3Q2O

Crystal Structure of purK: N5-carboxyaminoimidazole ribonucleotide synthetase

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Phosphoribosylaminoimidazole carboxylase, ATPase subunit	polymer	389	43209.4	2	UniProt (C3PBM5) In PDB	Bacillus anthracis	N5-carboxyaminoimidazole ribonucleotide synthetase
2	A, B	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
3		water	water		18.0	379	Chemie (HOH)

Sequence modifications

A, B: 1 - 383 (UniProt: C3PBM5)

PDB	External Database	Details
Gly -5	-	expression tag
Ser -4	-	expression tag
His -3	-	expression tag
Met -2	-	expression tag
Leu -1	-	expression tag
Asp 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	86418.7
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	86467.3

*Water molecules are not included.