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
TlepHiC_scaffold_40123280 takakia_lepidozioides TlepHiC_scaffold_40123280
TlepHiC_scaffold_40127940 takakia_lepidozioides TlepHiC_scaffold_40127940
TlepHiC_scaffold_40128900 takakia_lepidozioides TlepHiC_scaffold_40128900
TlepHiC_scaffold_40129510 takakia_lepidozioides TlepHiC_scaffold_40129510
TlepHiC_scaffold_40144330 takakia_lepidozioides TlepHiC_scaffold_40144330
TlepHiC_scaffold_40150860 takakia_lepidozioides TlepHiC_scaffold_40150860
TlepHiC_scaffold_40151870 takakia_lepidozioides TlepHiC_scaffold_40151870
TlepHiC_scaffold_40155740 takakia_lepidozioides TlepHiC_scaffold_40155740
TlepHiC_scaffold_40160920 takakia_lepidozioides TlepHiC_scaffold_40160920
TlepHiC_scaffold_40163240 takakia_lepidozioides TlepHiC_scaffold_40163240
TlepHiC_scaffold_40173070 takakia_lepidozioides TlepHiC_scaffold_40173070
TlepHiC_scaffold_50185190 takakia_lepidozioides TlepHiC_scaffold_50185190
TlepHiC_scaffold_50186930 takakia_lepidozioides TlepHiC_scaffold_50186930
TlepHiC_scaffold_50188370 takakia_lepidozioides TlepHiC_scaffold_50188370
TlepHiC_scaffold_50189810 takakia_lepidozioides TlepHiC_scaffold_50189810
TlepHiC_scaffold_50190810 takakia_lepidozioides TlepHiC_scaffold_50190810
TlepHiC_scaffold_50198610 takakia_lepidozioides TlepHiC_scaffold_50198610
TlepHiC_scaffold_50203310 takakia_lepidozioides TlepHiC_scaffold_50203310
TlepHiC_scaffold_50204500 takakia_lepidozioides TlepHiC_scaffold_50204500
TlepHiC_scaffold_50213360 takakia_lepidozioides TlepHiC_scaffold_50213360
TlepHiC_scaffold_60231060 takakia_lepidozioides TlepHiC_scaffold_60231060
TlepHiC_scaffold_60233410 takakia_lepidozioides TlepHiC_scaffold_60233410
TlepHiC_scaffold_60236230 takakia_lepidozioides TlepHiC_scaffold_60236230
TlepHiC_scaffold_60250710 takakia_lepidozioides TlepHiC_scaffold_60250710
PNG99009.1_tsocial tetrabaena_socialis PNG99009.1_tsocial
PNG99260.1_tsocial tetrabaena_socialis PNG99260.1_tsocial
PNH01519.1_tsocial tetrabaena_socialis PNH01519.1_tsocial
PNH02071.1_tsocial tetrabaena_socialis PNH02071.1_tsocial
PNH02825.1_tsocial tetrabaena_socialis PNH02825.1_tsocial
PNH04779.1_tsocial tetrabaena_socialis PNH04779.1_tsocial