3SQG

Crystal structure of a methyl-coenzyme M reductase purified from Black Sea mats

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D, G	Methyl coenzyme M reductase, alpha subunit	polymer	579	63862.9	3	UniProt (D1JBK4) Pfam (PF02745) Pfam (PF02249) In PDB	uncultured archaeon
2	B, E, H	Methyl-coenzyme M reductase, beta subunit	polymer	433	46030.0	3	UniProt (D1JBK2) Pfam (PF02783) Pfam (PF02241) In PDB	uncultured archaeon
3	C, F, I	Methyl-coenzyme M reductase, gamma subunit	polymer	279	31577.0	3	UniProt (D1JBK3) Pfam (PF02240) In PDB	uncultured archaeon
4	A, G	Coenzyme B	non-polymer		343.3	3	Chemie (TP7)
5	D, A, G	1-THIOETHANESULFONIC ACID	non-polymer		142.2	3	Chemie (COM)
6	G, A, D	(17[2]S)-17[2]-methylthio-coenzyme F43	non-polymer		952.7	3	Chemie (M43)
7	D, E, F, G, A...	PENTAETHYLENE GLYCOL	non-polymer		238.3	6	Chemie (1PE)
8	D, G, A	TRIETHYLENE GLYCOL	non-polymer		150.2	6	Chemie (PGE)
9	D, A, H, I, B...	SULFATE ION	non-polymer		96.1	9	Chemie (SO4)
10	A	CHLORIDE ION	non-polymer		35.5	1	Chemie (CL)
11	G, A	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
12	B	HEXAETHYLENE GLYCOL	non-polymer		282.3	1	Chemie (P6G)
13	E, C	GLYCEROL	non-polymer		92.1	2	Chemie (GOL)
14		water	water		18.0	2005	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	9
	Total formula weight	424409.6
Non-Polymers*	Number of molecules	36
	Total formula weight	8092.0
All*	Total formula weight	432501.6

*Water molecules are not included.