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) PubChem (1070) PubChem (23254473) PubChem (177675058) PubChem (638015) PubChem (87082476) PubChem (87110449) PubChem (87110609) PubChem (88398773) PubChem (88407543) PubChem (5280490) PubChem (5353924) PubChem (5381765) PubChem (6436079) PubChem (6436082) PubChem (11426127) PubChem (12227253) PubChem (12227254) PubChem (12227256) PubChem (12227257) PubChem (12227258) PubChem (12227259) PubChem (12227269) PubChem (12227270) PubChem (12227271) PubChem (134688327) PubChem (140510408) PubChem (145826762) PubChem (169423542) PubChem (172878320)
3	D, E (A)	ACETATE ION	non-polymer		59.0	2	Chemie (ACT) PubChem (175)
4	G (B)	[(Z)-octadec-9-enyl] (2R)-2,3-bis(oxidanyl)propanoate	non-polymer		356.5	1	Chemie (MPG) PubChem (17754086) PubChem (44201365) PubChem (46936801) PubChem (56987534) PubChem (5168638) PubChem (6289863) PubChem (11681934)
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.