KCNAB1 protein expression summary - The Human Protein Atlas

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KCNAB1

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HUMAN PROTEIN ATLAS SUMMARYⁱ General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.
Proteinⁱ Full gene name according to HGNC.	Potassium voltage-gated channel subfamily A member regulatory beta subunit 1
Gene nameⁱ Official gene symbol, which is typically a short form of the gene name, according to HGNC.	KCNAB1 (AKR6A3, hKvb3, hKvBeta3, KCNA1B, Kvb1.3)
Tissue specificityⁱ The RNA specificity category is based on mRNA expression levels in the analyzed samples based on a combination of data from HPA, GTEX and FANTOM5. The categories include: tissue enriched, group enriched, tissue enhanced, low tissue specificity and not detected. Read more	Tissue enhanced (brain, thyroid gland)
Single cell type specificityⁱ The RNA specificity category is based on mRNA expression levels in the analyzed cell types based on scRNA-seq data from normal tissues. The categories include: cell type enriched, group enriched, cell type enhanced, low cell type specificity and not detected. Read more	Group enriched (Sertoli cells, Smooth muscle cells, Bipolar cells, Cone photoreceptor cells)
Blood specificityⁱ The RNA specificity category is based on mRNA expression levels in the analyzed blood cell samples based on data from HPA. The categories include: cell type enriched, group enriched, cell type enhanced, low cell type specificity and not detected. Read more	Low immune cell specificity
Brain specificityⁱ The regional specificity category is based on mRNA expression levels in the analyzed brain samples, grouped into 10 main brain regions and calculated for the three different species. The human brain expression profile is based on a combination of data from GTEX and FANTOM5. The specificity categories include: regionally enriched, group enriched, regionally enhanced, low regional specificity and not detected. The classification rules are the same used for the tissue specificity category. Read more	Low human brain regional specificity
Cancer prognostic summary	Gene product is not prognostic
Predicted locationⁱ All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions. Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached. Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s). The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location. Read more	Intracellular
Subcellular summaryⁱ The main location is characterized by presence in all tested cell lines and/or increased intensity compared to other locations. Additional locations are characterized by either a markedly lower staining intensity than the main location, or that it is only observed in a subset of the cell lines.	Located in Nucleoplasm, Vesicles, Plasma membrane
Protein function (UniProt)ⁱ Useful information about the protein provided by UniProt.	Cytoplasmic potassium channel subunit that modulates the characteristics of the channel-forming alpha-subunits 1, 2, 3,4, 5. Modulates action potentials via its effect on the pore-forming alpha subunits (By similarity). Promotes expression of the pore-forming alpha subunits at the cell membrane, and thereby increases channel activity (By similarity). Mediates closure of delayed rectifier potassium channels by physically obstructing the pore via its N-terminal domain and increases the speed of channel closure for other family members 6. Promotes the closure of KCNA1, KCNA2 and KCNA5 channels 7, 8, 9, 10, 11, 12, 13, 14, 15, 16. Accelerates KCNA4 channel closure 17, 18, 19, 20. Accelerates the closure of heteromeric channels formed by KCNA1 and KCNA4 21. Accelerates the closure of heteromeric channels formed by KCNA2, KCNA5 and KCNA6 (By similarity). Isoform KvB1.2 has no effect on KCNA1, KCNA2 or KCNB1 22, 23. Enhances KCNB1 and KCNB2 channel activity (By similarity). Binds NADPH; this is required for efficient down-regulation of potassium channel activity 24. Has NADPH-dependent aldoketoreductase activity (By similarity). Oxidation of the bound NADPH strongly decreases N-type inactivation of potassium channel activity (By similarity).... show less
Molecular function (UniProt)ⁱ Keywords assigned by UniProt to proteins due to their particular molecular function.	Ion channel, Oxidoreductase, Voltage-gated channel
Biological process (UniProt)ⁱ Keywords assigned by UniProt to proteins because they are involved in a particular biological process.	Ion transport, Potassium transport, Transport
Ligand (UniProt)ⁱ Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.	NADP, Potassium
Gene summary (Entrez)ⁱ Useful information about the gene from Entrez	Potassium channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. Four sequence-related potassium channel genes - shaker, shaw, shab, and shal - have been identified in Drosophila, and each has been shown to have human homolog(s). This gene encodes a member of the potassium channel, voltage-gated, shaker-related subfamily. This member includes distinct isoforms which are encoded by alternatively spliced transcript variants of this gene. Some of these isoforms are beta subunits, which form heteromultimeric complexes with alpha subunits and modulate the activity of the pore-forming alpha subunits. [provided by RefSeq, Apr 2015]... show less

TISSUE ATLASⁱ Summary of data presented in the Tissue Atlas and representative images of protein expression (left) and mRNA expression (right). The images are clickable and will redirect to more Tissue Atlas data. The Tissue Atlas contains information regarding the expression profiles of protein-coding genes in normal human tissue, both on the mRNA and protein level. The protein expression data is derived from antibody-based protein profiling using immunohistochemistry. Read more

Tissue specificity (RNA)ⁱ The RNA specificity category is based on mRNA expression levels in the analyzed samples based on a combination of data from HPA, GTEX and FANTOM5. The categories include: tissue enriched, group enriched, tissue enhanced, low tissue specificity and not detected. Read more	Tissue enhanced (brain, thyroid gland)
Tissue distribution (RNA)ⁱ The RNA distribution category is based on mRNA expression levels in the analyzed samples based on a combination of data from HPA, GTEX and FANTOM5. The categories include: detected in all, detected in many, detected in some, detected in single and not detected. Read more	Detected in all
Protein expressionⁱ A summary of the overall protein expression pattern across the analyzed normal tissues. The summary is based on knowledge-based annotation. "Estimation of protein expression could not be performed. View primary data." is shown for genes analyzed with a knowledge-based approach where available RNA-seq and gene/protein characterization data has been evaluated as not sufficient in combination with immunohistochemistry data to yield a reliable estimation of the protein expression profile. Read more	Cytoplasmic expression in several different cell types, including neurons.

SINGLE CELL TYPE ATLASⁱ Summary of data presented in the Cell Type Atlas and an interactive image showing mRNA expression in cell type groups e.g. epithelial cells and germ cells. The image is clickable and will redirect to more Cell Type Atlas data. The Cell Type Atlas contains information about single cell type RNA expression based on scRNAseq of human tissues. The data also covers transcriptomics analysis of human blood and cultured cell lines. Read more

Cell type specificityⁱ The RNA specificity category is based on mRNA expression levels in the analyzed cell types based on scRNA-seq data from normal tissues. The categories include: cell type enriched, group enriched, cell type enhanced, low cell type specificity and not detected. Read more	Group enriched (Sertoli cells, Smooth muscle cells, Bipolar cells, Cone photoreceptor cells)
Cell line specificityⁱ RNA specificity category based on RNA sequencing data from all cell lines in the Human Protein Atlas. Genes are classified into six different categories (enriched, group enriched, enhanced, low specificity and not detected) according to their RNA expression levels across the panel of cell lines.	Cell line enhanced (HEL, hTEC/SVTERT24-B)

PATHOLOGY ATLASⁱ Summary of data presented in the Pathology Atlas , with representative images of protein expression in cancer (left) and correlation between mRNA expression and patient survival (right). Images are clickable and redirect to pages with more Pathology Atlas data. The Pathology Atlas contains mRNA and protein expression data from 17 different forms of human cancer, as well as correlation analysis of mRNA expression and patient survival. The protein expression data is derived from antibody-based protein profiling using immunohistochemistry. Read more

Prognostic summary	Gene product is not prognostic
Cancer specificity (RNA)ⁱ Specificity of RNA expression in 17 cancer types is categorized as either cancer enriched, group enriched, cancer enhanced, low cancer specificity and not detected. Read more	Cancer enhanced (thyroid cancer)
Cancer distribution (RNA)ⁱ Distribution of RNA expression in 17 cancer types is categorized as either detected in single, detected in some, detected in many, detected in all, or not detected. Read more	Detected in many

BRAIN ATLASⁱ Summary of data presented in the Brain Atlas and a representative image of mRNA expression in the human brain. The image is clickable and will redirect to more Brain Atlas data. The Brain Atlas explores the protein expression in the mammalian brain by visualization and integration of data from three mammalian species (human, pig and mouse). Transcriptomics data combined with affinity-based protein in situ localization down to single cell level is available in a brain-centric sub atlas of the Human Protein Atlas. Read more

Human regional specificityⁱ The regional specificity category is based on mRNA expression levels in the analyzed brain samples, grouped into 10 main brain regions and calculated for the three different species. The human brain expression profile is based on a combination of data from GTEX and FANTOM5. The specificity categories include: regionally enriched, group enriched, regionally enhanced, low regional specificity and not detected. The classification rules are the same used for the tissue specificity category. Read more	Low region specificity
Pig regional specificityⁱ The regional specificity category is based on mRNA expression levels in the analyzed brain samples, grouped into 10 main brain regions and calculated for the three different species. The human brain expression profile is based on a combination of data from GTEX and FANTOM5. The specificity categories include: regionally enriched, group enriched, regionally enhanced, low regional specificity and not detected. The classification rules are the same used for the tissue specificity category. Read more	Low region specificity
Mouse regional specificityⁱ The regional specificity category is based on mRNA expression levels in the analyzed brain samples, grouped into 10 main brain regions and calculated for the three different species. The human brain expression profile is based on a combination of data from GTEX and FANTOM5. The specificity categories include: regionally enriched, group enriched, regionally enhanced, low regional specificity and not detected. The classification rules are the same used for the tissue specificity category. Read more	Region enhanced (basal ganglia)

BLOOD ATLASⁱ Summary of data presented in the Blood Atlas and a representative image of mRNA expression in immune cells in the blood. The image is clickable and will redirect to more Blood Atlas data. The Blood Atlas contains single cell type RNA information covering various immune cells in the blood, e.g. B-cells and granulocytes. Analysis of the human secretome (including annotation of the genes predicted to be actively secreted to human blood) and proteins detected in human blood are also presented. Read more

Immune cell specificityⁱ The RNA specificity category is based on mRNA expression levels in the analyzed samples based on data from HPA. The categories include: cell type enriched, group enriched, cell type enhanced, low cell type specificity and not detected. Read more	Low cell type specificity
Detected in blood by immunoassayⁱ The blood-based immunoassay category applies to actively secreted proteins and is based on plasma or serum protein concentrations established with enzyme-linked immunosorbent assays, compiled from a literature search. The categories include: detected and not detected, where detection refers to a concentration found in the literature search. Read more	No (not applicable)
Detected in blood by mass spectrometryⁱ Detection or not of the gene in blood, based on spectral count estimations from a publicly available mass spectrometry-based plasma proteomics data set obtained from the PeptideAtlas.	No

CELL ATLASⁱ Summary of data presented in the Cell Atlas and a representative image of subcellular localization. The Cell Atlas provides RNA expression data derived from RNA sequencing of a large panel of cell lines and protein localization data derived from antibody-based profiling by immunofluorescence confocal microscopy, using a subset of cell lines selected based on RNA expression. Read more

Main locationⁱ Main subcellular location(s) and reliability score(s) for the encoded protein(s) in human cells. The main location(s) may be characterized by presence in all tested cell lines and/or ihigher staining intensity compared to the potential additional location(s). If available, links to overrepresentation analyses in Reactome, a free, open-source, curated and peer reviewed biological pathway database, are provided. An analysis is done for the corresponding gene set of the proteome localizing to the main and additional locations of the protein on this page, respectively. Read more	Localized to the Vesicles
Additional locationⁱ Additonal subcellular location(s) for the encoded protein(s) in human cells. The additional location(s) may not be present i all cell lines and may have lower staining intensity compared to the main location(s). If available, links to overrepresentation analyses in Reactome, a free, open-source, curated and peer reviewed biological pathway database, are provided. An analysis is done for the corresponding gene set of the proteome localizing to the main and additional locations of the protein on this page, respectively. Read more	In addition localized to the Nucleoplasm, Plasma membrane
Cell cycle dependencyⁱ Cell-cycle dependance of single-cell varations in RNA and/or protein expression as observed in an additional assay for characterizing single-cell varations. "NA" indicates a lack of such data. Read more	NA

GENE INFORMATIONⁱ Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.
Gene name	KCNAB1 (HGNC Symbol)
Synonyms	AKR6A3, hKvb3, hKvBeta3, KCNA1B, Kvb1.3
Description	Potassium voltage-gated channel subfamily A member regulatory beta subunit 1 (HGNC Symbol)
Chromosome	3
Cytoband	q25.31
Chromosome location (bp)	156037701 - 156539138
Number of transcriptsⁱ Number of protein-coding transcripts from the gene as defined by Ensembl.	8
Protein evidence	Evidence at protein level (all genes)
Protein classⁱ Assigned HPA protein class(es) for the encoded protein(s). Read more	Transporters
Ensembl	ENSG00000169282 (version 92.38)
Entrez gene	7881
UniProt	Q14722 (UniProt - Evidence at protein level)
neXtProt	NX_Q14722
Antibodypedia	KCNAB1 antibodies

PROTEIN BROWSERⁱ

KCNAB1-201

KCNAB1-202

KCNAB1-203

KCNAB1-205

KCNAB1-206

KCNAB1-207

KCNAB1-212

KCNAB1-215

PROTEIN INFORMATIONⁱ The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database. The ENSP identifier links to the Ensembl website protein summary, while the ENST identifier links to the Ensembl website transcript summary for the selected splice variant. The data in the UniProt column can be expanded to show links to all matching UniProt identifiers for this protein. The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class. The Gene Ontology terms assigned to this protein are listed if expanding the Gene ontology column. The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide (according to a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius) and the number of predicted transmembrane region(s) (according to MDM) are also reported.
Splice variant	UniProt	Protein class	Gene ontology	Length & mass	Signal peptide (predicted)	Transmembrane regions (predicted)
KCNAB1-201 ENSP00000305858 ENST00000302490	Q14722 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Transporters Accessory Factors Involved in Transport Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Peptideatlas) Show all	GO:0004033 [aldo-keto reductase (NADP) activity] GO:0005244 [voltage-gated ion channel activity] GO:0005249 [voltage-gated potassium channel activity] GO:0005737 [cytoplasm] GO:0005829 [cytosol] GO:0005886 [plasma membrane] GO:0006811 [ion transport] GO:0006813 [potassium ion transport] GO:0008076 [voltage-gated potassium channel complex] GO:0015459 [potassium channel regulator activity] GO:0016020 [membrane] GO:0016021 [integral component of membrane] GO:0016491 [oxidoreductase activity] GO:0019904 [protein domain specific binding] GO:0031234 [extrinsic component of cytoplasmic side of plasma membrane] GO:0034220 [ion transmembrane transport] GO:0034705 [potassium channel complex] GO:0034765 [regulation of ion transmembrane transport] GO:0055085 [transmembrane transport] GO:0055114 [oxidation-reduction process] GO:0070402 [NADPH binding] GO:0071805 [potassium ion transmembrane transport] GO:1901379 [regulation of potassium ion transmembrane transport] GO:1902259 [regulation of delayed rectifier potassium channel activity] GO:1903817 [negative regulation of voltage-gated potassium channel activity] Show all	401 aa 44.7 kDa	No	0
KCNAB1-202 ENSP00000374285 ENST00000389634	F8W6W4 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Show all	GO:0006813 [potassium ion transport] GO:0016021 [integral component of membrane] GO:0055085 [transmembrane transport] Show all	372 aa 41.4 kDa	No	0
KCNAB1-203 ENSP00000374287 ENST00000389636	B7Z8E5 [Direct mapping] Voltage-gated potassium channel subunit beta-1; cDNA FLJ59247, highly similar to Voltage-gated potassium channel subunit beta-1 Show all	Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Show all	GO:0006813 [potassium ion transport] GO:0016021 [integral component of membrane] GO:0055085 [transmembrane transport] Show all	390 aa 43.3 kDa	No	0
KCNAB1-205 ENSP00000418956 ENST00000471742	Q14722 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Transporters Accessory Factors Involved in Transport Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Peptideatlas) Show all	GO:0004033 [aldo-keto reductase (NADP) activity] GO:0005244 [voltage-gated ion channel activity] GO:0005249 [voltage-gated potassium channel activity] GO:0005737 [cytoplasm] GO:0005829 [cytosol] GO:0005886 [plasma membrane] GO:0006811 [ion transport] GO:0006813 [potassium ion transport] GO:0008076 [voltage-gated potassium channel complex] GO:0015459 [potassium channel regulator activity] GO:0016020 [membrane] GO:0016021 [integral component of membrane] GO:0016491 [oxidoreductase activity] GO:0019904 [protein domain specific binding] GO:0031234 [extrinsic component of cytoplasmic side of plasma membrane] GO:0034220 [ion transmembrane transport] GO:0034705 [potassium channel complex] GO:0034765 [regulation of ion transmembrane transport] GO:0055085 [transmembrane transport] GO:0055114 [oxidation-reduction process] GO:0070402 [NADPH binding] GO:0071805 [potassium ion transmembrane transport] GO:1901379 [regulation of potassium ion transmembrane transport] GO:1902259 [regulation of delayed rectifier potassium channel activity] GO:1903817 [negative regulation of voltage-gated potassium channel activity] Show all	408 aa 45.5 kDa	No	0
KCNAB1-206 ENSP00000420755 ENST00000472028	C9JBV8 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Show all		128 aa 14.2 kDa	No	0
KCNAB1-207 ENSP00000420221 ENST00000475456	C9JQ60 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Show all		177 aa 19.8 kDa	No	0
KCNAB1-212 ENSP00000419952 ENST00000490337	Q14722 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Transporters Accessory Factors Involved in Transport Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Peptideatlas) Show all	GO:0004033 [aldo-keto reductase (NADP) activity] GO:0005244 [voltage-gated ion channel activity] GO:0005249 [voltage-gated potassium channel activity] GO:0005737 [cytoplasm] GO:0005829 [cytosol] GO:0005886 [plasma membrane] GO:0006811 [ion transport] GO:0006813 [potassium ion transport] GO:0007420 [brain development] GO:0007507 [heart development] GO:0007519 [skeletal muscle tissue development] GO:0007611 [learning or memory] GO:0008076 [voltage-gated potassium channel complex] GO:0015459 [potassium channel regulator activity] GO:0016020 [membrane] GO:0016021 [integral component of membrane] GO:0016491 [oxidoreductase activity] GO:0019904 [protein domain specific binding] GO:0030424 [axon] GO:0031234 [extrinsic component of cytoplasmic side of plasma membrane] GO:0032839 [dendrite cytoplasm] GO:0034220 [ion transmembrane transport] GO:0034705 [potassium channel complex] GO:0034765 [regulation of ion transmembrane transport] GO:0043025 [neuronal cell body] GO:0043204 [perikaryon] GO:0044224 [juxtaparanode region of axon] GO:0044325 [ion channel binding] GO:0045445 [myoblast differentiation] GO:0055085 [transmembrane transport] GO:0055114 [oxidation-reduction process] GO:0060539 [diaphragm development] GO:0070402 [NADPH binding] GO:0071805 [potassium ion transmembrane transport] GO:1901016 [regulation of potassium ion transmembrane transporter activity] GO:1901379 [regulation of potassium ion transmembrane transport] GO:1902259 [regulation of delayed rectifier potassium channel activity] GO:1902260 [negative regulation of delayed rectifier potassium channel activity] GO:1903817 [negative regulation of voltage-gated potassium channel activity] GO:1990635 [proximal dendrite] Show all	419 aa 46.6 kDa	No	0
KCNAB1-215 ENSP00000484368 ENST00000618897	A0A087X1P8 [Direct mapping] Voltage-gated potassium channel subunit beta-1 Show all	Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Show all	GO:0006813 [potassium ion transport] GO:0016021 [integral component of membrane] GO:0055085 [transmembrane transport] Show all	304 aa 34 kDa	No	0

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The Human Protein Atlas

The Human Protein Atlas project is funded
by the Knut & Alice Wallenberg Foundation.