Uniprot accession / id : Q08460  OR   Uniprot accession / id : Q12791  OR   Uniprot accession / id : B7ZMF5  OR   Uniprot accession / id : H0Y382
 
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Entry Information
Entry status  (1)
REL
(35)
 
Experimental methods  (3)
Electron Microscopy
(31)
X-ray diffraction
(3)
Solution NMR
(1)
 
Authors  (57)
Accardi A
(8)
Agarwal S
(8)
Kim ED
(8)
Lee S
(8)
MacKinnon R
(8)
Nimigean C
(8)
Nimigean CM
(8)
Simon A
(8)
Nureki O
(7)
Tao X
(7)
Yamanouchi D
(7)
Chowdhury S
(5)
Pal K
(5)
Kallure GS
(4)
Jin MS
(3)
Kim S
(3)
Lee N
(3)
Lee NY
(3)
Park CS
(3)
Zhao C
(3)
Kallure G
(2)
Kim HJ
(2)
Kim YC
(2)
Kim YG
(2)
Lee EY
(2)
Park S
(2)
Park SB
(2)
Roh EC
(2)
Yuan P
(2)
Ahn JH
(1)
Budelli G
(1)
Butler A
(1)
Cui J
(1)
Deng Z
(1)
Geng Y
(1)
Hsiung Y
(1)
Jeong P
(1)
Jiang Y
(1)
Jo H
(1)
Leonetti MD
(1)
Lind J
(1)
Magleby KL
(1)
Maler L
(1)
Mäler L
(1)
Pagire HS
(1)
Pagire SH
(1)
Papadopoulos E
(1)
Pico AR
(1)
Salkoff L
(1)
Tonggu L
(1)
Unnerstale S
(1)
Unnerståle S
(1)
Wang L
(1)
Wu Y
(1)
Yang Y
(1)
Ye S
(1)
Zhang G
(1)
 
Homo / hetero assembly  (2)
homo
(18)
hetero
(17)
 
Assembly composition  (2)
protein structure
(18)
protein/protein complex
(17)
 
Assembly polymer count  (4)
octamer
(16)
tetramer
(15)
monomer
(3)
dimer
(1)
 
Resolution distribution
1.5 - 2
(1)
2.0 - 2.5
(1)
2.5 - 3
(12)
3.0 - 3.5
(11)
3.5 - 4
(9)
 
Release year distribution
2005 - 2010
(3)
2010 - 2015
(2)
2015 - 2020
(6)
2020 - 2025
(28)
2025 - 2030
(10)
 
Journal  (9)
To be published
(13)
Nat Commun
(8)
Elife
(4)
Proc Natl Acad Sci U S A
(4)
J Med Chem
(2)
Biochemistry
(1)
Life Sci Alliance
(1)
Nature
(1)
Science
(1)
 
Macromolecules
Organism superkingdom  (1)
Eukaryota
(35)
 
Organism name  (1)
Homo sapiens
(35)
 
Molecule name  (13)
BK channel
(35)
BKCA alpha
(35)
Calcium-activated potassium channel subunit alpha-1
(35)
Calcium-activated potassium channel, subfamily M subunit alpha-1
(35)
K(VCA)alpha
(35)
KCa1.1
(35)
Maxi K channel
(35)
MaxiK
(35)
Slo homolog
(35)
Slo-alpha
(35)
Slo1
(35)
Slowpoke homolog
(35)
hSlo
(35)
 
Molecule type  (1)
Protein
(35)
 
Gene names  (3)
KCNMA
(35)
KCNMA1
(35)
SLO
(35)
 
Interacting Molecules  (3)
Calcium-activated potassium channel subunit beta-4
(10)
KCNMB2 ball/chain domain-containing protein
(8)
Leucine-rich repeat-containing protein 26
(7)
 
Interacting ligands  (13)
CA : CALCIUM ION
(19)
K : POTASSIUM ION
(16)
CLR : CHOLESTEROL
(14)
MG : MAGNESIUM ION
(14)
POV : (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
(14)
AJP : Digitonin
(4)
Y01 : CHOLESTEROL HEMISUCCINATE
(3)
PGW : (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate
(2)
SO4 : SULFATE ION
(2)
A1L04 : 4-[4-(4-chlorophenyl)-3-(trifluoromethyl)-1,2-oxazol-5-yl]benzene-1,3-diol
(1)
A1L4E : 5-azanyl-2-[2,3,5,6-tetrakis(fluoranyl)-4-(trifluoromethyl)phenoxy]phenol
(1)
A1L4F : 5-(5-morpholin-4-ylpentylamino)-2-[2,3,5,6-tetrakis(fluoranyl)-4-(trifluoromethyl)phenoxy]phenol
(1)
NA : SODIUM ION
(1)
 
Function and Biology
Biological function  (9)
monoatomic ion channel activity
(15)
actin binding
(3)
calcium-activated potassium channel activity
(3)
large conductance calcium-activated potassium channel activity
(3)
metal ion binding
(3)
potassium channel activity
(3)
protein binding
(3)
voltage-gated potassium channel activity
(3)
DNA-binding transcription factor activity
(1)
 
Biological process  (17)
potassium ion transport
(21)
monoatomic ion transport
(17)
transmembrane transport
(15)
intracellular potassium ion homeostasis
(3)
micturition
(3)
monoatomic ion transmembrane transport
(3)
negative regulation of cell volume
(3)
positive regulation of apoptotic process
(3)
potassium ion transmembrane transport
(3)
regulation of membrane potential
(3)
response to calcium ion
(3)
response to carbon monoxide
(3)
response to hypoxia
(3)
response to osmotic stress
(3)
smooth muscle contraction involved in micturition
(3)
vasodilation
(3)
regulation of DNA-templated transcription
(1)
 
Biological cell component  (7)
membrane
(21)
apical plasma membrane
(3)
caveola
(3)
monoatomic ion channel complex
(3)
plasma membrane
(3)
postsynaptic membrane
(3)
voltage-gated potassium channel complex
(3)
 
Sequence and Structure classification
Pfam accession / name  (5)
PF03493 : BK_channel_a
(34)
PF21014 : Slowpoke_C
(34)
PF22614 : Slo-like_RCK
(34)
PF00520 : Ion_trans
(31)
PF07885 : Ion_trans_2
(31)
 
Experimental Information
Diffraction protocol  (2)
Single wavelength
(3)
MAD
(1)
 
Diffraction radiation source type  (1)
Synchrotron
(3)
 
Diffraction source  (4)
APS BEAMLINE 24-ID-C
(2)
APS BEAMLINE 23-ID-B
(1)
APS BEAMLINE 23-ID-D
(1)
NSLS BEAMLINE X29A
(1)
 
Synchrotron site  (2)
APS
(3)
NSLS
(1)
 
Diffraction detector type  (3)
CCD
(2)
Image plate
(1)
Pixel
(1)
 
Refinement software  (2)
PHENIX
(7)
REFMAC
(2)
 
EM microscope model  (2)
FEI TITAN KRIOS
(25)
TFS KRIOS
(6)
 
EM detector name  (4)
GATAN K3 (6k x 4k)
(14)
GATAN K3 BIOQUANTUM (6k x 4k)
(11)
GATAN K2 SUMMIT (4k x 4k)
(5)
FEI FALCON IV (4k x 4k)
(1)
 
NMR
NMR software packages  (5)
CYANA
(1)
NMRDraw
(1)
PROCHECK / PROCHECK-NMR
(1)
Sparky
(1)
VNMR
(1)
 
NMR Field Strength
700.0 - 800
(1)
800.0 - 900
(1)
 
Representative Structures
Representative Structures
100%
95%
90%
70%
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30%
Entries 1 to 10 of 35
Entries 1 to 10 of 35
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Cryo-EM structure of hSlo1 in digitonin, Ca2+-free and EDTA-free
Tao X, Zhao C, MacKinnon R
Proc Natl Acad Sci U S A (2023) [PMID: 37098056  ]
Source organism: Homo sapiens  
Assembly composition: protein only structure
Assembly name: Calcium-activated potassium channel subunit alpha-1 (Preferred)   search this complex
PDBe complex ID: PDB-CPX-171393 (Preferred)   search this ID
PDBe-KB: Q12791    Q12791   
Electron Microscopy
3.3Å resolution
Released: 10 May 2023
Model geometry
Fit model/data
Data not analysed
8ghg
8ghg
8ghg
RCK1-RCK2 double mutant of human Slo1 in presence of EDTA - resting VSD
Pal K, Kallure GS, Chowdhury S
To be published
Source organism: Homo sapiens  
Assembly composition: protein only structure
Bound ligands: CLR    K    K    CLR    POV    POV    AJP    AJP   
Assembly name: Calcium-activated potassium channel subunit alpha-1 (Preferred)   search this complex
PDBe complex ID: PDB-CPX-171393 (Preferred)   search this ID
PDBe-KB: Q12791    Q12791   
Electron Microscopy
2.6Å resolution
Released: 11 Dec 2024
Model geometry
Fit model/data
Data not analysed
8v64
8v64
8v64
Ca2+ bound intermediate state of hSlo1 + beta2N-beta4 channel in nanodisc.
Agarwal S, Nimigean C
Nat Commun (2025) [PMID: 39971906  ]
Source organism: Homo sapiens  
Assembly composition: protein/protein complex
Bound ligands: K    CA    K    CA    POV    POV   
Assembly name: Calcium-activated potassium channel (Preferred)   search this complex
PDBe complex ID: PDB-CPX-286942 (Preferred)   search this ID
PDBe-KB: Q12791    B5BNX0    Q12791    Q86W47   
Electron Microscopy
2.87Å resolution
Released: 5 Mar 2025
Model geometry
Fit model/data
Data not analysed
9czo
9czo
9czo
Ca2+ free hSlo1 + beta2N-beta4 channel in nanodisc.
Agarwal S, Nimigean C
Nat Commun (2025) [PMID: 39971906  ]
Source organism: Homo sapiens  
Assembly composition: protein/protein complex
Bound ligands: CLR    K    K    CLR    POV    POV   
Assembly name: Calcium-activated potassium channel (Preferred)   search this complex
PDBe complex ID: PDB-CPX-286942 (Preferred)   search this ID
PDBe-KB: Q12791    B5BNX0    Q12791    Q86W47   
Electron Microscopy
3.5Å resolution
Released: 5 Mar 2025
Model geometry
Fit model/data
Data not analysed
9czk
9czk
9czk
R207A mutant of human Slo1 in presence of EDTA - activated VSD
Pal K, Kallure GS, Chowdhury S
To be published
Source organism: Homo sapiens  
Assembly composition: protein only structure
Bound ligands: CLR    K    K    CLR    POV    POV    AJP    AJP   
Assembly name: Calcium-activated potassium channel subunit alpha-1 (Preferred)   search this complex
PDBe complex ID: PDB-CPX-171393 (Preferred)   search this ID
PDBe-KB: Q12791    Q12791   
Electron Microscopy
2.72Å resolution
Released: 11 Dec 2024
Model geometry
Fit model/data
Data not analysed
8v63
8v63
8v63
Structure of human Slo1 and human LRRC26 in EDTA - LRRD masked
Pal K, Kallure GS, Chowdhury S
To be published
Source organism: Homo sapiens  
Assembly composition: protein/protein complex
Bound ligands: K    K   
Assembly name: Leucine-rich repeat-containing protein 26 and Calcium-activated potassium channel subunit alpha-1 (Preferred)   search this complex
PDBe complex ID: PDB-CPX-245863 (Preferred)   search this ID
PDBe-KB: Q12791    Q2I0M4    Q12791   
Electron Microscopy
2.82Å resolution
Released: 25 Dec 2024
Model geometry
Fit model/data
Data not analysed
8vaz
8vaz
8vaz
F315A mutant of human Slo1 in presence of EDTA - resting VSD
Pal K, Kallure G, Chowdhury S
To be published
Source organism: Homo sapiens  
Assembly composition: protein only structure
Bound ligands: CLR    K    K    CLR    POV    POV    AJP    AJP   
Assembly name: Calcium-activated potassium channel subunit alpha-1 (Preferred)   search this complex
PDBe complex ID: PDB-CPX-171393 (Preferred)   search this ID
PDBe-KB: Q12791    Q12791   
Electron Microscopy
2.43Å resolution
Released: 11 Dec 2024
Model geometry
Fit model/data
Data not analysed
8v60
8v60
8v60
Human Slo1 - human LRRC26 in presence of EDTA - GR masked
Pal K, Kallure GS, Chowdhury S
To be published
Source organism: Homo sapiens  
Assembly composition: protein/protein complex
Bound ligands: CLR    K    K    NAG    CLR    POV    POV    AJP    NAG    AJP   
Assembly name: Leucine-rich repeat-containing protein 26 and Calcium-activated potassium channel subunit alpha-1 (Preferred)   search this complex
PDBe complex ID: PDB-CPX-245863 (Preferred)   search this ID
PDBe-KB: Q12791    Q2I0M4    Q12791   
Electron Microscopy
3.13Å resolution
Released: 25 Dec 2024
Model geometry
Fit model/data
Data not analysed
8vav
8vav
8vav
Ca2+ bound open-inactivated hSlo1 + beta2N-beta4 channel in nanodisc.
Agarwal S, Nimigean C
Nat Commun (2025) [PMID: 39971906  ]
Source organism: Homo sapiens  
Assembly composition: protein/protein complex
Bound ligands: CLR    K    CA    K    MG    CA    CLR    POV    POV    MG   
Assembly name: Calcium-activated potassium channel (Preferred)   search this complex
PDBe complex ID: PDB-CPX-286942 (Preferred)   search this ID
PDBe-KB: Q12791    B5BNX0    Q12791    Q86W47   
Electron Microscopy
2.57Å resolution
Released: 5 Mar 2025
Model geometry
Fit model/data
Data not analysed
9czm
9czm
9czm
Ca2+ free hSlo1 + beta2N-beta4 channel in detergent.
Agarwal S, Nimigean C
Nat Commun (2025) [PMID: 39971906  ]
Source organism: Homo sapiens  
Assembly composition: protein/protein complex
Bound ligands: CLR    K    K    CLR   
Assembly name: Calcium-activated potassium channel (Preferred)   search this complex
PDBe complex ID: PDB-CPX-286942 (Preferred)   search this ID
PDBe-KB: Q12791    B5BNX0    Q12791    Q86W47   
Electron Microscopy
3.54Å resolution
Released: 5 Mar 2025
Model geometry
Fit model/data
Data not analysed
9czj
9czj
9czj
Entries 1 to 10 of 35
Entries 1 to 10 of 35