6YEC

E.coli's Putrescine receptor PotF complexed with Spermine

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (B, A)	Putrescine-binding periplasmic protein	polymer	352	39370.5	2	UniProt (P31133) Pfam (PF13416)	Escherichia coli K12
2	C, V (B, A)	SPERMINE	non-polymer		202.3	2	Chemie (SPM)
3	D, E, F, G, H... (B, A)	1,2-ETHANEDIOL	non-polymer		62.1	15	Chemie (EDO)
4	BA, I (A, B)	DI(HYDROXYETHYL)ETHER	non-polymer		106.1	2	Chemie (PEG)
5	AA, J (A, B)	TRIETHYLENE GLYCOL	non-polymer		150.2	2	Chemie (PGE)
6	CA, DA, K, L, M (A, B)	SULFATE ION	non-polymer		96.1	5	Chemie (SO4)
7	EA, FA, GA, N, O... (A, B)	CHLORIDE ION	non-polymer		35.5	7	Chemie (CL)
8	W (A)	GLYCEROL	non-polymer		92.1	1	Chemie (GOL)
9	Z (A)	TETRAETHYLENE GLYCOL	non-polymer		194.2	1	Chemie (PG4)
10	LA, MA (B, A)	water	water		18.0	142	Chemie (HOH)

Sequence modifications

B, A: 27 - 370 (UniProt: P31133)

PDB	External Database	Details
Leu 371	-	expression tag
Glu 372	-	expression tag
His 373	-	expression tag
His 374	-	expression tag
His 375	-	expression tag
His 376	-	expression tag
His 377	-	expression tag
His 378	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	78741.1
Non-Polymers*	Number of molecules	35
	Total formula weight	2863.1
All*	Total formula weight	81604.2

*Water molecules are not included.