4XB4

Structure of the N-terminal domain of OCP binding canthaxanthin

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)	Orange carotenoid-binding protein	polymer	152	16605.0	2	UniProt (P74102) Pfam (PF09150)	Synechocystis sp.	OCP
2	C, D (A, B)	beta,beta-carotene-4,4'-dione	non-polymer		564.8	2	Chemie (45D)
3	E, F (A, B)	water	water		18.0	364	Chemie (HOH)

Sequence modifications

A, B: 21 - 165 (UniProt: P74102)

PDB	External Database	Details
Met 20	-	initiating methionine
His 166	-	expression tag
His 167	-	expression tag
His 168	-	expression tag
His 169	-	expression tag
His 170	-	expression tag
His 171	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	33210.0
Non-Polymers*	Number of molecules	2
	Total formula weight	1129.7
All*	Total formula weight	34339.7

*Water molecules are not included.