1XJW

The Structure of E. coli Aspartate Transcarbamoylase Q137A Mutant in The R-State

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	34280.1	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	A, C	N-(PHOSPHONACETYL)-L-ASPARTIC ACID	non-polymer		255.1	2	Chemie (PAL)
4	B, D	ZINC ION	non-polymer		65.4	2	Chemie (ZN)
5		water	water		18.0	116	Chemie (HOH)

Sequence modifications

A, C: 1 - 310 (UniProt: P0A786)

PDB	External Database	Details
Ala 137	Gln 137	engineered mutation

B, D: 2 - 153 (UniProt: P0A7F3)

PDB	External Database	Details
Met 1	-	initiating methionine

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	102847.4
Non-Polymers*	Number of molecules	4
	Total formula weight	641.1
All*	Total formula weight	103488.4

*Water molecules are not included.