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/FDFT190 SQE37 CAS726
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/SMT3593 SMO1/SMO2208 CPI118 CYP51G1179 FK18 HYD122 DWF7106 DWF55 DWF128
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 Basal angiosperms (2224)
Current lineage filter: Basal angiosperms. All species, family, module, and gene statistics below have been narrowed to this lineage.
Algae
Hits0
Bryophytes
Hits0
Lycophytes/Ferns
Hits0
Gymnosperms
Hits0
Basal angiosperms
Hits2224
Monocots
Hits0
Eudicots
Hits0
Species Distribution
Brasenia schreberi
Annona cherimola
Cinnamomum kanehirae
Cinnamomum camphora
Chloranthus sessilifolius
Amborella trichopoda
Piper nigrum
Aristolochia contorta
Nymphaea colorata
Liriodendron chinense
Lineage Summary
Basal angiosperms
2224
Module Gene List
Reset
GeneSpeciesProtein ID
brasenia_schreberi_Brsc31g0328.t1 brasenia_schreberi brasenia_schreberi_Brsc31g0328.t1
brasenia_schreberi_Brsc31g0491.t1 brasenia_schreberi brasenia_schreberi_Brsc31g0491.t1
brasenia_schreberi_Brsc31g0957.t1 brasenia_schreberi brasenia_schreberi_Brsc31g0957.t1
brasenia_schreberi_Brsc32g898.t2 brasenia_schreberi brasenia_schreberi_Brsc32g898.t2
brasenia_schreberi_Brsc33g0094.t3 brasenia_schreberi brasenia_schreberi_Brsc33g0094.t3
brasenia_schreberi_Brsc33g0155.t1 brasenia_schreberi brasenia_schreberi_Brsc33g0155.t1
brasenia_schreberi_Brsc33g0645.t1 brasenia_schreberi brasenia_schreberi_Brsc33g0645.t1
brasenia_schreberi_Brsc33g0668.t1 brasenia_schreberi brasenia_schreberi_Brsc33g0668.t1
brasenia_schreberi_Brsc33g0821.t1 brasenia_schreberi brasenia_schreberi_Brsc33g0821.t1
brasenia_schreberi_Brsc33g0861.t1 brasenia_schreberi brasenia_schreberi_Brsc33g0861.t1
brasenia_schreberi_Brsc33g0903.t1 brasenia_schreberi brasenia_schreberi_Brsc33g0903.t1
brasenia_schreberi_Brsc33g1197.t6 brasenia_schreberi brasenia_schreberi_Brsc33g1197.t6
brasenia_schreberi_Brsc34g0031.t1 brasenia_schreberi brasenia_schreberi_Brsc34g0031.t1
brasenia_schreberi_Brsc34g0378.t1 brasenia_schreberi brasenia_schreberi_Brsc34g0378.t1
brasenia_schreberi_Brsc35g0192.t3 brasenia_schreberi brasenia_schreberi_Brsc35g0192.t3
brasenia_schreberi_Brsc35g0226.t1 brasenia_schreberi brasenia_schreberi_Brsc35g0226.t1
brasenia_schreberi_Brsc35g0238.t2 brasenia_schreberi brasenia_schreberi_Brsc35g0238.t2
brasenia_schreberi_Brsc35g0432.t1 brasenia_schreberi brasenia_schreberi_Brsc35g0432.t1
brasenia_schreberi_Brsc35g0659.t1 brasenia_schreberi brasenia_schreberi_Brsc35g0659.t1
brasenia_schreberi_Brsc35g0763.t2 brasenia_schreberi brasenia_schreberi_Brsc35g0763.t2
brasenia_schreberi_Brsc35g0909.t1 brasenia_schreberi brasenia_schreberi_Brsc35g0909.t1
brasenia_schreberi_Brsc35g1648.t1 brasenia_schreberi brasenia_schreberi_Brsc35g1648.t1
brasenia_schreberi_Brsc36g0363.t1 brasenia_schreberi brasenia_schreberi_Brsc36g0363.t1
Cses01G0004080.1 chloranthus_sessilifolius Cses01G0004080.1
Cses01G0006040.1 chloranthus_sessilifolius Cses01G0006040.1
Cses01G0008000.1 chloranthus_sessilifolius Cses01G0008000.1
Cses01G0012740.1 chloranthus_sessilifolius Cses01G0012740.1
Cses01G0013870.1 chloranthus_sessilifolius Cses01G0013870.1
Cses01G0016670.1 chloranthus_sessilifolius Cses01G0016670.1
Cses01G0020700.1 chloranthus_sessilifolius Cses01G0020700.1