3BR3

Crystal Structure of the Complex of Ethidium Bound to QacR(E90Q), a Mutant of a Multidrug Binding Transcriptional Repressor

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B, A	HTH-type transcriptional regulator qacR	polymer	194	22939.9	2	UniProt (P0A0N3) Pfam (PF00440) Pfam (PF08360) In PDB	Staphylococcus aureus
2	B, A	SULFATE ION	non-polymer		96.1	8	Chemie (SO4)
3	A	ETHIDIUM	non-polymer		314.4	1	Chemie (ET)
4		water	water		18.0	15	Chemie (HOH)

Sequence modifications

B, A: 1 - 188 (UniProt: P0A0N3)

PDB	External Database	Details
Ser 67	Lys 67	engineered mutation
Ala 72	Cys 72	engineered mutation
Gln 90	Glu 90	engineered mutation
Ser 141	Cys 141	engineered mutation
His 189	-	expression tag
His 190	-	expression tag
His 191	-	expression tag
His 192	-	expression tag
His 193	-	expression tag
His 194	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	45879.9
Non-Polymers*	Number of molecules	9
	Total formula weight	1082.9
All*	Total formula weight	46962.8

*Water molecules are not included.