Q9NR82 (KCNQ5_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 109.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Potassium voltage-gated channel subfamily KQT member 5 Alternative name(s): KQT-like 5 Potassium channel subunit alpha KvLQT5 Voltage-gated potassium channel subunit Kv7.5 | ||
| Gene names |
| ||
| Organism | Homo sapiens (Human) [Reference proteome] | ||
| Taxonomic identifier | 9606 [NCBI] | ||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 932 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| 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 M1 muscarinic receptors. |
| Subunit structure | Heteromultimer with KCNQ3. |
| Subcellular location | |
| 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. |
| Domain | The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position By similarity. |
| Sequence similarities | Belongs to the potassium channel family. KQT (TC 1.A.1.15) subfamily. Kv7.5/KCNQ5 sub-subfamily. [View classification] |
| Sequence caution | The sequence BAG61495.1 differs from that shown. Reason: Erroneous initiation. Translation N-terminally extended. |
Ontologies
| Keywords | |
|---|---|
| Biological process | Ion transport Potassium transport Transport |
| Cellular component | Membrane |
| Coding sequence diversity | Alternative splicing Polymorphism |
| Domain | Transmembrane Transmembrane helix |
| Ligand | Potassium |
| Molecular function | Ion channel Potassium channel Voltage-gated channel |
| Technical term | Complete proteome Reference proteome |
| Gene Ontology (GO) | |
| Biological_process | protein complex assembly Non-traceable author statement Ref.1. Source: ProtInc synaptic transmissionTraceable author statement. Source: Reactome |
| Cellular_component | voltage-gated potassium channel complex Traceable author statement Ref.1. Source: ProtInc |
| Molecular_function | delayed rectifier potassium channel activity Inferred from Biological aspect of Ancestor. Source: RefGenome inward rectifier potassium channel activityTraceable author statement Ref.1. Source: ProtInc |
| Complete GO annotation... | |
Alternative products
| This entry describes 5 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q9NR82-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: Q9NR82-2) The sequence of this isoform differs from the canonical sequence as follows: 407-416: KKEQGEASSS → N | ||||||
| Isoform 3 (identifier: Q9NR82-3) The sequence of this isoform differs from the canonical sequence as follows: 407-416: KKEQGEASSS → NKFCSNKQKLFRMYTSRKQS | ||||||
| Isoform 4 (identifier: Q9NR82-4) The sequence of this isoform differs from the canonical sequence as follows: 416-427: SQKLSFKERVRM → RFVISLLLHVCL 428-932: Missing. | ||||||
| Note: No experimental confirmation available. | ||||||
| Isoform 5 (identifier: Q9NR82-5) The sequence of this isoform differs from the canonical sequence as follows: 416-525: Missing. | ||||||
| Note: No experimental confirmation available. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 932 | 932 | Potassium voltage-gated channel subfamily KQT member 5 | PRO_0000054040 | |||||
Regions | |||||||||
| Transmembrane | 126 – 146 | 21 | Helical; Name=Segment S1; Potential | ||||||
| Transmembrane | 157 – 177 | 21 | Helical; Name=Segment S2; Potential | ||||||
| Transmembrane | 201 – 221 | 21 | Helical; Name=Segment S3; Potential | ||||||
| Transmembrane | 230 – 252 | 23 | Helical; Voltage-sensor; Name=Segment S4; Potential | ||||||
| Transmembrane | 267 – 287 | 21 | Helical; Name=Segment S5; Potential | ||||||
| Intramembrane | 299 – 319 | 21 | Pore-forming; Name=Segment H5; Potential | ||||||
| Transmembrane | 326 – 346 | 21 | Helical; Name=Segment S6; Potential | ||||||
| Motif | 311 – 316 | 6 | Selectivity filter By similarity | ||||||
Natural variations | |||||||||
| Alternative sequence | 407 – 416 | 10 | KKEQGEASSS → N in isoform 2. | VSP_001014 | |||||
| Alternative sequence | 407 – 416 | 10 | KKEQGEASSS → NKFCSNKQKLFRMYTSRKQS in isoform 3. | VSP_001015 | |||||
| Alternative sequence | 416 – 525 | 110 | Missing in isoform 5. | VSP_045487 | |||||
| Alternative sequence | 416 – 427 | 12 | SQKLS…ERVRM → RFVISLLLHVCL in isoform 4. | VSP_022318 | |||||
| Alternative sequence | 428 – 932 | 505 | Missing in isoform 4. | VSP_022319 | |||||
| Natural variant | 191 | 1 | W → G in a colorectal cancer sample; somatic mutation. Ref.9 | VAR_035772 | |||||
| Natural variant | 244 | 1 | R → C in a colorectal cancer sample; somatic mutation. Ref.9 | VAR_035773 | |||||
Experimental info | |||||||||
| Sequence conflict | 92 – 93 | 2 | KP → SR in AAF91335. Ref.1 | ||||||
| Sequence conflict | 109 | 1 | R → Q in BAG61495. Ref.4 | ||||||
| Sequence conflict | 129 | 1 | Y → H in AAF73446. Ref.7 | ||||||
| Sequence conflict | 727 | 1 | A → V in AAF73446. Ref.7 | ||||||
| Sequence conflict | 799 | 1 | T → P in AAF73446. Ref.7 | ||||||
| Sequence conflict | 857 | 1 | S → R in AAF73446. Ref.7 | ||||||
| Sequence conflict | 909 | 1 | R → Q in AAF73446. Ref.7 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Molecular cloning and functional expression of KCNQ5, a potassium channel subunit that may contribute to neuronal M-current diversity." Lerche C., Scherer C.R., Seebohm G., Derst C., Wei A.D., Busch A.E., Steinmeyer K. J. Biol. Chem. 275:22395-22400(2000) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Brain. |
| [2] | "The DNA sequence and analysis of human chromosome 6." Mungall A.J., Palmer S.A., Sims S.K., Edwards C.A., Ashurst J.L., Wilming L., Jones M.C., Horton R., Hunt S.E., Scott C.E., Gilbert J.G.R., Clamp M.E., Bethel G., Milne S., Ainscough R., Almeida J.P., Ambrose K.D., Andrews T.D. Beck S.Nature 425:805-811(2003) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [3] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 2 AND 4). Tissue: Placenta. |
| [4] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 19-822 (ISOFORM 5). Tissue: Brain. |
| [5] | "KCNQ5, a novel potassium channel broadly expressed in brain, mediates M-type currents." Schroeder B.C., Hechenberger M., Weinreich F., Kubisch C., Jentsch T.J. J. Biol. Chem. 275:24089-24095(2000) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 36-932 (ISOFORMS 1; 2 AND 3). Tissue: Brain. |
| [6] | "The new voltage gated potassium channel KCNQ5 and early infantile convulsions." Kananura C., Biervert B., Hechenberger M., Engels H., Steinlein O.K. Submitted (FEB-2000) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 36-932. |
| [7] | "A new gene of the voltage-gated potassium channel KCNQ family, KCNQ5, is a candidate gene for retinal disorders." Kniazeva M., Han M. Submitted (MAY-2000) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 72-932 (ISOFORM 1). Tissue: Brain and Retina. |
| [8] | "Characterization of KCNQ5/Q3 potassium channels expressed in mammalian cells." Wickenden A.D., Zou A., Wagoner P.K., Jegla T. Br. J. Pharmacol. 132:381-384(2001) [PubMed] [Europe PMC] [Abstract] Cited for: CHARACTERIZATION, ACTIVATION BY RETICABINE. |
| [9] | "The consensus coding sequences of human breast and colorectal cancers." Sjoeblom T., Jones S., Wood L.D., Parsons D.W., Lin J., Barber T.D., Mandelker D., Leary R.J., Ptak J., Silliman N., Szabo S., Buckhaults P., Farrell C., Meeh P., Markowitz S.D., Willis J., Dawson D., Willson J.K.V. Velculescu V.E.Science 314:268-274(2006) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS [LARGE SCALE ANALYSIS] GLY-191 AND CYS-244. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF249278 mRNA. Translation: AAF91335.1. AL445569, AL360236, AL365232 Genomic DNA. Translation: CAH70463.1. AL445569, AL360236 Genomic DNA. Translation: CAH70464.1. AL360236, AL365232, AL445569 Genomic DNA. Translation: CAH73176.1. AL360236, AL445569 Genomic DNA. Translation: CAH73177.1. AL365232, AL360236, AL445569 Genomic DNA. Translation: CAI39828.1. AL513522 Genomic DNA. No translation available. AL671823 Genomic DNA. No translation available. BC050689 mRNA. Translation: AAH50689.1. BC117359 mRNA. Translation: AAI17360.1. BC143554 mRNA. Translation: AAI43555.1. AK299550 mRNA. Translation: BAG61495.1. Different initiation. AF202977 mRNA. Translation: AAF69797.1. AJ272506 AJ272519 Genomic DNA. Translation: CAC88112.1.AF263835 mRNA. Translation: AAF73446.1. |
| IPI | IPI00473029. IPI00478577. IPI00854572. IPI00930175. |
| RefSeq | NP_001153602.1. NM_001160130.1. NP_001153604.1. NM_001160132.1. NP_001153606.1. NM_001160134.1. NP_062816.2. NM_019842.3. |
| UniGene | Hs.445324. |
3D structure databases | |
| ProteinModelPortal | Q9NR82. |
| ModBase | Search... |
Protein-protein interaction databases | |
| STRING | 9606.ENSP00000359425. |
PTM databases | |
| PhosphoSite | Q9NR82. |
Polymorphism databases | |
| DMDM | 122065285. |
Proteomic databases | |
| PaxDb | Q9NR82. |
| PRIDE | Q9NR82. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000370392; ENSP00000359419; ENSG00000185760. ENST00000370398; ENSP00000359425; ENSG00000185760. ENST00000402622; ENSP00000385501; ENSG00000185760. ENST00000403813; ENSP00000384453; ENSG00000185760. ENST00000414165; ENSP00000409861; ENSG00000185760. |
| GeneID | 56479. |
| KEGG | hsa:56479. |
| UCSC | uc003pgj.4. human. uc003pgk.3. human. uc010kat.3. human. uc011dyi.2. human. |
Organism-specific databases | |
| CTD | 56479. |
| GeneCards | GC06P073331. |
| HGNC | HGNC:6299. KCNQ5. |
| HPA | HPA016655. |
| MIM | 607357. gene. |
| neXtProt | NX_Q9NR82. |
| PharmGKB | PA30077. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | COG1226. |
| HOVERGEN | HBG059014. |
| KO | K04930. |
Enzyme and pathway databases | |
| Reactome | REACT_13685. Neuronal System. |
Gene expression databases | |
| ArrayExpress | Q9NR82. |
| Bgee | Q9NR82. |
| CleanEx | HS_KCNQ5. |
| Genevestigator | Q9NR82. |
| GermOnline | ENSG00000185760. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR005821. Ion_trans_dom. IPR003091. K_chnl. IPR003937. K_chnl_volt-dep_KCNQ. IPR013821. K_chnl_volt-dep_KCNQ_C. [Graphical view] |
| Pfam | PF00520. Ion_trans. 1 hit. PF03520. KCNQ_channel. 1 hit. [Graphical view] |
| PRINTS | PR00169. KCHANNEL. PR01459. KCNQCHANNEL. |
| ProtoNet | Search... |
Other | |
| BindingDB | Q9NR82. |
| ChEMBL | CHEMBL2925. |
| GenomeRNAi | 56479. |
| NextBio | 62021. |
| SOURCE | Search... |
Entry information
| Entry name | KCNQ5_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q9NR82 Secondary accession number(s): B4DS33 Q9NYA6 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 6 Human chromosome 6: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
