712050688630.1
Aalbaalba5_s002783350695440.1 abies_alba Aalbaalba5_s002783350695440.1
Aalbaalba5_s002807170697730.1 abies_alba Aalbaalba5_s002807170697730.1
Aalbaalba5_s002938710710060.1 abies_alba Aalbaalba5_s002938710710060.1
Aalbaalba5_s003114400724720.1 abies_alba Aalbaalba5_s003114400724720.1
Aalbaalba5_s003156760728340.1 abies_alba Aalbaalba5_s003156760728340.1
Aalbaalba5_s003465630750700.1 abies_alba Aalbaalba5_s003465630750700.1
Aalbaalba5_s003465630750700.2 abies_alba Aalbaalba5_s003465630750700.2
Aalbaalba5_s003556810756330.1 abies_alba Aalbaalba5_s003556810756330.1
Aalbaalba5_s003908860777570.1 abies_alba Aalbaalba5_s003908860777570.1
Aalbaalba5_s004110050789030.1 abies_alba Aalbaalba5_s004110050789030.1
Aalbaalba5_s004252430796600.1 abies_alba Aalbaalba5_s004252430796600.1
Aalbaalba5_s004374230802540.1 abies_alba Aalbaalba5_s004374230802540.1
Aalbaalba5_s004374230802540.2 abies_alba Aalbaalba5_s004374230802540.2
Aalbaalba5_s004814740821340.1 abies_alba Aalbaalba5_s004814740821340.1
Aalbaalba5_s005335720841260.1 abies_alba Aalbaalba5_s005335720841260.1
Aalbaalba5_s005425490844170.1 abies_alba Aalbaalba5_s005425490844170.1
Aalbaalba5_s005630100850260.1 abies_alba Aalbaalba5_s005630100850260.1
Aalbaalba5_s005630100850260.2 abies_alba Aalbaalba5_s005630100850260.2
Aalbaalba5_s005640990850630.1 abies_alba Aalbaalba5_s005640990850630.1
Aalbaalba5_s006113110862230.1 abies_alba Aalbaalba5_s006113110862230.1
Aalbaalba5_s007204300883060.1 abies_alba Aalbaalba5_s007204300883060.1
Aalbaalba5_s008684340901260.1 abies_alba Aalbaalba5_s008684340901260.1
Aalbaalba5_s008855780902910.1 abies_alba Aalbaalba5_s008855780902910.1
Aalbaalba5_s010344310914860.1 abies_alba Aalbaalba5_s010344310914860.1
Gbil01G0000600.1 ginkgo_biloba Gbil01G0000600.1