4YRV

Crystal structure of Anabaena transcription factor HetR complexed with 21-bp DNA from hetP promoter

Replaces:  4K1M

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (B, A)	Heterocyst differentiation control protein	polymer	307	36034.4	2	UniProt (P27709) Pfam (PF03574) Pfam (PF18460)	Nostoc sp. PCC 7120	HETR
2	C (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 (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	E, F, G, H (B, C, D)	CALCIUM ION	non-polymer		40.1	4	Chemie (CA)
5	I, J, K, L (B, A, C, D)	water	water		18.0	31	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	4
	Total formula weight	160.3
All*	Total formula weight	85117.5

*Water molecules are not included.