4HRI

Crystal structure of HetR in complex with a 21-bp palindromic DNA at the upstream of the hetP promoter from Anabaena

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B, A	Heterocyst differentiation control protein	polymer	307	36034.4	2	UniProt (P27709) Pfam (PF03574) Pfam (PF18460) In PDB	Nostoc (Anabaena)	HetR
2	C	DNA (5'-D(P*GP*CP*GP*AP*GP*GP*GP*GP*TP*CP*TP*AP*AP*CP*CP*CP*CP*TP*CP*AP*T)-3')	polymer	21	6424.1	1		Nostoc sp. PCC 7120
3	D	DNA (5'-D(P*AP*TP*GP*AP*GP*GP*GP*GP*TP*TP*AP*GP*AP*CP*CP*CP*CP*TP*CP*GP*C)-3')	polymer	21	6464.2	1		Nostoc sp. PCC 7120
4	C, D	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
5		water	water		18.0	6	Chemie (HOH)

Sequence modifications

B, A: 1 - 299 (UniProt: P27709)

PDB	External Database	Details
Met -7	-	expression tag
Gly -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	84957.2
Non-Polymers*	Number of molecules	3
	Total formula weight	120.2
All*	Total formula weight	85077.4

*Water molecules are not included.