Annotations: 1W6K

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1w6ka2	All alpha proteins	alpha/alpha toroid	Terpenoid cyclases/Protein prenyltransferases	Terpene synthases	Lanosterol synthase, middle domain	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1w6ka1	All alpha proteins	alpha/alpha toroid	Terpenoid cyclases/Protein prenyltransferases	Terpene synthases	Lanosterol synthase, N- and C-terminal domain	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Terpenoid cyclases/Protein prenyltransferases	8043294	3001024	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Terpenoid cyclases/Protein prenyltransferases	8043294	3001024	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Terpenoid cyclases/Protein prenyltransferases	8043295	3001024	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	SQHop_cyclase_C	e1w6kA1	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: SQHop_cyclase_C	ECOD (1.6)
A	SQHop_cyclase_N	e1w6kA2	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: SQHop_cyclase_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	6.20.120.20	Special	Other non-globular	OB fold (Dihydrolipoamide Acetyltransferase, E2P)		CATH (4.3.0)
A	1.50.10.20	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00432	Prenyltransferase alpha-alpha toroid domain (Prenyltrans)	Prenyltransferase and squalene oxidase repeat	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	LANOSTEROL SYNTHASE	isomerase activity lanosterol synthase activity catalytic activity oxidosqualene cyclase activity intramolecular transferase activity	regulation of protein stability biological regulation regulation of biological quality biosynthetic process steroid metabolic process lipid biosynthetic process primary metabolic process metabolic process cellular process steroid biosynthetic process lipid metabolic process secondary alcohol biosynthetic process small molecule biosynthetic process cholesterol biosynthetic process regulation of protein stability biological regulation regulation of biological quality biosynthetic process steroid metabolic process lipid biosynthetic process primary metabolic process metabolic process cellular process steroid biosynthetic process lipid metabolic process secondary alcohol biosynthetic process small molecule biosynthetic process cholesterol biosynthetic process organic hydroxy compound metabolic process sterol metabolic process cholesterol metabolic process alcohol metabolic process secondary alcohol metabolic process sterol biosynthetic process organic hydroxy compound biosynthetic process alcohol biosynthetic process small molecule metabolic process triterpenoid biosynthetic process triterpenoid metabolic process isoprenoid biosynthetic process terpenoid biosynthetic process terpenoid metabolic process isoprenoid metabolic process	cellular anatomical structure membrane lipid droplet intracellular organelle intracellular anatomical structure organelle membraneless organelle intracellular membraneless organelle membrane-bounded organelle organelle subcompartment intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network cellular anatomical structure membrane lipid droplet intracellular organelle intracellular anatomical structure organelle membraneless organelle intracellular membraneless organelle membrane-bounded organelle organelle subcompartment intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR032697	Squalene cyclase, N-terminal	Domain
A	IPR032696	Squalene cyclase, C-terminal	Domain
A	IPR018333	Squalene cyclase	Family
A	IPR002365	Terpene synthase, conserved site	Conserved Site
A	IPR008930	Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P48449	cataract 44 Q fever oligodendroglioma Pick disease testicular cancer Acute Q fever breast fibroadenoma cutaneous lupus erythematosus hypotrichosis lung cancer malignant glioma osteosarcoma pituitary cancer spinal stenosis testicular germ cell tumor cataract 44 Q fever oligodendroglioma Pick disease testicular cancer Acute Q fever breast fibroadenoma cutaneous lupus erythematosus hypotrichosis lung cancer malignant glioma osteosarcoma pituitary cancer spinal stenosis testicular germ cell tumor astrocytic tumor cataract esophageal adenocarcinoma large cell medulloblastoma lysosomal lipid storage disorder medulloblastoma ovarian cancer psoriasis spondylolisthesis atypical teratoid rhabdoid tumor glioblastoma malignant ependymoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Monotopic/peripheral	All alpha monotopic/peripheral	Six-hairpin glycosidase superfamily	Terpene synthases

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.