4L76

Ca2+-bound E212Q mutant MthK RCK domain

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...	Calcium-gated potassium channel MthK	polymer	242	26886.6	6	UniProt (O27564) Pfam (PF02254) Pfam (PF02080) In PDB	Methanothermobacter thermautotrophicus
2	A, B, C, D, E...	CALCIUM ION	non-polymer		40.1	13	Chemie (CA)
3	B, D	SODIUM ION	non-polymer		23.0	2	Chemie (NA)
4		water	water		18.0	1	Chemie (HOH)

Sequence modifications

A, B, C, D, E, F: 107 - 336 (UniProt: O27564)

PDB	External Database	Details
Gln 212	Glu 212	engineered mutation
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	6
	Total formula weight	161319.6
Non-Polymers*	Number of molecules	15
	Total formula weight	567.0
All*	Total formula weight	161886.6

*Water molecules are not included.