9E6Z

Streptavidin-E101Q-S112F-K121A bound to Cu(II)-biotin-ethyl-dipicolylamine cofactor

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Streptavidin	polymer	159	16571.0	1	UniProt (P22629) Pfam (PF01382)	Streptomyces avidinii
2	B (A)	N-(2-{bis[(pyridin-2-yl)methyl]amino}ethyl)-5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanamide	non-polymer		468.6	1	Chemie (QG7)
3	C (A)	ACETIC ACID	non-polymer		60.1	1	Chemie (ACY)
4	D (A)	COPPER (II) ION	non-polymer		63.5	1	Chemie (CU)
5	E (A)	water	water		18.0	76	Chemie (HOH)

Sequence modifications

A: 14 - 159 (UniProt: P22629)

PDB	External Database	Details
Met 1	-	expression tag
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
Gln 101	Glu 125	engineered mutation
Phe 112	Ser 136	engineered mutation
Ala 121	Lys 145	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	16571.0
Non-Polymers*	Number of molecules	3
	Total formula weight	592.2
All*	Total formula weight	17163.2

*Water molecules are not included.