3FEW

Structure and Function of Colicin S4, a colicin with a duplicated receptor binding domain

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (X)	Colicin S4	polymer	505	54977.1	1	UniProt (Q9XB47) Pfam (PF22512) Pfam (PF01024)	Escherichia coli
2	B (X)	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
3	C (X)	water	water		18.0	200	Chemie (HOH)

Sequence modifications

X: 1 - 499 (UniProt: Q9XB47)

PDB	External Database	Details
His 500	-	expression tag
His 501	-	expression tag
His 502	-	expression tag
His 503	-	expression tag
His 504	-	expression tag
His 505	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	54977.1
Non-Polymers*	Number of molecules	1
	Total formula weight	23.0
All*	Total formula weight	55000.1

*Water molecules are not included.