6HMW

Cholera toxin classical B-pentamer in complex with fucose

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, E...	Cholera enterotoxin B-subunit	polymer	103	11623.3	10	UniProt (Q57193) Pfam (PF01376) UniProt (by SIFTS) (P01556) In PDB	Vibrio cholerae	Cholera enterotoxin subunit B,Cholera toxin B protein (CTB),Cholera toxin B subunit,Cholera toxin beta subunit,Cholera toxin subunit B,Cholerae toxin B subunit,CtxB
2	D, E, A, B, C	CALCIUM ION	non-polymer		40.1	10	Chemie (CA)
3	C, D, E, A, B	BICINE	non-polymer		163.2	10	Chemie (BCN)
4	D, E, A, F, G...	beta-L-fucopyranose	non-polymer		164.2	16	Chemie (FUL)
5		water	water		18.0	261	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	10
	Total formula weight	116232.7
Non-Polymers*	Number of molecules	36
	Total formula weight	4659.0
All*	Total formula weight	120891.7

*Water molecules are not included.