Q15878 (CAC1E_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 128.
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: Voltage-dependent R-type calcium channel subunit alpha-1E Alternative name(s): Brain calcium channel II Short name=BII Calcium channel, L type, alpha-1 polypeptide, isoform 6 Voltage-gated calcium channel subunit alpha Cav2.3 | ||||
| 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 | 2313 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1E gives rise to R-type calcium currents. R-type calcium channels belong to the 'high-voltage activated' (HVA) group and are blocked by nickel, and partially by omega-agatoxin-IIIA (omega-Aga-IIIA). They are however insensitive to dihydropyridines (DHP), omega-conotoxin-GVIA (omega-CTx-GVIA), and omega-agatoxin-IVA (omega-Aga-IVA). Calcium channels containing alpha-1E subunit could be involved in the modulation of firing patterns of neurons which is important for information processing. |
| Subunit structure | Interacts with EFHC1. Voltage-dependent calcium channels are multisubunit complexes, consisting of alpha-1, alpha-2, beta and delta subunits in a 1:1:1:1 ratio. The channel activity is directed by the pore-forming and voltage-sensitive alpha-1 subunit. In many cases, this subunit is sufficient to generate voltage-sensitive calcium channel activity. The auxiliary subunits beta and alpha-2/delta linked by a disulfide bridge regulate the channel activity. Ref.4 |
| Subcellular location | |
| Tissue specificity | Expressed in neuronal tissues and in kidney. |
| Domain | Each of the four internal repeats contains five hydrophobic transmembrane segments (S1, S2, S3, S5, S6) and one positively charged transmembrane segment (S4). S4 segments probably represent the voltage-sensor and are characterized by a series of positively charged amino acids at every third position. |
| Sequence similarities | Belongs to the calcium channel alpha-1 subunit (TC 1.A.1.11) family. CACNA1E subfamily. [View classification] Contains 1 EF-hand domain. |
Ontologies
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q15878-1) Also known as: Alpha-1E; 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: Q15878-2) Also known as: Alpha-1E-1; The sequence of this isoform differs from the canonical sequence as follows: 748-766: Missing. 1967-2009: Missing. | ||||||
| Isoform 3 (identifier: Q15878-3) Also known as: Alpha-1E-3; The sequence of this isoform differs from the canonical sequence as follows: 1967-2009: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||
Molecule processing | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 2313 | 2313 | Voltage-dependent R-type calcium channel subunit alpha-1E | PRO_0000053938 | |||||||
Regions | |||||||||||
| Topological domain | 1 – 89 | 89 | Cytoplasmic Potential | ||||||||
| Transmembrane | 90 – 108 | 19 | Helical; Name=S1 of repeat I | ||||||||
| Topological domain | 109 – 127 | 19 | Extracellular Potential | ||||||||
| Transmembrane | 128 – 146 | 19 | Helical; Name=S2 of repeat I | ||||||||
| Topological domain | 147 – 158 | 12 | Cytoplasmic Potential | ||||||||
| Transmembrane | 159 – 173 | 15 | Helical; Name=S3 of repeat I | ||||||||
| Topological domain | 174 – 185 | 12 | Extracellular Potential | ||||||||
| Transmembrane | 186 – 205 | 20 | Helical; Name=S4 of repeat I | ||||||||
| Topological domain | 206 – 223 | 18 | Cytoplasmic Potential | ||||||||
| Transmembrane | 224 – 244 | 21 | Helical; Name=S5 of repeat I | ||||||||
| Topological domain | 245 – 326 | 82 | Extracellular Potential | ||||||||
| Transmembrane | 327 – 350 | 24 | Helical; Name=S6 of repeat I | ||||||||
| Topological domain | 351 – 476 | 126 | Cytoplasmic Potential | ||||||||
| Transmembrane | 477 – 496 | 20 | Helical; Name=S1 of repeat II | ||||||||
| Topological domain | 497 – 509 | 13 | Extracellular Potential | ||||||||
| Transmembrane | 510 – 529 | 20 | Helical; Name=S2 of repeat II | ||||||||
| Topological domain | 530 – 538 | 9 | Cytoplasmic Potential | ||||||||
| Transmembrane | 539 – 557 | 19 | Helical; Name=S3 of repeat II | ||||||||
| Topological domain | 558 – 567 | 10 | Extracellular Potential | ||||||||
| Transmembrane | 568 – 586 | 19 | Helical; Name=S4 of repeat II | ||||||||
| Topological domain | 587 – 605 | 19 | Cytoplasmic Potential | ||||||||
| Transmembrane | 606 – 625 | 20 | Helical; Name=S5 of repeat II | ||||||||
| Topological domain | 626 – 678 | 53 | Extracellular Potential | ||||||||
| Transmembrane | 679 – 703 | 25 | Helical; Name=S6 of repeat II | ||||||||
| Topological domain | 704 – 1148 | 445 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1149 – 1165 | 17 | Helical; Name=S1 of repeat III | ||||||||
| Topological domain | 1166 – 1189 | 24 | Extracellular Potential | ||||||||
| Transmembrane | 1190 – 1209 | 20 | Helical; Name=S2 of repeat III | ||||||||
| Topological domain | 1210 – 1217 | 8 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1218 – 1240 | 23 | Helical; Name=S3 of repeat III | ||||||||
| Topological domain | 1241 – 1254 | 14 | Extracellular Potential | ||||||||
| Transmembrane | 1255 – 1272 | 18 | Helical; Name=S4 of repeat III | ||||||||
| Topological domain | 1273 – 1291 | 19 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1292 – 1311 | 20 | Helical; Name=S5 of repeat III | ||||||||
| Topological domain | 1312 – 1398 | 87 | Extracellular Potential | ||||||||
| Transmembrane | 1399 – 1422 | 24 | Helical; Name=S6 of repeat III | ||||||||
| Topological domain | 1423 – 1479 | 57 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1480 – 1498 | 19 | Helical; Name=S1 of repeat IV | ||||||||
| Topological domain | 1499 – 1513 | 15 | Extracellular Potential | ||||||||
| Transmembrane | 1514 – 1533 | 20 | Helical; Name=S2 of repeat IV | ||||||||
| Topological domain | 1534 – 1541 | 8 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1542 – 1560 | 19 | Helical; Name=S3 of repeat IV | ||||||||
| Topological domain | 1561 – 1571 | 11 | Extracellular Potential | ||||||||
| Transmembrane | 1572 – 1590 | 19 | Helical; Name=S4 of repeat IV | ||||||||
| Topological domain | 1591 – 1609 | 19 | Cytoplasmic Potential | ||||||||
| Transmembrane | 1610 – 1629 | 20 | Helical; Name=S5 of repeat IV | ||||||||
| Topological domain | 1630 – 1698 | 69 | Extracellular Potential | ||||||||
| Transmembrane | 1699 – 1724 | 26 | Helical; Name=S6 of repeat IV | ||||||||
| Topological domain | 1725 – 2313 | 589 | Cytoplasmic Potential | ||||||||
| Repeat | 76 – 354 | 279 | I | ||||||||
| Repeat | 462 – 706 | 245 | II | ||||||||
| Repeat | 1140 – 1426 | 287 | III | ||||||||
| Repeat | 1463 – 1726 | 264 | IV | ||||||||
| Domain | 1739 – 1774 | 36 | EF-hand | ||||||||
| Calcium binding | 426 – 437 | 12 | By similarity | ||||||||
| Calcium binding | 1752 – 1763 | 12 | By similarity | ||||||||
| Region | 374 – 391 | 18 | Binding to the beta subunit By similarity | ||||||||
| Compositional bias | 716 – 721 | 6 | Poly-Glu | ||||||||
| Compositional bias | 748 – 753 | 6 | Poly-Arg | ||||||||
| Compositional bias | 767 – 772 | 6 | Poly-Arg | ||||||||
| Compositional bias | 1228 – 1231 | 4 | Poly-Val | ||||||||
| Compositional bias | 2284 – 2288 | 5 | Poly-Arg | ||||||||
Sites | |||||||||||
| Site | 309 | 1 | Calcium ion selectivity and permeability By similarity | ||||||||
| Site | 657 | 1 | Calcium ion selectivity and permeability By similarity | ||||||||
| Site | 1372 | 1 | Calcium ion selectivity and permeability By similarity | ||||||||
| Site | 1663 | 1 | Calcium ion selectivity and permeability By similarity | ||||||||
Amino acid modifications | |||||||||||
| Modified residue | 14 | 1 | Phosphoserine By similarity | ||||||||
| Modified residue | 28 | 1 | Phosphothreonine By similarity | ||||||||
| Modified residue | 736 | 1 | Phosphoserine By similarity | ||||||||
| Modified residue | 855 | 1 | Phosphoserine By similarity | ||||||||
| Modified residue | 1734 | 1 | Phosphoserine; by PKA Potential | ||||||||
| Modified residue | 2113 | 1 | Phosphoserine By similarity | ||||||||
| Modified residue | 2137 | 1 | Phosphoserine By similarity | ||||||||
| Glycosylation | 254 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 1566 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 1571 | 1 | N-linked (GlcNAc...) Potential | ||||||||
Natural variations | |||||||||||
| Alternative sequence | 748 – 766 | 19 | Missing in isoform 2. | VSP_000937 | |||||||
| Alternative sequence | 1967 – 2009 | 43 | Missing in isoform 2 and isoform 3. | VSP_024817 | |||||||
| Natural variant | 859 | 1 | D → E. Corresponds to variant rs35737760 [ dbSNP | Ensembl ]. | VAR_031912 | |||||||
| Natural variant | 1955 | 1 | A → T. Ref.1 Corresponds to variant rs704326 [ dbSNP | Ensembl ]. | VAR_046996 | |||||||
Experimental info | |||||||||||
| Sequence conflict | 648 | 1 | M → I in AAA72125. Ref.1 | ||||||||
| Sequence conflict | 836 – 838 | 3 | LAL → WP in AAA72125. Ref.1 | ||||||||
| Sequence conflict | 2077 | 1 | R → P in AAA59204. Ref.2 | ||||||||
| Sequence conflict | 2077 | 1 | R → P in AAA59205. Ref.2 | ||||||||
| Sequence conflict | 2084 | 1 | G → R in AAA59204. Ref.2 | ||||||||
| Sequence conflict | 2084 | 1 | G → R in AAA59205. Ref.2 | ||||||||
| Sequence conflict | 2206 | 1 | C → W in AAA59204. Ref.2 | ||||||||
| Sequence conflict | 2206 | 1 | C → W in AAA59205. Ref.2 | ||||||||
| Sequence conflict | 2219 | 1 | S → R in AAA59204. Ref.2 | ||||||||
| Sequence conflict | 2219 | 1 | S → R in AAA59205. Ref.2 | ||||||||
| Sequence conflict | 2245 | 1 | G → V in AAA59204. Ref.2 | ||||||||
| Sequence conflict | 2245 | 1 | G → V in AAA59205. Ref.2 | ||||||||
Secondary structure | |||||||||||
Helix Strand Turn | |||||||||||
| Helix | 1868 – 1882 | 15 | |||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Molecular analysis and functional expression of the human type E neuronal Ca2+ channel alpha 1 subunit." Schneider T., Wei X., Olcese R., Costantin J.L., Neely A., Palade P., Perez-Reyes E., Qin N., Zhou J., Crawford G.D., Smith R.G., Appel S.H., Stefani E., Birnbaumer M. Recept. Channels 2:255-270(1994) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), VARIANT THR-1955. Tissue: Brain. |
| [2] | "Structure and functional characterization of neuronal alpha 1E calcium channel subtypes." Williams M.E., Marubio L.M., Deal C.R., Hans M., Brust P.F., Philipson L.H., Miller R.J., Johnson E.C., Harpold M.M., Ellis S.B. J. Biol. Chem. 269:22347-22357(1994) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 2 AND 3). Tissue: Hippocampus. |
| [3] | "The DNA sequence and biological annotation of human chromosome 1." Gregory S.G., Barlow K.F., McLay K.E., Kaul R., Swarbreck D., Dunham A., Scott C.E., Howe K.L., Woodfine K., Spencer C.C.A., Jones M.C., Gillson C., Searle S., Zhou Y., Kokocinski F., McDonald L., Evans R., Phillips K. Bentley D.R.Nature 441:315-321(2006) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [4] | "Mutations in EFHC1 cause juvenile myoclonic epilepsy." Suzuki T., Delgado-Escueta A.V., Aguan K., Alonso M.E., Shi J., Hara Y., Nishida M., Numata T., Medina M.T., Takeuchi T., Morita R., Bai D., Ganesh S., Sugimoto Y., Inazawa J., Bailey J.N., Ochoa A., Jara-Prado A. Yamakawa K.Nat. Genet. 36:842-849(2004) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH CACNA1E. |
| [5] | "Crystal structure of the CaV2 IQ domain in complex with Ca2+/calmodulin: high-resolution mechanistic implications for channel regulation by Ca2+." Mori M.X., Vander Kooi C.W., Leahy D.J., Yue D.T. Structure 16:607-620(2008) [PubMed] [Europe PMC] [Abstract] Cited for: X-RAY CRYSTALLOGRAPHY (2.3 ANGSTROMS) OF 1867-1885. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EMBL GenBank DDBJ | L27745 mRNA. Translation: AAA72125.1. L29384 mRNA. Translation: AAA59204.1. L29385 mRNA. Translation: AAA59205.1. AL161734 AL590998 Genomic DNA. Translation: CAH72675.1.AL161734 AL590998 Genomic DNA. Translation: CAH72676.1.AL161734 AL590998 Genomic DNA. Translation: CAH72677.1.AL359270 AL590998 Genomic DNA. Translation: CAI14653.1.AL359270 AL590998 Genomic DNA. Translation: CAI14654.1.AL359270 AL590998 Genomic DNA. Translation: CAI14655.1.AL160059 AL590998 Genomic DNA. Translation: CAI17081.1.AL160059 AL590998 Genomic DNA. Translation: CAI17082.1.AL160059 AL590998 Genomic DNA. Translation: CAI17083.1.AL590998 AL359270 Genomic DNA. Translation: CAI22327.1.AL590998 AL359270 Genomic DNA. Translation: CAI22328.1.AL590998 AL359270 Genomic DNA. Translation: CAI22329.1. | ||||||||||||
| IPI | IPI00165045. IPI00218338. IPI00472283. | ||||||||||||
| PIR | A54972. B54972. | ||||||||||||
| RefSeq | NP_000712.2. NM_000721.3. NP_001192222.1. NM_001205293.1. NP_001192223.1. NM_001205294.1. | ||||||||||||
| UniGene | Hs.437444. | ||||||||||||
3D structure databases | |||||||||||||
| PDBe RCSB PDB PDBj |
| ||||||||||||
| ProteinModelPortal | Q15878. | ||||||||||||
| ModBase | Search... | ||||||||||||
Protein-protein interaction databases | |||||||||||||
| STRING | 9606.ENSP00000356545. | ||||||||||||
PTM databases | |||||||||||||
| PhosphoSite | Q15878. | ||||||||||||
Polymorphism databases | |||||||||||||
| DMDM | 209572758. | ||||||||||||
Proteomic databases | |||||||||||||
| PaxDb | Q15878. | ||||||||||||
| PRIDE | Q15878. | ||||||||||||
Protocols and materials databases | |||||||||||||
| StructuralBiologyKnowledgebase | Search... | ||||||||||||
Genome annotation databases | |||||||||||||
| Ensembl | ENST00000367570; ENSP00000356542; ENSG00000198216. ENST00000367573; ENSP00000356545; ENSG00000198216. ENST00000526775; ENSP00000434814; ENSG00000198216. | ||||||||||||
| GeneID | 777. | ||||||||||||
| KEGG | hsa:777. | ||||||||||||
| UCSC | uc001gow.3. human. uc009wxs.3. human. uc009wxt.3. human. | ||||||||||||
Organism-specific databases | |||||||||||||
| CTD | 777. | ||||||||||||
| GeneCards | GC01P181382. | ||||||||||||
| HGNC | HGNC:1392. CACNA1E. | ||||||||||||
| HPA | HPA042515. | ||||||||||||
| MIM | 601013. gene. | ||||||||||||
| neXtProt | NX_Q15878. | ||||||||||||
| PharmGKB | PA26009. | ||||||||||||
| GenAtlas | Search... | ||||||||||||
Phylogenomic databases | |||||||||||||
| eggNOG | COG1226. | ||||||||||||
| HOGENOM | HOG000231530. | ||||||||||||
| HOVERGEN | HBG050763. | ||||||||||||
| InParanoid | Q15878. | ||||||||||||
| KO | K04852. | ||||||||||||
| OMA | HHMSVWE. | ||||||||||||
| OrthoDB | EOG45B1DN. | ||||||||||||
Enzyme and pathway databases | |||||||||||||
| Reactome | REACT_111217. Metabolism. REACT_13685. Neuronal System. | ||||||||||||
Gene expression databases | |||||||||||||
| ArrayExpress | Q15878. | ||||||||||||
| Bgee | Q15878. | ||||||||||||
| CleanEx | HS_CACNA1E. | ||||||||||||
| Genevestigator | Q15878. | ||||||||||||
| GermOnline | ENSG00000198216. Homo sapiens. | ||||||||||||
Family and domain databases | |||||||||||||
| InterPro | IPR002048. EF_hand_dom. IPR005821. Ion_trans_dom. IPR014873. VDCC_a1su_IQ. IPR005449. VDCC_R_a1su. IPR002077. VDCCAlpha1. [Graphical view] | ||||||||||||
| PANTHER | PTHR10037:SF57. PTHR10037:SF57. 1 hit. | ||||||||||||
| Pfam | PF08763. Ca_chan_IQ. 1 hit. PF00520. Ion_trans. 4 hits. [Graphical view] | ||||||||||||
| PRINTS | PR00167. CACHANNEL. PR01633. RVDCCALPHA1. | ||||||||||||
| SMART | SM01062. Ca_chan_IQ. 1 hit. [Graphical view] | ||||||||||||
| PROSITE | PS50222. EF_HAND_2. 1 hit. [Graphical view] | ||||||||||||
| ProtoNet | Search... | ||||||||||||
Other | |||||||||||||
| BindingDB | Q15878. | ||||||||||||
| ChEMBL | CHEMBL1687682. | ||||||||||||
| EvolutionaryTrace | Q15878. | ||||||||||||
| GenomeRNAi | 777. | ||||||||||||
| NextBio | 3140. | ||||||||||||
| SOURCE | Search... | ||||||||||||
Entry information
| Entry name | CAC1E_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q15878 Secondary accession number(s): B1AM12 Q14581 | ||||||||
| 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 1 Human chromosome 1: 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 |
| PDB cross-references Index of Protein Data Bank (PDB) cross-references |
| SIMILARITY comments Index of protein domains and families |

Clusters with
