Lanosterol synthase

Lanosterol synthase (EC 5.4.99.7) is an oxidosqualene cyclase (OSC) enzyme that converts (S)-2,3-oxidosqualene to a protosterol cation and finally to lanosterol. Lanosterol is a key four-ringed intermediate in cholesterol biosynthesis. In humans, lanosterol synthase is encoded by the LSS gene.

lanosterol synthase
Identifiers
EC no.5.4.99.7
CAS no.9032-71-7
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
Search
PMCarticles
PubMedarticles
NCBIproteins
LSS
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesLSS, OSC, CTRCT44, lanosterol synthase (2,3-oxidosqualene-lanosterol cyclase), lanosterol synthase, HYPT14, APMR4
External IDsOMIM: 600909 MGI: 1336155 HomoloGene: 37408 GeneCards: LSS
Orthologs
SpeciesHumanMouse
Entrez

4047

16987

Ensembl

ENSG00000160285
ENSG00000281289

ENSMUSG00000033105

UniProt

P48449

Q8BLN5

RefSeq (mRNA)

NM_001001438
NM_001145436
NM_001145437
NM_002340

NM_146006

RefSeq (protein)

NP_001001438
NP_001138908
NP_001138909
NP_002331

NP_666118

Location (UCSC)Chr 21: 46.19 – 46.23 MbChr 10: 76.37 – 76.39 Mb
PubMed search
Wikidata
View/Edit HumanView/Edit Mouse

In eukaryotes, lanosterol synthase is an integral monotopic protein associated with the cytosolic side of the endoplasmic reticulum. Some evidence suggests that the enzyme is a soluble, non-membrane bound protein in the few prokaryotes that produce it.

Due to the enzyme's role in cholesterol biosynthesis, there is interest in lanosterol synthase inhibitors as potential cholesterol-reducing drugs, to complement existing statins.

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