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Entry version 171 (29 Sep 2021)
Sequence version 2 (27 Jul 2011)
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Protein

Potassium channel subfamily K member 1

Gene

Kcnk1

Organism
Mus musculus (Mouse)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Ion channel that contributes to passive transmembrane potassium transport and to the regulation of the resting membrane potential in brain astrocytes, but also in kidney and in other tissues (PubMed:16847696, PubMed:22431633, PubMed:24368895).

Forms dimeric channels through which potassium ions pass in accordance with their electrochemical gradient. The channel is selective for K+ ions at physiological potassium concentrations and at neutral pH, but becomes permeable to Na+ at subphysiological K+ levels and upon acidification of the extracellular medium. The homodimer has very low potassium channel activity, when expressed in heterologous systems, and can function as weakly inward rectifying potassium channel (PubMed:9013852, PubMed:24496152).

Channel activity is modulated by activation of serotonin receptors (PubMed:24368895).

Heterodimeric channels containing KCNK1 and KCNK2 have much higher activity, and may represent the predominant form in astrocytes (PubMed:24496152).

Heterodimeric channels containing KCNK1 and KCNK3 or KCNK9 have much higher activity. Heterodimeric channels formed by KCNK1 and KCNK9 may contribute to halothane-sensitive currents (By similarity).

Mediates outward rectifying potassium currents in dentate gyrus granule cells and contributes to the regulation of their resting membrane potential (PubMed:25406588).

Contributes to the regulation of action potential firing in dentate gyrus granule cells and down-regulates their intrinsic excitability (PubMed:25406588).

In astrocytes, the heterodimer formed by KCNK1 and KCNK2 is required for rapid glutamate release in response to activation of G-protein coupled receptors, such as F2R and CNR1 (PubMed:24496152).

Required for normal ion and water transport in the kidney (PubMed:16025300).

Contributes to the regulation of the resting membrane potential of pancreatic beta cells (PubMed:22431633).

The low channel activity of homodimeric KCNK1 may be due to sumoylation. The low channel activity may be due to rapid internalization from the cell membrane and retention in recycling endosomes (PubMed:15540117).

By similarity7 Publications

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

Inhibited by quinine, quinidine, barium, and internal acidification.1 Publication1 Publication

<p>This subsection of the 'Function' section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

Both activation and channel closure are very rapid. Is not voltage-gated (PubMed:22431633, PubMed:24496152). The relationship between voltage and current is nearly linear (PubMed:22431633, PubMed:24496152).Curated2 Publications

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections ('Function', 'PTM / Processing', 'Pathology and Biotech') according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei118Important for increased permeability to Na(+) when K(+) levels are subphysiologicalBy similarity1
Sitei146Part of a hydrophobic barrier that is stochastically dewetted and limits ion permeabilityBy similarity1
Sitei261Part of a hydrophobic barrier that is stochastically dewetted and limits ion permeabilityBy similarity1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionIon channel, Potassium channel
Biological processIon transport, Potassium transport, Transport
LigandPotassium

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-MMU-1299308, Tandem of pore domain in a weak inwardly rectifying K+ channels (TWIK)
R-MMU-5576886, Phase 4 - resting membrane potential

Protein family/group databases

Transport Classification Database

More...
TCDBi
1.A.1.8.1, the voltage-gated ion channel (vic) superfamily

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Potassium channel subfamily K member 1
Alternative name(s):
Inward rectifying potassium channel protein TWIK-11 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:Kcnk1
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiMus musculus (Mouse)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri10090 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000589 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 8

Organism-specific databases

Mouse genome database (MGD) from Mouse Genome Informatics (MGI)

More...
MGIi
MGI:109322, Kcnk1

Eukaryotic Pathogen, Vector and Host Database Resources

More...
VEuPathDBi
HostDB:ENSMUSG00000033998

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini1 – 20CytoplasmicBy similarityAdd BLAST20
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei21 – 41HelicalBy similarityAdd BLAST21
Topological domaini42 – 103ExtracellularBy similarityAdd BLAST62
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a region that is buried within a membrane, but does not cross it.<p><a href='/help/intramem' target='_top'>More...</a></p>Intramembranei104 – 116Helical; Name=Pore helix 1By similarityAdd BLAST13
Intramembranei117 – 122By similarity6
Topological domaini123 – 132ExtracellularBy similarity10
Transmembranei133 – 156HelicalBy similarityAdd BLAST24
Topological domaini157 – 181CytoplasmicBy similarityAdd BLAST25
Transmembranei182 – 202HelicalBy similarityAdd BLAST21
Topological domaini203 – 211ExtracellularBy similarity9
Intramembranei212 – 224Helical; Name=Pore helix 2By similarityAdd BLAST13
Intramembranei225 – 231By similarity7
Topological domaini232 – 243ExtracellularBy similarityAdd BLAST12
Transmembranei244 – 267HelicalBy similarityAdd BLAST24
Topological domaini268 – 336CytoplasmicBy similarityAdd BLAST69

Keywords - Cellular componenti

Cell junction, Cell membrane, Cell projection, Cytoplasmic vesicle, Endosome, Membrane, Synapse

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the 'Pathology and Biotech' section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

No visible phenotype on standard chow, excepting a lower urinary flow rate (PubMed:16025300). Mice appear normal and are fertile (PubMed:24368895). When kept on a low phosphate diet, both wild-type and mutant mice show strongly reduced urinary phosphate secretion. Still, mutant mice display higher fractional urinary phosphate secretion relative to wild-type, leading to reduced inorganic phosphate levels in blood plasma. The impaired phosphate homeostasis seems to be due to indirect effects on the expression of other transporters, such as SLC34A1 and AQP2 (PubMed:16025300). Principal cells from kidney collecting duct are hyperpolarized, display reduced potassium conductance and strongly reduced quinidine-sensitive potassium channel activity (PubMed:16847696). Besides, collecting ducts from mutant mouse kidney display a larger diameter relative to wild-type (PubMed:16847696).3 Publications

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology_and_biotech_section">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi69C → S: Abolishes formation of a disulfide-linked heterodimer with KCNK2. 1 Publication1
Mutagenesisi119G → E: Abolishes potassium channel activity. 1 Publication1
Mutagenesisi293 – 294IM → AA: Increases channel expression at the cell membrane, resulting in higher channel activity. 1 Publication2

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001017411 – 336Potassium channel subfamily K member 1Add BLAST336

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi69InterchainBy similarity1 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi95N-linked (GlcNAc...) asparagineSequence analysis1
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section describes <strong>covalent linkages</strong> of various types formed <strong>between two proteins (interchain cross-links)</strong> or <strong>between two parts of the same protein (intrachain cross-links)</strong>, except the disulfide bonds that are annotated in the <a href="http://www.uniprot.org/manual/disulfid">'Disulfide bond'</a> subsection.<p><a href='/help/crosslnk' target='_top'>More...</a></p>Cross-linki274Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO)By similarity
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei326PhosphoserineBy similarity1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Sumoylation is controversial. Sumoylated by UBE2I. Not sumoylated when expressed in xenopus oocytes or mammalian cells. Sumoylation inactivates the channel, but does not interfere with expression at the cell membrane. Sumoylation of a single subunit is sufficient to silence the dimeric channel. Sumoylation of KCNK1 is sufficient to silence heterodimeric channels formed by KCNK1 and KCNK3 or KCNK9. Desumoylated by SENP1; this activates the channel. Desumoylated by SENP1; this strongly increases halothane-mediated activation of heterodimeric channels formed with KCNK9. SENP1 treatment has no effect.By similarity

Keywords - PTMi

Disulfide bond, Glycoprotein, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

MaxQB - The MaxQuant DataBase

More...
MaxQBi
O08581

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
O08581

PeptideAtlas

More...
PeptideAtlasi
O08581

PRoteomics IDEntifications database

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PRIDEi
O08581

ProteomicsDB: a multi-organism proteome resource

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ProteomicsDBi
263403

PTM databases

GlyGen: Computational and Informatics Resources for Glycoscience

More...
GlyGeni
O08581, 1 site

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
O08581

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...
PhosphoSitePlusi
O08581

SwissPalm database of S-palmitoylation events

More...
SwissPalmi
O08581

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified 'at protein level'.<br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Detected in spiral ganglion neurons (PubMed:17079103). Detected in hippocampus CA1 and CA1 regions and in the molecular layer of the dentate gyrus (PubMed:24368895, PubMed:25406588). Detected on hippocampus astrocytes (PubMed:24368895, PubMed:24496152). Highly expressed in the stria vascularis in the cochlea (PubMed:12855359). Detected in pancreas islet beta cells (PubMed:22431633). Detected in kidney, at brush border membranes in proximal tubules and in cytoplasmic structures in distal convoluted tubules, thick ascending limbs and collecting ducts (at protein level) (PubMed:15540117, PubMed:16025300). Widely expressed. Detected in spiral ganglion cells (PubMed:17079103). Highest expression in brain, kidney, thyroid, salivary gland, adrenal gland, prostate, epididymis, uterus, placenta, colon and jejunum. Moderate expression in eyes, pituitary, pancreas, smooth muscle, testis and ovary. Very low levels in lung, aorta, liver, heart, skeletal muscle, thymus and spleen. In the brain, highest expression in cerebellar granule cells, brainstem, hippocampus and cerebral cortex (PubMed:18222039).8 Publications

<p>This subsection of the 'Expression' section provides information on the expression of the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified 'at the protein level'.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Detected at very low levels in the embryonic central nervous system (PubMed:9559671, PubMed:18222039). Detected as early as 7 days post conception (PubMed:9559671). Detected in dorsal root ganglia, hippocampus, olfactory epithelia and intestine at 19 dpc (PubMed:18222039). Expression in the brain increases strongly 3-8 days after birth, a period of intense postnatal brain development (PubMed:9559671, PubMed:18222039). Detected in dentate granule cells; expression levels show no significant variability during postnatal development (PubMed:18222039). Expression is higher in adults than in neonates (PubMed:9559671, PubMed:18222039).2 Publications

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSMUSG00000033998, Expressed in seminal vesicle and 317 other tissues

ExpressionAtlas, Differential and Baseline Expression

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ExpressionAtlasi
O08581, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
O08581, MM

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homodimer; disulfide-linked (PubMed:9013852). Heterodimer with KCNK2; disulfide-linked (PubMed:24496152). In astrocytes, forms mostly heterodimeric potassium channels with KCNK2, with only a minor proportion of functional channels containing homodimeric KCNK1 (By similarity).

Interacts with KCNK3 and KCNK9, forming functional heterodimeric channels (By similarity).

Interacts with GNG4 (PubMed:24496152).

Identified in a complex with PSD and ARF6; interacts only with PSD that is bound to ARF6 (PubMed:15540117).

Interacts with UBE2I (By similarity).

By similarity3 Publications

GO - Molecular functioni

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
200907, 46 interactors

Protein interaction database and analysis system

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IntActi
O08581, 45 interactors

STRING: functional protein association networks

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STRINGi
10090.ENSMUSP00000046103

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

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RNActi
O08581, protein

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

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SMRi
O08581

Database of comparative protein structure models

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ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni117 – 122Selectivity filter 1By similarity6
Regioni225 – 230Selectivity filter 2By similarity6
Regioni293 – 299Important for intracellular retention in recycling endosomesBy similarity7
Regioni310 – 336DisorderedSequence analysisAdd BLAST27

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG1418, Eukaryota

Ensembl GeneTree

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GeneTreei
ENSGT00940000155293

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

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HOGENOMi
CLU_022504_6_0_1

InParanoid: Eukaryotic Ortholog Groups

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InParanoidi
O08581

Identification of Orthologs from Complete Genome Data

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OMAi
NHKSTWY

Database of Orthologous Groups

More...
OrthoDBi
1211599at2759

Database for complete collections of gene phylogenies

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PhylomeDBi
O08581

TreeFam database of animal gene trees

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TreeFami
TF313947

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR003280, 2pore_dom_K_chnl
IPR003092, 2pore_dom_K_chnl_TASK
IPR005408, 2pore_dom_K_chnl_TWIK
IPR001779, 2pore_dom_K_chnl_TWIK1
IPR013099, K_chnl_dom

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF07885, Ion_trans_2, 2 hits

PIRSF; a whole-protein classification database

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PIRSFi
PIRSF038061, K_channel_subfamily_K_type, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR01333, 2POREKCHANEL
PR01096, TWIK1CHANNEL
PR01586, TWIKCHANNEL

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequence (1+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry has 1 described isoform and 1 potential isoform that is computationally mapped.Show allAlign All

O08581-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MLQSLAGSSC VRLVERHRSA WCFGFLVLGY LLYLVFGAVV FSSVELPYED
60 70 80 90 100
LLRQELRKLK RRFLEEHECL SEPQLEQFLG RVLEASNYGV SVLSNASGNW
110 120 130 140 150
NWDFTSALFF ASTVLSTTGY GHTVPLSDGG KAFCIIYSVI GIPFTLLFLT
160 170 180 190 200
AVVQRVTVHV TRRPVLYFHI RWGFSKQVVA IVHAVLLGFV TVSCFFFIPA
210 220 230 240 250
AVFSVLEDDW NFLESFYFCF ISLSTIGLGD YVPGEGYNQK FRELYKIGIT
260 270 280 290 300
CYLLLGLIAM LVVLETFCEL HELKKFRKMF YVKKDKDEDL VHIMEHDQLS
310 320 330
FSSVTEQVAG LKEEQKQSEP FVASQSPPYE DGSADH
Length:336
Mass (Da):38,201
Last modified:July 27, 2011 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i76B7FD5361A6216C
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
A0A1D5RMH2A0A1D5RMH2_MOUSE
Potassium channel subfamily K membe...
Kcnk1
328Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti44V → E in AAC16973 (PubMed:9013852).Curated1
Sequence conflicti152V → L in AAC16973 (PubMed:9013852).Curated1
Sequence conflicti259A → T in AAC16973 (PubMed:9013852).Curated1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AF033017 mRNA Translation: AAC16973.1
CH466525 Genomic DNA Translation: EDL11808.1
BC003729 mRNA Translation: AAH03729.1

The Consensus CDS (CCDS) project

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CCDSi
CCDS22783.1

NCBI Reference Sequences

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RefSeqi
NP_032456.2, NM_008430.2

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSMUST00000046765; ENSMUSP00000046103; ENSMUSG00000033998

Database of genes from NCBI RefSeq genomes

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GeneIDi
16525

KEGG: Kyoto Encyclopedia of Genes and Genomes

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KEGGi
mmu:16525

UCSC genome browser

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UCSCi
uc009nyr.3, mouse

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF033017 mRNA Translation: AAC16973.1
CH466525 Genomic DNA Translation: EDL11808.1
BC003729 mRNA Translation: AAH03729.1
CCDSiCCDS22783.1
RefSeqiNP_032456.2, NM_008430.2

3D structure databases

SMRiO08581
ModBaseiSearch...

Protein-protein interaction databases

BioGRIDi200907, 46 interactors
IntActiO08581, 45 interactors
STRINGi10090.ENSMUSP00000046103

Protein family/group databases

TCDBi1.A.1.8.1, the voltage-gated ion channel (vic) superfamily

PTM databases

GlyGeniO08581, 1 site
iPTMnetiO08581
PhosphoSitePlusiO08581
SwissPalmiO08581

Proteomic databases

MaxQBiO08581
PaxDbiO08581
PeptideAtlasiO08581
PRIDEiO08581
ProteomicsDBi263403

Protocols and materials databases

Antibodypedia a portal for validated antibodies

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Antibodypediai
20802, 310 antibodies

The DNASU plasmid repository

More...
DNASUi
16525

Genome annotation databases

EnsembliENSMUST00000046765; ENSMUSP00000046103; ENSMUSG00000033998
GeneIDi16525
KEGGimmu:16525
UCSCiuc009nyr.3, mouse

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
3775
MGIiMGI:109322, Kcnk1
VEuPathDBiHostDB:ENSMUSG00000033998

Phylogenomic databases

eggNOGiKOG1418, Eukaryota
GeneTreeiENSGT00940000155293
HOGENOMiCLU_022504_6_0_1
InParanoidiO08581
OMAiNHKSTWY
OrthoDBi1211599at2759
PhylomeDBiO08581
TreeFamiTF313947

Enzyme and pathway databases

ReactomeiR-MMU-1299308, Tandem of pore domain in a weak inwardly rectifying K+ channels (TWIK)
R-MMU-5576886, Phase 4 - resting membrane potential

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

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BioGRID-ORCSi
16525, 2 hits in 61 CRISPR screens

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...
ChiTaRSi
Kcnk1, mouse

Protein Ontology

More...
PROi
PR:O08581
RNActiO08581, protein

The Stanford Online Universal Resource for Clones and ESTs

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SOURCEi
Search...

Gene expression databases

BgeeiENSMUSG00000033998, Expressed in seminal vesicle and 317 other tissues
ExpressionAtlasiO08581, baseline and differential
GenevisibleiO08581, MM

Family and domain databases

InterProiView protein in InterPro
IPR003280, 2pore_dom_K_chnl
IPR003092, 2pore_dom_K_chnl_TASK
IPR005408, 2pore_dom_K_chnl_TWIK
IPR001779, 2pore_dom_K_chnl_TWIK1
IPR013099, K_chnl_dom
PfamiView protein in Pfam
PF07885, Ion_trans_2, 2 hits
PIRSFiPIRSF038061, K_channel_subfamily_K_type, 1 hit
PRINTSiPR01333, 2POREKCHANEL
PR01096, TWIK1CHANNEL
PR01586, TWIKCHANNEL

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiKCNK1_MOUSE
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: O08581
Secondary accession number(s): Q99L99
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 21, 2001
Last sequence update: July 27, 2011
Last modified: September 29, 2021
This is version 171 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Reference proteome

Documents

  1. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
  2. SIMILARITY comments
    Index of protein domains and families
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