3D7S

Crystal structure of Wild-Type E. Coli Asparate Transcarbamoylase at pH 8.5 at 2.80 A Resolution

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	Aspartate carbamoyltransferase catalytic chain	polymer	310	34337.1	2	UniProt (P0A786) Pfam (PF02729) Pfam (PF00185) In PDB	Escherichia coli	Aspartate transcarbamylase, ATCase
2	B, D	Aspartate carbamoyltransferase regulatory chain	polymer	153	17143.6	2	UniProt (P0A7F3) Pfam (PF01948) Pfam (PF02748) In PDB	Escherichia coli
3	B, D	ZINC ION	non-polymer		65.4	2	Chemie (ZN)
4		water	water		18.0	137	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	102961.5
Non-Polymers*	Number of molecules	2
	Total formula weight	130.8
All*	Total formula weight	103092.3

*Water molecules are not included.