4GNW

Crystal structure of nitrophorin 4 triple mutant complex with ammonia

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Nitrophorin-4	polymer	184	20289.7	2	UniProt (Q94734) Pfam (PF02087) In PDB	Rhodnius prolixus (Triatomid bug)	NP4
2	A, B	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	2	Chemie (HEM)
3	A, B	AMMONIA	non-polymer		17.0	2	Chemie (NH3)
4	A, B	PHOSPHATE ION	non-polymer		95.0	2	Chemie (PO4)
5		water	water		18.0	449	Chemie (HOH)

Sequence modifications

A, B: 1 - 184 (UniProt: Q94734)

PDB	External Database	Details
Asn 30	Asp 51	engineered mutation
Gln 32	Glu 53	engineered mutation
Asn 35	Asp 56	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	40579.4
Non-Polymers*	Number of molecules	6
	Total formula weight	1457.0
All*	Total formula weight	42036.4

*Water molecules are not included.