Annotations: 6CNM

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Small-conductance Ca-activated potassium (SK) channel	8093289	4007802	SCOP2 (2022-06-29)
A	SCOP2 Family	Small-conductance potassium channel gating domain	8093287	4001868	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Voltage-gated potassium channels	8093290	3000023	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Calmodulin binding domain (CaMBD)-like	8093288	3002034	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Voltage-gated potassium channels	8093290	3000023	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Calmodulin binding domain (CaMBD)-like	8093288	3002034	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Voltage-gated potassium channels	8093290	3000023	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Calmodulin binding domain (CaMBD)-like	8093288	3002034	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Voltage-gated potassium channels	8093290	3000023	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Calmodulin binding domain (CaMBD)-like	8093288	3002034	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	EF-hand	8033438	3001983	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	EF-hand	8033438	3001983	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	EF-hand	8033438	3001983	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	EF-hand	8033438	3001983	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H	EF-hand_7_8	e6cnmH1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
E	EF-hand_7_8	e6cnmE1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
F	EF-hand_7_8	e6cnmF1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
G	EF-hand_7_8	e6cnmG1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Identifier	Description	Comments	Source
A, B, C, D	PF02888	Calmodulin binding domain (CaMBD)	Calmodulin binding domain	-	Family
A, B, C, D	PF03530	Calcium-activated SK potassium channel (SK_channel)	Calcium-activated SK potassium channel	-	Family
A, B, C, D	PF07885	Ion channel (Ion_trans_2)	Ion channel	-	Family
E, F, G, H	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair	-	Domain

Gene Product Annotation Gene Product Annotation

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Intermediate conductance calcium-activated potassium channel protein 4	transporter activity monoatomic ion channel activity calcium activated cation channel activity monoatomic cation channel activity potassium channel activity monoatomic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity potassium ion transmembrane transporter activity channel activity calcium-activated potassium channel activity inorganic molecular entity transmembrane transporter activity passive transmembrane transporter activity gated channel activity monoatomic ion gated channel activity transmembrane transporter activity inorganic cation transmembrane transporter activity metal ion transmembrane transporter activity salt transmembrane transporter activity binding protein binding calmodulin binding Intermediate conductance calcium-activated potassium channel activity enzyme binding phosphatase binding protein phosphatase binding small conductance calcium-activated potassium channel activity	cellular process localization establishment of localization cellular localization establishment of localization in cell stabilization of membrane potential regulation of membrane potential biological regulation regulation of biological quality	intracellular anatomical structure cytoplasm cytosol cellular anatomical entity cell projection neuron projection plasma membrane bounded cell projection somatodendritic compartment neuronal cell body cell body plasma membrane membrane cell periphery vesicle organelle membrane-bounded organelle voltage-gated potassium channel complex protein-containing complex monoatomic ion channel complex cation channel complex potassium channel complex membrane protein complex plasma membrane protein complex transmembrane transporter complex transporter complex
E, F, G, H	Calmodulin-1	enzyme activator activity cyclase regulator activity cyclase activator activity adenylate cyclase regulator activity adenylate cyclase activator activity enzyme regulator activity molecular function regulator activity molecular function activator activity binding protein binding adenylate cyclase binding enzyme binding calcium channel regulator activity ion channel inhibitor activity channel regulator activity channel inhibitor activity calcium channel inhibitor activity ion channel regulator activity molecular function inhibitor activity calcium ion binding ion binding cation binding metal ion binding calcium-dependent protein binding protein domain specific binding disordered domain specific binding kinase binding protein kinase binding phosphatase regulator activity phosphatase activator activity protein phosphatase regulator activity protein phosphatase activator activity kinase regulator activity kinase activator activity protein kinase regulator activity protein kinase activator activity protein serine/threonine kinase activator activity cytoskeletal protein binding titin binding transmembrane transporter binding	cellular process cellular component organization membrane docking localization organelle localization cellular component organization or biogenesis organelle localization by membrane tethering mitochondrion-endoplasmic reticulum membrane tethering positive regulation of catalytic activity positive regulation of molecular function regulation of catalytic activity regulation of hydrolase activity regulation of cyclic-nucleotide phosphodiesterase activity positive regulation of cyclic-nucleotide phosphodiesterase activity positive regulation of hydrolase activity biological regulation regulation of molecular function positive regulation of DNA binding regulation of binding positive regulation of binding regulation of DNA binding response to organic substance response to inorganic substance response to metal ion response to chemical response to stimulus response to calcium ion response to oxygen-containing compound response to salt	membrane protein-containing complex monoatomic ion channel complex cation channel complex calcium channel complex membrane protein complex cellular anatomical entity transmembrane transporter complex transporter complex catalytic complex intracellular anatomical structure centrosome microtubule organizing center cytoskeleton microtubule cytoskeleton organelle non-membrane-bounded organelle intracellular organelle intracellular non-membrane-bounded organelle cytoplasm cytosol extracellular region myelin sheath nucleus nucleoplasm membrane-enclosed lumen nuclear lumen membrane-bounded organelle intracellular membrane-bounded organelle organelle lumen intracellular organelle lumen plasma membrane cell periphery myofibril sarcomere contractile fiber supramolecular complex supramolecular polymer supramolecular fiber cilium motile cilium sperm flagellum cell projection sperm midpiece 9+2 motile cilium plasma membrane bounded cell projection spindle microtubule spindle microtubule polymeric cytoskeletal fiber vesicle voltage-gated potassium channel complex potassium channel complex plasma membrane protein complex

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	Calcium-activated SK potassium channel

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	small-conductance Ca²⁺-activated K⁺ (SK) channel calmodulin complex, Ca- bound state I

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.