1WKQ

Crystal Structure of Bacillus subtilis Guanine Deaminase. The first domain-swapped structure in the cytidine deaminase superfamily

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)	Guanine deaminase	polymer	164	18205.5	2	UniProt (O34598) Pfam (PF00383)	Bacillus subtilis	Guanase, Guanine aminase, Guanine aminohydrolase, GAH, GDEase
2	C, E (A, B)	ZINC ION	non-polymer		65.4	2	Chemie (ZN)
3	D, F (A, B)	IMIDAZOLE	non-polymer		69.1	2	Chemie (IMD)
4	G, H (A, B)	water	water		18.0	450	Chemie (HOH)

Sequence modifications

A, B: 1 - 156 (UniProt: O34598)

PDB	External Database	Details
Met -8	-	expression tag
His -7	-	expression tag
His -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
Ala -1	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	36411.1
Non-Polymers*	Number of molecules	4
	Total formula weight	269.0
All*	Total formula weight	36680.1

*Water molecules are not included.