4QID

Crystal structure of Haloquadratum walsbyi bacteriorhodopsin

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Bacteriorhodopsin-I	polymer	262	28490.1	2	UniProt (Q18DH8) Pfam (PF01036)	Haloquadratum walsbyi
2	C, F (A, B)	RETINAL	non-polymer		284.4	2	Chemie (RET)
3	D, E (A)	ACETATE ION	non-polymer		59.0	2	Chemie (ACT)
4	G (B)	[(Z)-octadec-9-enyl] (2R)-2,3-bis(oxidanyl)propanoate	non-polymer		356.5	1	Chemie (MPG)
5	H, I (A, B)	water	water		18.0	102	Chemie (HOH)

Sequence modifications

A, B: 3 - 254 (UniProt: Q18DH8)

PDB	External Database	Details
Met 1	-	expression tag
Ala 2	-	expression tag
Leu 255	-	expression tag
Glu 256	-	expression tag
His 257	-	expression tag
His 258	-	expression tag
His 259	-	expression tag
His 260	-	expression tag
His 261	-	expression tag
His 262	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	56980.2
Non-Polymers*	Number of molecules	5
	Total formula weight	1043.5
All*	Total formula weight	58023.7

*Water molecules are not included.