4ZBM

Crystal structure of Drosophila cyclic nucleotide gated channel pore mimicking NaK mutant

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Potassium channel protein	polymer	97	10687.6	2	UniProt (Q81HW2) Pfam (PF07885) In PDB	Bacillus cereus (strain ATCC 14579 / DSM 31)
2	A, B	POTASSIUM ION	non-polymer		39.1	5	Chemie (K)
3	A, B	BARIUM ION	non-polymer		137.3	2	Chemie (BA)
4		water	water		18.0	102	Chemie (HOH)

Sequence modifications

A, B: 20 - 109 (UniProt: Q81HW2)

PDB	External Database	Details
Met 18	-	expression tag
Ala 19	-	expression tag
-	Asp 66	SEE REMARK 999
Glu 66	Gly 67	SEE REMARK 999
Thr 67	Asn 68	SEE REMARK 999
Pro 68	Phe 69	SEE REMARK 999
Thr 69	Ser 70	SEE REMARK 999
Leu 110	-	expression tag
Val 111	-	expression tag
Pro 112	-	expression tag
Arg 113	-	expression tag
Gly 114	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	21375.2
Non-Polymers*	Number of molecules	7
	Total formula weight	470.1
All*	Total formula weight	21845.3

*Water molecules are not included.