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_s000781360342910.1 abies_alba Aalbaalba5_s000781360342910.1
Aalbaalba5_s000787040344760.1 abies_alba Aalbaalba5_s000787040344760.1
Aalbaalba5_s000798600348310.1 abies_alba Aalbaalba5_s000798600348310.1
Aalbaalba5_s000798600348310.2 abies_alba Aalbaalba5_s000798600348310.2
Aalbaalba5_s000807170350970.1 abies_alba Aalbaalba5_s000807170350970.1
Aalbaalba5_s000880950371640.1 abies_alba Aalbaalba5_s000880950371640.1
Aalbaalba5_s000974140396770.1 abies_alba Aalbaalba5_s000974140396770.1
Aalbaalba5_s000975500397100.1 abies_alba Aalbaalba5_s000975500397100.1
Aalbaalba5_s000990940401320.1 abies_alba Aalbaalba5_s000990940401320.1
Aalbaalba5_s000990940401320.2 abies_alba Aalbaalba5_s000990940401320.2
Aalbaalba5_s000990940401330.1 abies_alba Aalbaalba5_s000990940401330.1
Aalbaalba5_s001021890409180.2 abies_alba Aalbaalba5_s001021890409180.2
Aalbaalba5_s001061290419030.1 abies_alba Aalbaalba5_s001061290419030.1
Aalbaalba5_s001080260424200.1 abies_alba Aalbaalba5_s001080260424200.1
Aalbaalba5_s001144730439970.1 abies_alba Aalbaalba5_s001144730439970.1
Aalbaalba5_s001148680440960.1 abies_alba Aalbaalba5_s001148680440960.1
Aalbaalba5_s001170680445790.1 abies_alba Aalbaalba5_s001170680445790.1
Aalbaalba5_s001202870453050.1 abies_alba Aalbaalba5_s001202870453050.1
Aalbaalba5_s001282090470610.1 abies_alba Aalbaalba5_s001282090470610.1
Aalbaalba5_s001334250481490.1 abies_alba Aalbaalba5_s001334250481490.1
Aalbaalba5_s001360850487230.1 abies_alba Aalbaalba5_s001360850487230.1
Aalbaalba5_s001519680519520.1 abies_alba Aalbaalba5_s001519680519520.1
Aalbaalba5_s001542790523920.1 abies_alba Aalbaalba5_s001542790523920.1
Aalbaalba5_s001560410527330.1 abies_alba Aalbaalba5_s001560410527330.1
Aalbaalba5_s001653730544870.1 abies_alba Aalbaalba5_s001653730544870.1
Aalbaalba5_s001653730544870.2 abies_alba Aalbaalba5_s001653730544870.2
Aalbaalba5_s001664470546940.1 abies_alba Aalbaalba5_s001664470546940.1
Aalbaalba5_s001729230558210.1 abies_alba Aalbaalba5_s001729230558210.1
Aalbaalba5_s001760030562980.1 abies_alba Aalbaalba5_s001760030562980.1
Aalbaalba5_s001765340563840.1 abies_alba Aalbaalba5_s001765340563840.1