4PW9

Crystal structure of the electron-transfer complex formed between a sulfite dehydrogenase and a c-type cytochrome from Sinorhizobium meliloti

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Putative sulfite oxidase	polymer	369	39552.7	1	UniProt (Q92M24) Pfam (PF00174) Pfam (PF03404)	Sinorhizobium meliloti (Ensifer meliloti)
2	B (B)	Putative cytochrome C	polymer	106	11403.7	1	UniProt (Q92M25) Pfam (PF13442)	Sinorhizobium meliloti (Ensifer meliloti)
3	C (A)	(MOLYBDOPTERIN-S,S)-OXO-MOLYBDENUM	non-polymer		505.3	1	Chemie (MSS)
4	D (B)	HEME C	non-polymer		618.5	1	Chemie (HEC)
5	E, F (A, B)	water	water		18.0	63	Chemie (HOH)

Sequence modifications

A: 32 - 399 (UniProt: Q92M24)

PDB	External Database	Details
Ser 31	-	expression tag

B: 28 - 113 (UniProt: Q92M25)

PDB	External Database	Details
Met 27	-	expression tag
Asn 114	-	expression tag
Ser 115	-	expression tag
Ser 116	-	expression tag
Ser 117	-	expression tag
Val 118	-	expression tag
Asp 119	-	expression tag
Lys 120	-	expression tag
Leu 121	-	expression tag
Ala 122	-	expression tag
Ala 123	-	expression tag
Ala 124	-	expression tag
Leu 125	-	expression tag
Glu 126	-	expression tag
His 127	-	expression tag
His 128	-	expression tag
His 129	-	expression tag
His 130	-	expression tag
His 131	-	expression tag
His 132	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	50956.4
Non-Polymers*	Number of molecules	2
	Total formula weight	1123.8
All*	Total formula weight	52080.1

*Water molecules are not included.