4L73

Ca2+-bound MthK RCK domain at 2.5 Angstrom

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Calcium-gated potassium channel MthK	polymer	242	26887.6	2	UniProt (O27564) Pfam (PF02254) Pfam (PF02080) In PDB	Methanothermobacter thermautotrophicus
2	A, B	CALCIUM ION	non-polymer		40.1	5	Chemie (CA)
3	A, B	SODIUM ION	non-polymer		23.0	8	Chemie (NA)
4	B	CHLORIDE ION	non-polymer		35.5	1	Chemie (CL)
5		water	water		18.0	95	Chemie (HOH)

Sequence modifications

A, B: 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	2
	Total formula weight	53775.2
Non-Polymers*	Number of molecules	14
	Total formula weight	419.8
All*	Total formula weight	54195.0

*Water molecules are not included.