1XS4

dCTP deaminase from Escherichia coli- E138A mutant enzyme in complex with dCTP

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E...	Deoxycytidine triphosphate deaminase	polymer	193	21405.8	6	UniProt (P28248) Pfam (PF22769) In PDB	Escherichia coli	dCTP deaminase
2	A, B, C, D, E...	MAGNESIUM ION	non-polymer		24.3	6	Chemie (MG)
3	A, B, C, D, E...	2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE	non-polymer		467.2	6	Chemie (DCP)
4		water	water		18.0	229	Chemie (HOH)

Sequence modifications

A, B, C, D, E, F: 1 - 193 (UniProt: P28248)

PDB	External Database	Details
Mse 1	Met 1	modified residue
Mse 69	Met 69	modified residue
Mse 119	Met 119	modified residue
Ala 138	Glu 138	engineered mutation
Mse 153	Met 153	modified residue

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	128434.8
Non-Polymers*	Number of molecules	12
	Total formula weight	2948.8
All*	Total formula weight	131383.6

*Water molecules are not included.