6UYK

Dark-operative protochlorophyllide oxidoreductase in the nucleotide-free form.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	Light-independent protochlorophyllide reductase iron-sulfur ATP-binding protein	polymer	318	34850.3	4	UniProt (Q9RFD6) Pfam (PF00142)	Rhodobacter sphaeroides	LI-POR subunit L
2	E, G (A, C)	IRON/SULFUR CLUSTER	non-polymer		351.6	2	Chemie (SF4)
3	F, H (B, C)	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
4	I (B)	water	water		18.0	1	Chemie (HOH)

Sequence modifications

A, B, C, D: 1 - 297 (UniProt: Q9RFD6)

PDB	External Database	Details
Met -20	-	initiating methionine
Gly -19	-	expression tag
Ser -18	-	expression tag
Ser -17	-	expression tag
His -16	-	expression tag
His -15	-	expression tag
His -14	-	expression tag
His -13	-	expression tag
His -12	-	expression tag
His -11	-	expression tag
Ser -10	-	expression tag
Gln -9	-	expression tag
Asp -8	-	expression tag
Pro -7	-	expression tag
Glu -6	-	expression tag
Asn -5	-	expression tag
Leu -4	-	expression tag
Tyr -3	-	expression tag
Phe -2	-	expression tag
Gln -1	-	expression tag
Ser 0	-	expression tag
Glu 289	Asp 289	variant

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	139401.4
Non-Polymers*	Number of molecules	4
	Total formula weight	774.2
All*	Total formula weight	140175.5

*Water molecules are not included.