4XTO

Crystal structure of the light-driven sodium pump KR2 in the pentameric red form, pH 5.6

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E (A, B, C, D, E)	Sodium pumping rhodopsin	polymer	288	32879.0	5	UniProt (N0DKS8) Pfam (PF01036)	Dokdonia eikasta
2	F, I, M, P, S (A, B, C, D, E)	SODIUM ION	non-polymer		23.0	5	Chemie (NA)
3	G, H, J, K, L... (A, B, C, D, E)	EICOSANE	non-polymer		282.5	10	Chemie (LFA)
4	U, V, W, X, Y (A, B, C, D, E)	water	water		18.0	15	Chemie (HOH)

Sequence modifications

A, B, C, D, E: 1 - 280 (UniProt: N0DKS8)

PDB	External Database	Details
Leu 281	-	expression tag
Glu 282	-	expression tag
His 283	-	expression tag
His 284	-	expression tag
His 285	-	expression tag
His 286	-	expression tag
His 287	-	expression tag
His 288	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	164395.0
Non-Polymers*	Number of molecules	15
	Total formula weight	2940.4
All*	Total formula weight	167335.5

*Water molecules are not included.