4L74

Ca2+-bound MthK RCK domain at 1.9 Angstrom with single ligand

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)	Calcium-gated potassium channel MthK	polymer	242	26887.6	2	UniProt (O27564) Pfam (PF02254) Pfam (PF02080)	Methanothermobacter thermautotrophicus
2	C, D (A, B)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
3	E, F (A, B)	water	water		18.0	370	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	2
	Total formula weight	80.2
All*	Total formula weight	53855.3

*Water molecules are not included.