6J05

Structures of two ArsR As(III)-responsive repressors: implications for the mechanism of derepression

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Transcriptional regulator ArsR	polymer	124	13871.7	2	UniProt (A0A2W1K2S1) Pfam (PF12840) UniProt (by SIFTS) (B7J952) In PDB	Acidithiobacillus ferrooxidans (Thiobacillus ferrooxidans)
2	A	ARSENIC	non-polymer		74.9	1	Chemie (ARS)
3	A, B	SODIUM ION	non-polymer		23.0	3	Chemie (NA)
4		water	water		18.0	120	Chemie (HOH)

Sequence modifications

A, B: 1 - 118 (UniProt: A0A2W1K2S1)

PDB	External Database	Details
His 119	-	expression tag
His 120	-	expression tag
His 121	-	expression tag
His 122	-	expression tag
His 123	-	expression tag
His 124	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27743.3
Non-Polymers*	Number of molecules	4
	Total formula weight	143.9
All*	Total formula weight	27887.2

*Water molecules are not included.