1G21

MGATP-BOUND AND NUCLEOTIDE-FREE STRUCTURES OF A NITROGENASE PROTEIN COMPLEX BETWEEN LEU127DEL-FE PROTEIN AND THE MOFE PROTEIN

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	NITROGENASE MOLYBDENUM-IRON PROTEIN ALPHA CHAIN	polymer	492	55363.0	2	UniProt (P07328) Pfam (PF00148) In PDB	Azotobacter vinelandii	NITROGENASE COMPONENT I, DINITROGENASE, NIFD
2	B, D	NITROGENASE MOLYBDENUM-IRON PROTEIN BETA CHAIN	polymer	523	59535.9	2	UniProt (P07329) Pfam (PF11844) Pfam (PF00148) In PDB	Azotobacter vinelandii	NITROGENASE COMPONENT I, DINITROGENASE, NIFK
3	E, F, G, H	NITROGENASE IRON PROTEIN	polymer	289	31435.1	4	UniProt (P00459) Pfam (PF00142) In PDB	Azotobacter vinelandii	NITROGENASE COMPONENT II, NITROGENASE REDUCTASE, NIFH
4	A, C	3-HYDROXY-3-CARBOXY-ADIPIC ACID	non-polymer		206.2	2	Chemie (HCA)
5	A, C	FE-MO-S CLUSTER	non-polymer		775.4	2	Chemie (CFM)
6	A, D	FE(8)-S(7) CLUSTER	non-polymer		671.2	2	Chemie (CLF)
7	B, D	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
8	E, F, G, H	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)
9	E, F, G, H	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	4	Chemie (ATP)
10	F, G	IRON/SULFUR CLUSTER	non-polymer		351.6	2	Chemie (SF4)

Sequence modifications

E, F, G, H: 1 - 289 (UniProt: P00459)

PDB	External Database	Details
-	Leu 128	deletion

Contents of the asymmetric unit

Polymers	Number of chains	8
	Total formula weight	355538.2
Non-Polymers*	Number of molecules	18
	Total formula weight	6215.0
All*	Total formula weight	361753.2

*Water molecules are not included.