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) Pfam (PF00148)	Azotobacter vinelandii	Dinitrogenase,Nitrogenase component I
2	B, D (B, D)	Nitrogenase molybdenum-iron protein beta chain	polymer	522	59404.7	2	UniProt (P07329) Pfam (PF11844) Pfam (PF00148)	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) Pfam (PF00142)	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)
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)
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)
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)
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.