3P6B

The crystal structure of CelK CBM4 from Clostridium thermocellum

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Cellulose 1,4-beta-cellobiosidase	polymer	205	23577.3	2	UniProt (P0C2S1) Pfam (PF02018)	Clostridium thermocellum
2	C, L (A, B)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
3	D, E, F (A)	ACETATE ION	non-polymer		59.0	3	Chemie (ACT)
4	G, M (A, B)	GLYCEROL	non-polymer		92.1	2	Chemie (GOL)
5	H, I, J, K, N... (A, B)	SULFATE ION	non-polymer		96.1	9	Chemie (SO4)
6	S, T (A, B)	water	water		18.0	346	Chemie (HOH)

Sequence modifications

A, B: 21 - 204 (UniProt: P0C2S1)

PDB	External Database	Details
Met 0	-	expression tag
Gly 1	-	expression tag
Ser 2	-	expression tag
Ser 3	-	expression tag
His 4	-	expression tag
His 5	-	expression tag
His 6	-	expression tag
His 7	-	expression tag
His 8	-	expression tag
His 9	-	expression tag
Ser 10	-	expression tag
Ser 11	-	expression tag
Gly 12	-	expression tag
Leu 13	-	expression tag
Val 14	-	expression tag
Pro 15	-	expression tag
Arg 16	-	expression tag
Gly 17	-	expression tag
Ser 18	-	expression tag
His 19	-	expression tag
Met 20	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	47154.6
Non-Polymers*	Number of molecules	16
	Total formula weight	1306.0
All*	Total formula weight	48460.6

*Water molecules are not included.