2PQM

Crystal structure of Cysteine Synthase (OASS) from Entamoeba histolytica at 1.86 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, B (A, B)	Cysteine synthase	polymer	343	37599.4	2	UniProt (O15570) Pfam (PF00291)	Entamoeba histolytica
2	C, E (A, B)	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3	D, F (A, B)	PYRIDOXAL-5'-PHOSPHATE	non-polymer		247.1	2	Chemie (PLP)
4	G, H (A, B)	water	water		18.0	356	Chemie (HOH)

Sequence modifications

A, B: 1 - 337 (UniProt: O15570)

PDB	External Database	Details
His 338	-	expression tag
His 339	-	expression tag
His 340	-	expression tag
His 341	-	expression tag
His 342	-	expression tag
His 343	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	75198.7
Non-Polymers*	Number of molecules	4
	Total formula weight	686.4
All*	Total formula weight	75885.1

*Water molecules are not included.