7XN3

E.coli phosphoribosylpyrophosphate (PRPP) synthetase type B filament bound with Pi

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... (A, B, F, E, C...)	Ribose-phosphate pyrophosphokinase	polymer	321	35084.1	6	UniProt (P0A717) Pfam (PF13793) Pfam (PF14572)	Escherichia coli str. K-12 substr. MG1655	RPPK,5-phospho-D-ribosyl alpha-1-diphosphate,Phosphoribosyl diphosphate synthase,Phosphoribosyl pyrophosphate synthase,P-Rib-PP synthase,PRPP synthase,PRPPase
2	G, H, I, J, K... (A, B, F, E, C...)	PHOSPHATE ION	non-polymer		95.0	12	Chemie (PO4)
3	S, T, U, V, W... (A, B, F, E, C...)	water	water		18.0	54	Chemie (HOH)

Sequence modifications

A, B, F, E, C, D: 1 - 315 (UniProt: P0A717)

PDB	External Database	Details
His 316	-	expression tag
His 317	-	expression tag
His 318	-	expression tag
His 319	-	expression tag
His 320	-	expression tag
His 321	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	210504.5
Non-Polymers*	Number of molecules	12
	Total formula weight	1139.7
All*	Total formula weight	211644.2

*Water molecules are not included.