2NTK

Crystal structure of PurO/IMP from Methanothermobacter thermoautotrophicus

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 (A, B, C, D)	IMP cyclohydrolase	polymer	222	24030.8	4	UniProt (O27099) Pfam (PF07826)	Methanothermobacter thermautotrophicus	Inosinicase, IMP synthetase
2	E, F, G, H (A, B, C, D)	INOSINIC ACID	non-polymer		348.2	4	Chemie (IMP)
3	I, J, K, L (A, B, C, D)	water	water		18.0	200	Chemie (HOH)

Sequence modifications

A, B, C, D: 1 - 202 (UniProt: O27099)

PDB	External Database	Details
Met -19	-	cloning artifact
Gly -18	-	cloning artifact
Ser -17	-	cloning artifact
Ser -16	-	cloning artifact
His -15	-	expression tag
His -14	-	expression tag
His -13	-	expression tag
His -12	-	expression tag
His -11	-	expression tag
His -10	-	expression tag
Ser -9	-	cloning artifact
Ser -8	-	cloning artifact
Gly -7	-	cloning artifact
Leu -6	-	cloning artifact
Val -5	-	cloning artifact
Pro -4	-	cloning artifact
Arg -3	-	cloning artifact
Gly -2	-	cloning artifact
Ser -1	-	cloning artifact
His 0	-	cloning artifact

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	96123.1
Non-Polymers*	Number of molecules	4
	Total formula weight	1392.8
All*	Total formula weight	97516.0

*Water molecules are not included.