Type |
Details |
Score |
Publication |
First Author: |
Strausberg R |
Year: |
2001 |
Journal: |
GenBank Submission |
Title: |
Mus musculus, potassium voltage-gated channel, Isk-related subfamily, gene 3, clone MGC: 6717, mRNA, complete cds |
|
|
Pages: |
BC004629 |
|
•
•
•
•
•
|
Publication |
First Author: |
Teng S |
Year: |
2003 |
Journal: |
Biochem Biophys Res Commun |
Title: |
Novel gene hKCNE4 slows the activation of the KCNQ1 channel. |
Volume: |
303 |
Issue: |
3 |
Pages: |
808-13 |
|
•
•
•
•
•
|
Publication |
First Author: |
Hu Z |
Year: |
2014 |
Journal: |
Circ Cardiovasc Genet |
Title: |
Kcne2 deletion creates a multisystem syndrome predisposing to sudden cardiac death. |
Volume: |
7 |
Issue: |
1 |
Pages: |
33-42 |
|
•
•
•
•
•
|
Publication |
First Author: |
Phansalkar R |
Year: |
2021 |
Journal: |
Elife |
Title: |
Coronary blood vessels from distinct origins converge to equivalent states during mouse and human development. |
Volume: |
10 |
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Hagendorf S |
Year: |
2009 |
Journal: |
J Neurosci |
Title: |
Homeostatic control of sensory output in basal vomeronasal neurons: activity-dependent expression of ether-à-go-go-related gene potassium channels. |
Volume: |
29 |
Issue: |
1 |
Pages: |
206-21 |
|
•
•
•
•
•
|
Publication |
First Author: |
Rattner A |
Year: |
2013 |
Journal: |
Proc Natl Acad Sci U S A |
Title: |
Endothelin-2 signaling in the neural retina promotes the endothelial tip cell state and inhibits angiogenesis. |
Volume: |
110 |
Issue: |
40 |
Pages: |
E3830-9 |
|
•
•
•
•
•
|
Publication |
First Author: |
Takase H |
Year: |
2012 |
Journal: |
Blood |
Title: |
Genome-wide identification of endothelial cell-enriched genes in the mouse embryo. |
Volume: |
120 |
Issue: |
4 |
Pages: |
914-23 |
|
•
•
•
•
•
|
Publication |
First Author: |
Menendez-Montes I |
Year: |
2016 |
Journal: |
Dev Cell |
Title: |
Myocardial VHL-HIF Signaling Controls an Embryonic Metabolic Switch Essential for Cardiac Maturation. |
Volume: |
39 |
Issue: |
6 |
Pages: |
724-739 |
|
•
•
•
•
•
|
Publication |
First Author: |
Uribe V |
Year: |
2014 |
Journal: |
Development |
Title: |
Arid3b is essential for second heart field cell deployment and heart patterning. |
Volume: |
141 |
Issue: |
21 |
Pages: |
4168-81 |
|
•
•
•
•
•
|
Publication |
First Author: |
Harrell MD |
Year: |
2007 |
Journal: |
Physiol Genomics |
Title: |
Large-scale analysis of ion channel gene expression in the mouse heart during perinatal development. |
Volume: |
28 |
Issue: |
3 |
Pages: |
273-83 |
|
•
•
•
•
•
|
Publication |
First Author: |
Lewandowski JP |
Year: |
2015 |
Journal: |
Dev Biol |
Title: |
Spatiotemporal regulation of GLI target genes in the mammalian limb bud. |
Volume: |
406 |
Issue: |
1 |
Pages: |
92-103 |
|
•
•
•
•
•
|
Publication |
First Author: |
Hoffman BG |
Year: |
2008 |
Journal: |
Genome Biol |
Title: |
Identification of transcripts with enriched expression in the developing and adult pancreas. |
Volume: |
9 |
Issue: |
6 |
Pages: |
R99 |
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2001 |
|
Title: |
RIKEN Data Curation in Mouse Genome Informatics |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
International Knockout Mouse Consortium |
Year: |
2014 |
Journal: |
Database Download |
Title: |
MGI download of modified allele data from IKMC and creation of new knockout alleles |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Velocigene |
Year: |
2008 |
Journal: |
MGI Direct Data Submission |
Title: |
Alleles produced for the KOMP project by Velocigene (Regeneron Pharmaceuticals) |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
International Mouse Strain Resource |
Year: |
2014 |
Journal: |
Database Download |
Title: |
MGI download of germline transmission data for alleles from IMSR strain data |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics and the International Mouse Phenotyping Consortium (IMPC) |
Year: |
2014 |
Journal: |
Database Release |
Title: |
Obtaining and Loading Phenotype Annotations from the International Mouse Phenotyping Consortium (IMPC) Database |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
The Gene Ontology Consortium |
Year: |
2014 |
|
Title: |
Automated transfer of experimentally-verified manual GO annotation data to mouse-rat orthologs |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
UniProt-GOA |
Year: |
2012 |
|
Title: |
Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping, accompanied by conservative changes to GO terms applied by UniProt |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
DDB, FB, MGI, GOA, ZFIN curators |
Year: |
2001 |
|
Title: |
Gene Ontology annotation through association of InterPro records with GO terms |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2002 |
|
Title: |
Chromosome assignment of mouse genes using the Mouse Genome Sequencing Consortium (MGSC) assembly and the ENSEMBL Database |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Carninci P |
Year: |
2005 |
Journal: |
Science |
Title: |
The transcriptional landscape of the mammalian genome. |
Volume: |
309 |
Issue: |
5740 |
Pages: |
1559-63 |
|
•
•
•
•
•
|
Publication |
First Author: |
Kawai J |
Year: |
2001 |
Journal: |
Nature |
Title: |
Functional annotation of a full-length mouse cDNA collection. |
Volume: |
409 |
Issue: |
6821 |
Pages: |
685-90 |
|
•
•
•
•
•
|
Publication |
First Author: |
Adams DJ |
Year: |
2024 |
Journal: |
Nature |
Title: |
Genetic determinants of micronucleus formation in vivo. |
Volume: |
627 |
Issue: |
8002 |
Pages: |
130-136 |
|
•
•
•
•
•
|
Publication |
First Author: |
GemPharmatech |
Year: |
2020 |
|
Title: |
GemPharmatech Website. |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Cyagen Biosciences Inc. |
Year: |
2022 |
|
Title: |
Cyagen Biosciences Website. |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
AgBase, BHF-UCL, Parkinson's UK-UCL, dictyBase, HGNC, Roslin Institute, FlyBase and UniProtKB curators |
Year: |
2011 |
|
Title: |
Manual transfer of experimentally-verified manual GO annotation data to orthologs by curator judgment of sequence similarity |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
GOA curators |
Year: |
2016 |
|
Title: |
Automatic transfer of experimentally verified manual GO annotation data to orthologs using Ensembl Compara |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Okazaki Y |
Year: |
2002 |
Journal: |
Nature |
Title: |
Analysis of the mouse transcriptome based on functional annotation of 60,770 full-length cDNAs. |
Volume: |
420 |
Issue: |
6915 |
Pages: |
563-73 |
|
•
•
•
•
•
|
Publication |
First Author: |
The Gene Ontology Consortium |
Year: |
2010 |
|
Title: |
Automated transfer of experimentally-verified manual GO annotation data to mouse-human orthologs |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Diez-Roux G |
Year: |
2011 |
Journal: |
PLoS Biol |
Title: |
A high-resolution anatomical atlas of the transcriptome in the mouse embryo. |
Volume: |
9 |
Issue: |
1 |
Pages: |
e1000582 |
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2002 |
|
Title: |
Mouse Genome Informatics Computational Sequence to Gene Associations |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2010 |
Journal: |
Database Download |
Title: |
Mouse Microarray Data Integration in Mouse Genome Informatics, the Affymetrix GeneChip Mouse Genome U74 Array Platform (A, B, C v2). |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
MGI Genome Annotation Group and UniGene Staff |
Year: |
2015 |
Journal: |
Database Download |
Title: |
MGI-UniGene Interconnection Effort |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Marc Feuermann, Huaiyu Mi, Pascale Gaudet, Dustin Ebert, Anushya Muruganujan, Paul Thomas |
Year: |
2010 |
|
Title: |
Annotation inferences using phylogenetic trees |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Database and National Center for Biotechnology Information |
Year: |
2000 |
Journal: |
Database Release |
Title: |
Entrez Gene Load |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Allen Institute for Brain Science |
Year: |
2004 |
Journal: |
Allen Institute |
Title: |
Allen Brain Atlas: mouse riboprobes |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2009 |
Journal: |
Database Download |
Title: |
Mouse Microarray Data Integration in Mouse Genome Informatics, the Affymetrix GeneChip Mouse Gene 1.0 ST Array Platform |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics (MGI) and The National Center for Biotechnology Information (NCBI) |
Year: |
2010 |
Journal: |
Database Download |
Title: |
Consensus CDS project |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Group |
Year: |
2003 |
Journal: |
Database Procedure |
Title: |
Automatic Encodes (AutoE) Reference |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Bairoch A |
Year: |
1999 |
Journal: |
Database Release |
Title: |
SWISS-PROT Annotated protein sequence database |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2005 |
|
Title: |
Obtaining and Loading Genome Assembly Coordinates from Ensembl Annotations |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics |
Year: |
2010 |
Journal: |
Database Release |
Title: |
Protein Ontology Association Load. |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2005 |
|
Title: |
Obtaining and loading genome assembly coordinates from NCBI annotations |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Mouse Genome Informatics Scientific Curators |
Year: |
2009 |
Journal: |
Database Download |
Title: |
Mouse Microarray Data Integration in Mouse Genome Informatics, the Affymetrix GeneChip Mouse Genome 430 2.0 Array Platform |
|
|
|
|
•
•
•
•
•
|
Publication |
First Author: |
Abbott GW |
Year: |
2001 |
Journal: |
Cell |
Title: |
MiRP2 forms potassium channels in skeletal muscle with Kv3.4 and is associated with periodic paralysis. |
Volume: |
104 |
Issue: |
2 |
Pages: |
217-31 |
|
•
•
•
•
•
|
Publication |
First Author: |
Schroeder BC |
Year: |
2000 |
Journal: |
Nature |
Title: |
A constitutively open potassium channel formed by KCNQ1 and KCNE3. |
Volume: |
403 |
Issue: |
6766 |
Pages: |
196-9 |
|
•
•
•
•
•
|
Protein Domain |
Type: |
Family |
Description: |
Potassium channels are the most diverse group of the ion channel family [, ]. They are important in shaping the action potential, and in neuronal excitability and plasticity []. The potassium channel family is composed of several functionally distinct isoforms, which can be broadly separated into 2 groups []: the practically non-inactivating 'delayed' group and the rapidly inactivating 'transient' group.These are all highly similar proteins, with only small amino acid changes causing the diversity of the voltage-dependent gating mechanism, channel conductance and toxin binding properties. Each type of K+channel is activated by different signals and conditions depending on their type of regulation: some open in response to depolarisation of the plasma membrane; others in response to hyperpolarisation or an increase in intracellular calcium concentration; some can be regulated by binding of a transmitter, together with intracellular kinases; while others are regulated by GTP-binding proteins or other second messengers []. In eukaryotic cells, K+channels are involved in neural signalling and generation of the cardiac rhythm, act as effectors in signal transduction pathways involving G protein-coupled receptors (GPCRs) and may have a role in target cell lysis by cytotoxic T-lymphocytes []. In prokaryotic cells, they play a role in the maintenance of ionic homeostasis [].All K+channels discovered so far possess a core of alpha subunits, each comprising either one or two copies of a highly conserved pore loop domain (P-domain). The P-domain contains the sequence (T/SxxTxGxG), which has been termed the K+selectivity sequence. In families that contain one P-domain, four subunits assemble to form a selective pathway for K+across the membrane. However, it remains unclear how the 2 P-domain subunits assemble to form a selective pore. The functional diversity of these families can arise through homo- or hetero-associations of alpha subunits or association with auxiliary cytoplasmic beta subunits. K+channel subunits containing one pore domain can be assigned into one of two superfamilies: those that possess six transmembrane (TM) domains and those that possess only two TM domains. The six TM domain superfamily can be further subdivided into conserved gene families: the voltage-gated (Kv) channels; the KCNQ channels (originally known as KvLQT channels); the EAG-like K+channels; and three types of calcium (Ca)-activated K+channels (BK, IK and SK) []. The 2TM domain family comprises inward-rectifying K+channels. In addition, there are K+channel alpha-subunits that possess two P-domains. These are usually highly regulated K+selective leak channels.Two types of beta subunit (KCNE and KCNAB) are presently known to associate with voltage-gated alpha subunits (Kv, KCNQ and eag-like). However, not all combinations of alpha and beta subunits are possible. The KCNE family of K+ channel subunits are membrane glycoproteins that possess a single transmembrane (TM) domain. They share no structural relationship with the alpha subunit proteins, which possess pore forming domains. The subunits appear to have a regulatory function, modulating the kinetics and voltage dependence of the alpha subunits of voltage-dependent K+ channels. KCNE subunits are formed from short polypeptides of ~130 amino acids, and are divided into five subfamilies: KCNE1 (MinK/IsK), KCNE2 (MiRP1), KCNE3 (MiRP2), KCNE4 (MiRP3) and KCNE1L (AMMECR2). KCNE3 is known to associate with the pore forming subunits KCNQ1, KCNQ4,HERG and Kv3.4. KCNE3 forms complexes with Kv3.4 in skeletal muscle -KCNE3 mutations have been identified in families with skeletal muscledisorders []. In the intestine, KCNE3 associates with KCNQ1 to formchannels that are stimulated by cAMP and are thought to be involved insecretory diarrhoea and cystic fibrosis []. |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
103
 |
Fragment?: |
false |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
103
 |
Fragment?: |
false |
|
•
•
•
•
•
|
DO Term |
|
•
•
•
•
•
|
Publication |
First Author: |
Tempel BL |
Year: |
1988 |
Journal: |
Nature |
Title: |
Cloning of a probable potassium channel gene from mouse brain. |
Volume: |
332 |
Issue: |
6167 |
Pages: |
837-9 |
|
•
•
•
•
•
|
Publication |
First Author: |
Perney TM |
Year: |
1991 |
Journal: |
Curr Opin Cell Biol |
Title: |
The molecular biology of K+ channels. |
Volume: |
3 |
Issue: |
4 |
Pages: |
663-70 |
|
•
•
•
•
•
|
Publication |
First Author: |
Luneau C |
Year: |
1991 |
Journal: |
FEBS Lett |
Title: |
Shaw-like rat brain potassium channel cDNA's with divergent 3' ends. |
Volume: |
288 |
Issue: |
1-2 |
Pages: |
163-7 |
|
•
•
•
•
•
|
Publication |
First Author: |
Attali B |
Year: |
1992 |
Journal: |
J Biol Chem |
Title: |
Cloning, functional expression, and regulation of two K+ channels in human T lymphocytes. |
Volume: |
267 |
Issue: |
12 |
Pages: |
8650-7 |
|
•
•
•
•
•
|
Publication |
First Author: |
Schwarz TL |
Year: |
1988 |
Journal: |
Nature |
Title: |
Multiple potassium-channel components are produced by alternative splicing at the Shaker locus in Drosophila. |
Volume: |
331 |
Issue: |
6152 |
Pages: |
137-42 |
|
•
•
•
•
•
|
Publication |
First Author: |
Stühmer W |
Year: |
1989 |
Journal: |
EMBO J |
Title: |
Molecular basis of functional diversity of voltage-gated potassium channels in mammalian brain. |
Volume: |
8 |
Issue: |
11 |
Pages: |
3235-44 |
|
•
•
•
•
•
|
Publication |
First Author: |
Miller C |
Year: |
2000 |
Journal: |
Genome Biol |
Title: |
An overview of the potassium channel family. |
Volume: |
1 |
Issue: |
4 |
Pages: |
REVIEWS0004 |
|
•
•
•
•
•
|
Publication |
First Author: |
Piccini M |
Year: |
1999 |
Journal: |
Genomics |
Title: |
KCNE1-like gene is deleted in AMME contiguous gene syndrome: identification and characterization of the human and mouse homologs. |
Volume: |
60 |
Issue: |
3 |
Pages: |
251-7 |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
143
 |
Fragment?: |
false |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
170
 |
Fragment?: |
false |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
71
 |
Fragment?: |
false |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
64
 |
Fragment?: |
false |
|
•
•
•
•
•
|
Protein |
Organism: |
Mus musculus/domesticus |
Length: |
192
 |
Fragment?: |
false |
|
•
•
•
•
•
|
Publication |
First Author: |
McCrossan ZA |
Year: |
2009 |
Journal: |
J Membr Biol |
Title: |
Regulation of the Kv2.1 potassium channel by MinK and MiRP1. |
Volume: |
228 |
Issue: |
1 |
Pages: |
1-14 |
|
•
•
•
•
•
|
Protein Domain |
Type: |
Family |
Description: |
Two types of beta subunit (KCNE and KCNAB) are presently known to associate with voltage-gated alpha subunits (Kv, KCNQ and eag-like). However, not all combinations of alpha and beta subunits are possible. The KCNE family of K+ channel subunits are membrane glycoproteins that possess a single transmembrane (TM) domain. They share no structural relationship with the alpha subunit proteins, which possess pore forming domains. The subunits appear to have a regulatory function, modulating the kinetics and voltage dependence of the alpha subunits of voltage-dependent K+ channels. KCNE subunits are formed from short polypeptides of ~130 amino acids, and are divided into five subfamilies: KCNE1 (MinK/IsK), KCNE2 (MiRP1), KCNE3 (MiRP2), KCNE4 (MiRP3) and KCNE1L (AMMECR2). Potassium channels are the most diverse group of the ion channel family [, ]. They are important in shaping the action potential, and in neuronal excitability and plasticity []. The potassium channel family is composed of several functionally distinct isoforms, which can be broadly separated into 2 groups []: the practically non-inactivating 'delayed' group and the rapidly inactivating 'transient' group.These are all highly similar proteins, with only small amino acid changes causing the diversity of the voltage-dependent gating mechanism, channel conductance and toxin binding properties. Each type of K+channel is activated by different signals and conditions depending on their type of regulation: some open in response to depolarisation of the plasma membrane; others in response to hyperpolarisation or an increase in intracellular calcium concentration; some can be regulated by binding of a transmitter, together with intracellular kinases; while others are regulated by GTP-binding proteins or other second messengers []. In eukaryotic cells, K+channels are involved in neural signalling and generation of the cardiac rhythm, act as effectors in signal transduction pathways involving G protein-coupled receptors (GPCRs) and may have a role in target cell lysis by cytotoxic T-lymphocytes []. In prokaryotic cells, they play a role in the maintenance of ionic homeostasis [].All K+channels discovered so far possess a core of alpha subunits, each comprising either one or two copies of a highly conserved pore loop domain (P-domain). The P-domain contains the sequence (T/SxxTxGxG), which has been termed the K+selectivity sequence. In families that contain one P-domain, four subunits assemble to form a selective pathway for K+across the membrane. However, it remains unclear how the 2 P-domain subunits assemble to form a selective pore. The functional diversity of these families can arise through homo- or hetero-associations of alpha subunits or association with auxiliary cytoplasmic beta subunits. K+channel subunits containing one pore domain can be assigned into one of two superfamilies: those that possess six transmembrane (TM) domains and those that possess only two TM domains. The six TM domain superfamily can be further subdivided into conserved gene families: the voltage-gated (Kv) channels; the KCNQ channels (originally known as KvLQT channels); the EAG-like K+channels; and three types of calcium (Ca)-activated K+channels (BK, IK and SK) []. The 2TM domain family comprises inward-rectifying K+channels. In addition, there are K+channel alpha-subunits that possess two P-domains. These are usually highly regulated K+selective leak channels. |
|
•
•
•
•
•
|
Protein Domain |
Type: |
Family |
Description: |
KCNE1 (Potassium voltage-gated channel subfamily E member 1, also known as Mink) subunits associate with KCNQ1 alpha subunits to form channels that are responsible for the IkS currents that determine the duration of the action potential in cardiac muscle []. Mutations in both of the genes encoding these subunits cause an inherited disorder that increases the risk of death from cardiac arrhythmia (long QT syndrome type 1) and Jervell and Lange-Nielsen syndrome, associated with congenital deafness [].Two types of beta subunit (KCNE and KCNAB) are presently known to associate with voltage-gated alpha subunits (Kv, KCNQ and eag-like). However, not all combinations of alpha and beta subunits are possible. The KCNE family of K+ channel subunits are membrane glycoproteins that possess a single transmembrane (TM) domain. They share no structural relationship with the alpha subunit proteins, which possess pore forming domains. The subunits appear to have a regulatory function, modulating the kinetics and voltage dependence of the alpha subunits of voltage-dependent K+ channels. KCNE subunits are formed from short polypeptides of ~130 amino acids, and are divided into five subfamilies: KCNE1 (MinK/IsK), KCNE2 (MiRP1), KCNE3 (MiRP2), KCNE4 (MiRP3) and KCNE1L (AMMECR2). Potassium channels are the most diverse group of the ion channel family [, ]. They are important in shaping the action potential, and in neuronal excitability and plasticity []. The potassium channel family is composed of several functionally distinct isoforms, which can be broadly separated into 2 groups []: the practically non-inactivating 'delayed' group and the rapidly inactivating 'transient' group.These are all highly similar proteins, with only small amino acid changes causing the diversity of the voltage-dependent gating mechanism, channel conductance and toxin binding properties. Each type of K+channel is activated by different signals and conditions depending on their type of regulation: some open in response to depolarisation of the plasma membrane; others in response to hyperpolarisation or an increase in intracellular calcium concentration; some can be regulated by binding of a transmitter, together with intracellular kinases; while others are regulated by GTP-binding proteins or other second messengers []. In eukaryotic cells, K+channels are involved in neural signalling and generation of the cardiac rhythm, act as effectors in signal transduction pathways involving G protein-coupled receptors (GPCRs) and may have a role in target cell lysis by cytotoxic T-lymphocytes []. In prokaryotic cells, they play a role in the maintenance of ionic homeostasis [].All K+channels discovered so far possess a core of alpha subunits, each comprising either one or two copies of a highly conserved pore loop domain (P-domain). The P-domain contains the sequence (T/SxxTxGxG), which has been termed the K+selectivity sequence. In families that contain one P-domain, four subunits assemble to form a selective pathway for K+across the membrane. However, it remains unclear how the 2 P-domain subunits assemble to form a selective pore. The functional diversity of these families can arise through homo- or hetero-associations of alpha subunits or association with auxiliary cytoplasmic beta subunits. K+channel subunits containing one pore domain can be assigned into one of two superfamilies: those that possess six transmembrane (TM) domains and those that possess only two TM domains. The six TM domain superfamily can be further subdivided into conserved gene families: the voltage-gated (Kv) channels; the KCNQ channels (originally known as KvLQT channels); the EAG-like K+channels; and three types of calcium (Ca)-activated K+channels (BK, IK and SK) []. The 2TM domain family comprises inward-rectifying K+channels. In addition, there are K+channel alpha-subunits that possess two P-domains. These are usually highly regulated K+selective leak channels. |
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Protein Domain |
Type: |
Family |
Description: |
Potassium channels are the most diverse group of the ion channel family [, ]. They are important in shaping the action potential, and in neuronal excitability and plasticity []. The potassium channel family is composed of several functionally distinct isoforms, which can be broadly separated into 2 groups []: the practically non-inactivating 'delayed' group and the rapidly inactivating 'transient' group.These are all highly similar proteins, with only small amino acid changes causing the diversity of the voltage-dependent gating mechanism, channel conductance and toxin binding properties. Each type of K+channel is activated by different signals and conditions depending on their type of regulation: some open in response to depolarisation of the plasma membrane; others in response to hyperpolarisation or an increase in intracellular calcium concentration; some can be regulated by binding of a transmitter, together with intracellular kinases; while others are regulated by GTP-binding proteins or other second messengers []. In eukaryotic cells, K+channels are involved in neural signalling and generation of the cardiac rhythm, act as effectors in signal transduction pathways involving G protein-coupled receptors (GPCRs) and may have a role in target cell lysis by cytotoxic T-lymphocytes []. In prokaryotic cells, they play a role in the maintenance of ionic homeostasis [].All K+channels discovered so far possess a core of alpha subunits, each comprising either one or two copies of a highly conserved pore loop domain (P-domain). The P-domain contains the sequence (T/SxxTxGxG), which has been termed the K+selectivity sequence. In families that contain one P-domain, four subunits assemble to form a selective pathway for K+across the membrane. However, it remains unclear how the 2 P-domain subunits assemble to form a selective pore. The functional diversity of these families can arise through homo- or hetero-associations of alpha subunits or association with auxiliary cytoplasmic beta subunits. K+channel subunits containing one pore domain can be assigned into one of two superfamilies: those that possess six transmembrane (TM) domains and those that possess only two TM domains. The six TM domain superfamily can be further subdivided into conserved gene families: the voltage-gated (Kv) channels; the KCNQ channels (originally known as KvLQT channels); the EAG-like K+channels; and three types of calcium (Ca)-activated K+channels (BK, IK and SK) []. The 2TM domain family comprises inward-rectifying K+channels. In addition, there are K+channel alpha-subunits that possess two P-domains. These are usually highly regulated K+selective leak channels.Two types of beta subunit (KCNE and KCNAB) are presently known to associate with voltage-gated alpha subunits (Kv, KCNQ and eag-like). However, not all combinations of alpha and beta subunits are possible. The KCNE family of K+ channel subunits are membrane glycoproteins that possess a single transmembrane (TM) domain. They share no structural relationship with the alpha subunit proteins, which possess pore forming domains. The subunits appear to have a regulatory function, modulating the kinetics and voltage dependence of the alpha subunits of voltage-dependent K+ channels. KCNE subunits are formed from short polypeptides of ~130 amino acids, and are divided into five subfamilies: KCNE1 (MinK/IsK), KCNE2 (MiRP1), KCNE3 (MiRP2), KCNE4 (MiRP3) and KCNE1L (AMMECR2). KCNE2 subunits associate with the eag-like HERG alpha subunits, which arethe pore-forming subunits of cardiac IKr channels. Channels formed solelyfrom HERG subunits display similar properties to native IKr channels;however, they differ in their gating and single channel conductance. Channels formed from both KCNE2 and HERG exhibit properties that are identical to those seen in native IKr channels. Three mutations in the KCNE2gene are associated with long QT syndrome and ventricular fibrillation. These mutations result in channels that open slower and close more rapidly,the net effect being a reduced K+ current []. |
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Protein |
Organism: |
Mus musculus/domesticus |
Length: |
129
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Fragment?: |
false |
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Protein |
Organism: |
Mus musculus/domesticus |
Length: |
123
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Fragment?: |
false |
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Protein |
Organism: |
Mus musculus/domesticus |
Length: |
129
 |
Fragment?: |
false |
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Protein |
Organism: |
Mus musculus/domesticus |
Length: |
123
 |
Fragment?: |
false |
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