4WZA

Asymmetric Nucleotide Binding in the Nitrogenase Complex

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C (A, C)	Nitrogenase molybdenum-iron protein alpha chain	polymer	477	53999.6	2	UniProt (P07328)	Azotobacter vinelandii	Dinitrogenase,Nitrogenase component I
2	B, D (B, D)	Nitrogenase molybdenum-iron protein beta chain	polymer	522	59404.7	2	UniProt (P07329)	Azotobacter vinelandii	Dinitrogenase,Nitrogenase component I
3	E, F, G, H (E, F, G, H)	Nitrogenase iron protein 1	polymer	276	30028.6	4	UniProt (P00459)	Azotobacter vinelandii	Nitrogenase Fe protein 1,Nitrogenase component II,Nitrogenase reductase
4	I, M (A, C)	3-HYDROXY-3-CARBOXY-ADIPIC ACID	non-polymer		206.2	2	Chemie (HCA) PubChem (28371) PubChem (439459) PubChem (11665616)
5	J, N (A, C)	iron-sulfur-molybdenum cluster with interstitial carbon	non-polymer		787.5	2	Chemie (ICS)
6	K, O (A, C)	FE(8)-S(7) CLUSTER	non-polymer		671.2	2	Chemie (CLF)
7	L, P (B, D)	FE (III) ION	non-polymer		55.8	2	Chemie (FE) PubChem (29936)
8	Q, V (E, G)	IRON/SULFUR CLUSTER	non-polymer		351.6	2	Chemie (SF4)
9	R, T, W, Y (E, F, G, H)	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG) PubChem (888)
10	S, X (E, G)	ADENOSINE-5'-DIPHOSPHATE	non-polymer		427.2	2	Chemie (ADP)
11	U, Z (F, H)	PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER	non-polymer		505.2	2	Chemie (ACP) PubChem (4799) PubChem (46936826) PubChem (91532) PubChem (91885473) PubChem (157749842) PubChem (134943439) PubChem (157749839)
12	AA, BA, CA, DA, EA... (A, B, C, D, E...)	water	water		18.0	2198	Chemie (HOH)

Sequence modifications

A, C: 4 - 480 (UniProt: P07328)

PDB	External Database	Details
Gln 440	Glu 440	variant

Contents of the asymmetric unit

Polymers	Number of chains	8
	Total formula weight	346922.9
Non-Polymers*	Number of molecules	18
	Total formula weight	6106.6
All*	Total formula weight	353029.5

*Water molecules are not included.