6RF1

Crystal structure of the light-driven sodium pump KR2 in the pentameric "wet" form

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	Sodium pumping rhodopsin	polymer	288	32611.6	5	UniProt (N0DKS8) Pfam (PF01036) In PDB	Dokdonia eikasta
2	D, A, C, E, B	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	non-polymer		356.5	23	Chemie (OLC)
3	B, D, A, C, E	EICOSANE	non-polymer		282.5	35	Chemie (LFA)
4	B, D, A, C	SODIUM ION	non-polymer		23.0	5	Chemie (NA)
5	B, D, A, C, E	octyl beta-D-glucopyranoside	non-polymer		292.4	5	Chemie (BOG)
6	B, D, A, C, E	RETINAL	non-polymer		284.4	5	Chemie (RET)
7		water	water		18.0	199	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	163057.9
Non-Polymers*	Number of molecules	73
	Total formula weight	21088.5
All*	Total formula weight	184146.4

*Water molecules are not included.