5BUT

Crystal structure of inactive conformation of KtrAB K+ transporter

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C, E, G	Ktr system potassium uptake protein A,Ktr system potassium uptake protein A	polymer	288	32038.7	4	UniProt (O32080) Pfam (PF02254) In PDB	Bacillus subtilis	K(+)-uptake protein KtrA,K(+)-uptake protein KtrA
2	I, J, K, L	Ktr system potassium uptake protein B	polymer	445	48158.0	4	UniProt (O32081) Pfam (PF02386) In PDB	Bacillus subtilis	K(+)-uptake protein KtrB
3	I, J, K, L	POTASSIUM ION	non-polymer		39.1	4	Chemie (K)

Sequence modifications

A, C, E, G: 1 - 144 (UniProt: O32080)

PDB	External Database	Details
Leu 283	-	expression tag
Glu 284	-	expression tag
Leu 285	-	expression tag
Val 286	-	expression tag
Pro 287	-	expression tag
Arg 288	-	expression tag
Val 22	Cys 22	engineered mutation

A, C, E, G: 149 - 282 (UniProt: O32080)

PDB	External Database	Details
Leu 145	-	linker
Glu 146	-	linker
Gly 147	-	linker
Ser 148	-	linker

I, J, K, L: 1 - 445 (UniProt: O32081)

PDB	External Database	Details
Ala 103	Gly 103	conflict
Ala 104	Lys 104	conflict
Ala 105	Lys 105	conflict
Gln 218	Asn 218	conflict
Ala 229	Lys 229	conflict
Ala 261	His 261	conflict
Ala 262	Ile 262	conflict
Ala 429	Lys 429	conflict

Contents of the asymmetric unit

Polymers	Number of chains	8
	Total formula weight	320787.0
Non-Polymers*	Number of molecules	4
	Total formula weight	156.4
All*	Total formula weight	320943.4

*Water molecules are not included.