1N3T

Biosynthesis of pteridins. Reaction mechanism of GTP cyclohydrolase I

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	F, G, H, I, J...	GTP cyclohydrolase I	polymer	221	24717.4	15	UniProt (P0A6T5) Pfam (PF01227) In PDB	Escherichia coli
2	B, C, D, E, F...	GUANOSINE-5'-TRIPHOSPHATE	non-polymer		523.2	15	Chemie (GTP)

Sequence modifications

F, G, H, I, J, K, L, M, N, O, A, B, C, D, E: 1 - 221 (UniProt: P0A6T5)

PDB	External Database	Details
Ser 181	Cys 181	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	15
	Total formula weight	370760.8
Non-Polymers*	Number of molecules	15
	Total formula weight	7847.7
All*	Total formula weight	378608.5

*Water molecules are not included.