7KBZ

Artificial Metalloproteins with Dinuclear Iron Centers

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)	Streptavidin	polymer	159	16561.9	4	UniProt (P22629) Pfam (PF01382)	Streptomyces avidinii
2	E, G, I, J (A, B, C, D)	{N-(4-{bis[(pyridin-2-yl-kappaN)methyl]amino-kappaN}butyl)-5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanamide}iron(3+)	non-polymer		552.5	4	Chemie (KM3)
3	F, H (A, B)	CYANIDE ION	non-polymer		26.0	2	Chemie (CYN)
4	K, L, M, N (A, B, C, D)	water	water		18.0	272	Chemie (HOH)

Sequence modifications

A, B, C, D: 14 - 159 (UniProt: P22629)

PDB	External Database	Details
Met 1	-	initiating methionine
Ala 2	-	expression tag
Ser 3	-	expression tag
Met 4	-	expression tag
Thr 5	-	expression tag
Gly 6	-	expression tag
Gly 7	-	expression tag
Gln 8	-	expression tag
Gln 9	-	expression tag
Met 10	-	expression tag
Gly 11	-	expression tag
Arg 12	-	expression tag
Asp 13	-	expression tag
Ala 121	Lys 145	engineered mutation
Tyr 124	Leu 148	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	66247.7
Non-Polymers*	Number of molecules	6
	Total formula weight	2262.1
All*	Total formula weight	68509.8

*Water molecules are not included.