6E44

CRYSTAL STRUCTURE OF HUMAN INDOLEAMINE 2,3-DIOXYGENASE 1 (IDO1) free enzyme in the ferric state

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 (A, B, C, D)	Indoleamine 2,3-dioxygenase 1	polymer	405	45300.9	4	UniProt (P14902) Pfam (PF01231)	Homo sapiens (Human)	IDO-1,Indoleamine-pyrrole 2,3-dioxygenase
2	E, F, H, I (A, B, C, D)	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	4	Chemie (HEM)
3	G, J, K (B, D)	PHOSPHATE ION	non-polymer		95.0	3	Chemie (PO4)
4	L, M, N, O (A, B, C, D)	water	water		18.0	938	Chemie (HOH)

Sequence modifications

A, B, C, D: 15 - 403 (UniProt: P14902)

PDB	External Database	Details
Met -1	-	initiating methionine
Gly 0	-	expression tag
Ser 1	-	expression tag
Ser 2	-	expression tag
His 3	-	expression tag
His 4	-	expression tag
His 5	-	expression tag
His 6	-	expression tag
His 7	-	expression tag
His 8	-	expression tag
Ser 9	-	expression tag
Ser 10	-	expression tag
Gly 11	-	expression tag
Ser 12	-	expression tag
Ala 13	-	expression tag
Ala 14	-	expression tag
Ala 116	Lys 116	engineered mutation
Ala 117	Lys 117	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	181203.6
Non-Polymers*	Number of molecules	7
	Total formula weight	2750.9
All*	Total formula weight	183954.5

*Water molecules are not included.