1VB6

Crystal Structure of the heme PAS sensor domain of Ec DOS (oxygen-bound form)

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)	Heme pas sensor protein	polymer	167	19023.7	2	UniProt (P76129) Pfam (PF13426)	Escherichia coli
2	C, D (A, B)	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	2	Chemie (HEM)
3	E (B)	OXYGEN MOLECULE	non-polymer		32.0	1	Chemie (OXY)
4	F, G (A, B)	water	water		18.0	315	Chemie (HOH)

Sequence modifications

A, B: 1 - 147 (UniProt: P76129)

PDB	External Database	Details
Met -19	-	expression tag
Gly -18	-	expression tag
Ser -17	-	expression tag
Ser -16	-	expression tag
His -15	-	expression tag
His -14	-	expression tag
His -13	-	expression tag
His -12	-	expression tag
His -11	-	expression tag
His -10	-	expression tag
Ser -9	-	expression tag
Ser -8	-	expression tag
Gly -7	-	expression tag
Leu -6	-	expression tag
Val -5	-	expression tag
Pro -4	-	expression tag
Arg -3	-	expression tag
Gly -2	-	expression tag
Ser -1	-	expression tag
His 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	38047.3
Non-Polymers*	Number of molecules	3
	Total formula weight	1265.0
All*	Total formula weight	39312.3

*Water molecules are not included.