6YE8

E.coli's Putrescine receptor PotF complexed with Spermidine

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)	Putrescine-binding periplasmic protein	polymer	352	39370.5	2	UniProt (P31133) Pfam (PF13416)	Escherichia coli K-12
2	C, I (A, B)	SPERMIDINE	non-polymer		145.2	2	Chemie (SPD)
3	D, F, G, J, K... (A, B)	(2R)-1-methoxypropan-2-amine	non-polymer		89.1	7	Chemie (JFN)
4	E, L (A, B)	(2~{S})-1-(2-methoxyethoxy)propan-2-amine	non-polymer		133.2	2	Chemie (ONT)
5	H, P (A, B)	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
6	O (B)	SULFATE ION	non-polymer		96.1	1	Chemie (SO4)
7	Q, R (A, B)	water	water		18.0	599	Chemie (HOH)

Sequence modifications

A, B: 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	14
	Total formula weight	1347.8
All*	Total formula weight	80088.9

*Water molecules are not included.