4FYY

E. coli Aspartate Transcarbamoylase Complexed with CTP, UTP, and Mg2+

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	B, D	URIDINE 5'-TRIPHOSPHATE	non-polymer		484.1	2	Chemie (UTP)
5	B, D	CYTIDINE-5'-TRIPHOSPHATE	non-polymer		483.2	2	Chemie (CTP)
6	B, D	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
7		water	water		18.0	574	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	102961.5
Non-Polymers*	Number of molecules	8
	Total formula weight	2114.0
All*	Total formula weight	105075.5

*Water molecules are not included.