8W4D

Crystal structure of the sigma-1 receptor from Xenopus laevis in the absence of known ligands

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Sigma non-opioid intracellular receptor 1	polymer	233	25720.3	1	UniProt (Q6DCU6) Pfam (PF04622) In PDB	Xenopus laevis (African clawed frog)
2		water	water		18.0	89	Chemie (HOH)

Sequence modifications

A: 1 - 221 (UniProt: Q6DCU6)

PDB	External Database	Details
Gly -8	-	expression tag
Gly -7	-	expression tag
Gly -6	-	expression tag
Gly -5	-	expression tag
Arg -4	-	expression tag
Ser -3	-	expression tag
Val -2	-	expression tag
Asp -1	-	expression tag
Thr 0	-	expression tag
Ala 222	-	expression tag
Ala 223	-	expression tag
Ala 224	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	25720.3
All*	Total formula weight	25720.3

*Water molecules are not included.