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/FDFT176 SQE36 CAS940
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/SMT3184 SMO1/SMO265 CPI131 CYP51G111 FK84 HYD135 DWF7146 DWF5174 DWF115
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 Algae (1896)
Current lineage filter: Algae. All species, family, module, and gene statistics below have been narrowed to this lineage.
Algae
Hits1896
Bryophytes
Hits0
Lycophytes/Ferns
Hits0
Gymnosperms
Hits0
Basal angiosperms
Hits0
Monocots
Hits0
Eudicots
Hits0
Species Distribution
Chara braunii
Chromochloris zofingiensis
Penium margaritaceum
Botryococcus braunii
Chlamydomonas reinhardtii
Chlamydomonas schloesseri
Cyanophora paradoxa
Chlorokybus atmophyticus
Dunaliella salina
Takakia lepidozioides
Lineage Summary
Algae
1896
Module Gene List
Reset
GeneSpeciesProtein ID
Aprocontig_KL6620800001400.1 auxenochlorella_protothecoides Aprocontig_KL6620800001400.1
Aprocontig_KL6620900007470.1 auxenochlorella_protothecoides Aprocontig_KL6620900007470.1
Aprocontig_KL6620920009010.1 auxenochlorella_protothecoides Aprocontig_KL6620920009010.1
Aprocontig_KL6620940009720.1 auxenochlorella_protothecoides Aprocontig_KL6620940009720.1
Aprocontig_KL6621070018870.1 auxenochlorella_protothecoides Aprocontig_KL6621070018870.1
Aprocontig_KL6621070019100.1 auxenochlorella_protothecoides Aprocontig_KL6621070019100.1
Aprocontig_KL6621090020480.1 auxenochlorella_protothecoides Aprocontig_KL6621090020480.1
Aprocontig_KL6621150027810.1 auxenochlorella_protothecoides Aprocontig_KL6621150027810.1
Aprocontig_KL6621190029400.1 auxenochlorella_protothecoides Aprocontig_KL6621190029400.1
Aprocontig_KL6621250034380.1 auxenochlorella_protothecoides Aprocontig_KL6621250034380.1
Aprocontig_KL6621270037450.1 auxenochlorella_protothecoides Aprocontig_KL6621270037450.1
Aprocontig_KL6621270038410.1 auxenochlorella_protothecoides Aprocontig_KL6621270038410.1
Aprocontig_KL6621330041910.1 auxenochlorella_protothecoides Aprocontig_KL6621330041910.1
Aprocontig_KL6621350042080.1 auxenochlorella_protothecoides Aprocontig_KL6621350042080.1
Aprocontig_KL6621820062460.1 auxenochlorella_protothecoides Aprocontig_KL6621820062460.1
Aprocontig_KL6621860065200.1 auxenochlorella_protothecoides Aprocontig_KL6621860065200.1
Aprocontig_KL6621890067080.1 auxenochlorella_protothecoides Aprocontig_KL6621890067080.1
Aprocontig_KL6621890067100.1 auxenochlorella_protothecoides Aprocontig_KL6621890067100.1
Aprocontig_KL6621890067200.1 auxenochlorella_protothecoides Aprocontig_KL6621890067200.1
Bathy01g05370 bathycoccus_prasinos Bathy01g05370
Bathy01g06810 bathycoccus_prasinos Bathy01g06810
Bathy03g04230 bathycoccus_prasinos Bathy03g04230
Bathy06g02200 bathycoccus_prasinos Bathy06g02200
Bathy06g04270 bathycoccus_prasinos Bathy06g04270
Bathy07g01400 bathycoccus_prasinos Bathy07g01400
Bathy08g02180 bathycoccus_prasinos Bathy08g02180
Bathy08g04310 bathycoccus_prasinos Bathy08g04310
Bathy09g04120 bathycoccus_prasinos Bathy09g04120
Bathy09g04590 bathycoccus_prasinos Bathy09g04590
Bathy13g01980 bathycoccus_prasinos Bathy13g01980