4EI2

Crystal Structures of MthK RCK gating ring bound to Barium

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E... (A, B, C, D, E...)	Calcium-gated potassium channel mthK	polymer	242	26887.6	16	UniProt (O27564) Pfam (PF02254) Pfam (PF02080)	Methanothermobacter thermautotrophicus
2	AA, AB, BA, BB, CA... (C, J, D, K, L...)	BARIUM ION	non-polymer		137.3	57	Chemie (BA)
3	AC, BC, CC, DC, EC... (F, G, H, J, M...)	water	water		18.0	32	Chemie (HOH)

Sequence modifications

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P: 107 - 336 (UniProt: O27564)

PDB	External Database	Details
Leu 337	-	expression tag
Val 338	-	expression tag
Pro 339	-	expression tag
Arg 340	-	expression tag
Gly 341	-	expression tag
Ser 342	-	expression tag
His 343	-	expression tag
His 344	-	expression tag
His 345	-	expression tag
His 346	-	expression tag
His 347	-	expression tag
His 348	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	16
	Total formula weight	430201.5
Non-Polymers*	Number of molecules	57
	Total formula weight	7827.6
All*	Total formula weight	438029.1

*Water molecules are not included.