InnateDB: Systems Biology of the Innate Immune Response

Homo sapiens Protein: KCNQ5

Summary

InnateDB Protein

IDBP-294167.5

Last Modified

2014-10-13 [Report errors or provide feedback]

Gene Symbol

KCNQ5

Protein Name

potassium voltage-gated channel, KQT-like subfamily, member 5

Synonyms

Species

Homo sapiens

Ensembl Protein

ENSP00000384453

InnateDB Gene

IDBG-92219 (KCNQ5)

Protein Structure

UniProt Annotation

Function

Probably important in the regulation of neuronal excitability. Associates with KCNQ3 to form a potassium channel which contributes to M-type current, a slowly activating and deactivating potassium conductance which plays a critical role in determining the subthreshold electrical excitability of neurons. May contribute, with other potassium channels, to the molecular diversity of a heterogeneous population of M-channels, varying in kinetic and pharmacological properties, which underlie this physiologically important current. Insensitive to tetraethylammonium, but inhibited by barium, linopirdine and XE991. Activated by niflumic acid and the anticonvulsant retigabine. Muscarine suppresses KCNQ5 current in Xenopus oocytes in which cloned KCNQ5 channels were coexpressed with M(1) muscarinic receptors.

Subcellular Localization

Membrane; Multi-pass membrane protein.

Disease Associations

Tissue Specificity

Strongly expressed in brain and skeletal muscle. In brain, expressed in cerebral cortex, occipital pole, frontal lobe and temporal lobe. Lower levels in hippocampus and putamen. Low to undetectable levels in medulla, cerebellum and thalamus.

Comments

Interactions

Number of Interactions

This gene and/or its encoded proteins are associated with 3 experimentally validated interaction(s) in this database.

Experimentally validated
Total	3 [view]
Protein-Protein	2 [view]
Protein-DNA	1 [view]
Protein-RNA	0
DNA-DNA	0
RNA-RNA	0
DNA-RNA	0

Gene Ontology

Molecular Function

Accession	GO Term
GO:0005216	ion channel activity
GO:0005242	inward rectifier potassium channel activity
GO:0005251	delayed rectifier potassium channel activity

Biological Process

GO:0006461	protein complex assembly
GO:0006811	ion transport
GO:0007268	synaptic transmission
GO:0034765	regulation of ion transmembrane transport
GO:0055085	transmembrane transport
GO:0071805	potassium ion transmembrane transport

Cellular Component

GO:0005886	plasma membrane
GO:0008076	voltage-gated potassium channel complex
GO:0016020	membrane

Protein Structure and Domains

PDB ID

InterPro

IPR003091 Potassium channel
IPR003937 Potassium channel, voltage dependent, KCNQ
IPR005821 Ion transport domain
IPR013099 Two pore domain potassium channel domain
IPR013821 Potassium channel, voltage dependent, KCNQ, C-terminal

PFAM

PF00520
PF07885
PF03520

PRINTS

PR00169
PR01459

PIRSF

SMART

TIGRFAMs

Post-translational Modifications

Modification

Cross-References

SwissProt

Q9NR82