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) PubChem (177678963) PubChem (135464200) PubChem (135533971) PubChem (138454308) PubChem (135398640) PubChem (135402036) PubChem (135449337) PubChem (135486133) PubChem (135530792) PubChem (135567013) PubChem (135705234) PubChem (135854804) PubChem (135889742) PubChem (136026456) PubChem (136073920) PubChem (136217866) PubChem (136259539) PubChem (136716177) PubChem (136766861) PubChem (136811071) PubChem (137162990) PubChem (137168789) PubChem (137257909) PubChem (162510533) PubChem (174152734)
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.