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
Czof06G0007670.1 chromochloris_zofingiensis Czof06G0007670.1
Czof07G0000430.1 chromochloris_zofingiensis Czof07G0000430.1
Czof07G0006800.1 chromochloris_zofingiensis Czof07G0006800.1
Czof08G0002910.1 chromochloris_zofingiensis Czof08G0002910.1
Czof10G0005360.1 chromochloris_zofingiensis Czof10G0005360.1
Czof12G0006730.1 chromochloris_zofingiensis Czof12G0006730.1
Czof12G0006790.1 chromochloris_zofingiensis Czof12G0006790.1
Czof14G0002890.1 chromochloris_zofingiensis Czof14G0002890.1
Czof15G0001510.1 chromochloris_zofingiensis Czof15G0001510.1
Czof15G0001560.1 chromochloris_zofingiensis Czof15G0001560.1
Czof15G0001570.1 chromochloris_zofingiensis Czof15G0001570.1
Czof19G0002780.1 chromochloris_zofingiensis Czof19G0002780.1
CzofchrUn596980008480.1 chromochloris_zofingiensis CzofchrUn596980008480.1
Cpartig000000420001340.v1.176 cyanophora_paradoxa Cpartig000000420001340.v1.176
Cpartig000000420002120.v1.176 cyanophora_paradoxa Cpartig000000420002120.v1.176
Cpartig000002480037450.v1.176 cyanophora_paradoxa Cpartig000002480037450.v1.176
Cpartig000002540039650.v1.176 cyanophora_paradoxa Cpartig000002540039650.v1.176
Cpartig000002820041790.v1.176 cyanophora_paradoxa Cpartig000002820041790.v1.176
Cpartig000004300057200.v1.176 cyanophora_paradoxa Cpartig000004300057200.v1.176
Cpartig000004480059110.v1.176 cyanophora_paradoxa Cpartig000004480059110.v1.176
Cpartig000008020089770.v1.176 cyanophora_paradoxa Cpartig000008020089770.v1.176
Cpartig000009800104680.v1.176 cyanophora_paradoxa Cpartig000009800104680.v1.176
Cpartig000010290109010.v1.176 cyanophora_paradoxa Cpartig000010290109010.v1.176
Cpartig000010520111390.v1.176 cyanophora_paradoxa Cpartig000010520111390.v1.176
Cpartig000010930114230.v1.176 cyanophora_paradoxa Cpartig000010930114230.v1.176
Cpartig000010950114880.v1.176 cyanophora_paradoxa Cpartig000010950114880.v1.176
Cpartig000011070115440.v1.176 cyanophora_paradoxa Cpartig000011070115440.v1.176
Cpartig000011070115510.v1.176 cyanophora_paradoxa Cpartig000011070115510.v1.176
Cpartig000011270116080.v1.176 cyanophora_paradoxa Cpartig000011270116080.v1.176
Cpartig000012310121210.v1.176 cyanophora_paradoxa Cpartig000012310121210.v1.176