4L63

Apo form of AB5 holotoxin

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	ECXA	polymer	266	29492.9	1	UniProt (Q8GAV4) In PDB	Escherichia coli
2	B, C, D, E, F	ECXB	polymer	112	12775.5	5	UniProt (Q8GAV3) Pfam (PF01376) In PDB	Escherichia coli
3	A	ZINC ION	non-polymer		65.4	1	Chemie (ZN)
4	B, C, D, E, F	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID	non-polymer		238.3	5	Chemie (EPE)
5		water	water		18.0	435	Chemie (HOH)

Sequence modifications

A: 21 - 285 (UniProt: Q8GAV4)

PDB	External Database	Details
Met 20	-	expression tag

B, C, D, E, F: 1 - 103 (UniProt: Q8GAV3)

PDB	External Database	Details
Met 0	-	initiating methionine
Leu 104	-	expression tag
Glu 105	-	expression tag
His 106	-	expression tag
His 107	-	expression tag
His 108	-	expression tag
His 109	-	expression tag
His 110	-	expression tag
His 111	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	93370.2
Non-Polymers*	Number of molecules	6
	Total formula weight	1256.9
All*	Total formula weight	94627.2

*Water molecules are not included.