Annotations: 8W4E

Crystal structure of the sigma-1 receptor from Xenopus laevis in the absence of known ligands (C2 form)

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F	V-set	e8w4eF2	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: V-set	ECOD (v295)
E	V-set	e8w4eE2	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: V-set	ECOD (v295)
D	V-set	e8w4eD2	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: V-set	ECOD (v295)
C	V-set	e8w4eC2	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: V-set	ECOD (v295)
B	V-set	e8w4eB2	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: V-set	ECOD (v295)
A	V-set	e8w4eA2	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: V-set	ECOD (v295)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F	PF04622	ERG2 and Sigma1 receptor like protein (ERG2_Sigma1R)	ERG2 and Sigma1 receptor like protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F	Sigma non-opioid intracellular receptor 1	-	localization transport macromolecule localization lipid localization lipid transport establishment of localization	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure cytoplasmic vesicle organelle intracellular vesicle cytoplasm intracellular membrane-bounded organelle vesicle organelle inner membrane nuclear membrane membrane nucleus membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure cytoplasmic vesicle organelle intracellular vesicle cytoplasm intracellular membrane-bounded organelle vesicle organelle inner membrane nuclear membrane membrane nucleus endomembrane system organelle envelope nuclear inner membrane nuclear envelope organelle membrane nuclear outer membrane organelle outer membrane bounding membrane of organelle nuclear outer membrane-endoplasmic reticulum membrane network outer membrane endoplasmic reticulum organelle subcompartment endoplasmic reticulum subcompartment endoplasmic reticulum membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F	IPR006716	ERG2/sigma1 receptor-like	Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, F	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E A, B, C, D, E, F	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Novel Receptors	Sigma-1 (σ1) receptor complexed with progesterone by co-crstayllization, I432 space group

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.