3DKI

2.1 A X-ray structure of CysM (Rv1336) from Mycobacterium tuberculosis an O-phosphoserine dependent cysteine synthase

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 B	polymer	326	34952.2	2	UniProt (P63873) Pfam (PF00291) UniProt (by SIFTS) (P9WP53)	Mycobacterium tuberculosis	O-acetylserine sulfhydrylase B, CSase B, O-acetylserine (Thiol)-lyase B, CysM
2	C (B)	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
3	D, E (A, B)	water	water		18.0	219	Chemie (HOH)

Sequence modifications

A, B: 1 - 323 (UniProt: P63873)

PDB	External Database	Details
Gly -2	-	expression tag
Ser -1	-	expression tag
His 0	-	expression tag
Ala 2	Thr 2	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	69904.5
Non-Polymers*	Number of molecules	1
	Total formula weight	23.0
All*	Total formula weight	69927.5

*Water molecules are not included.