UniProtKB - Q6AXS0 (NCLX_RAT)
Protein
Mitochondrial sodium/calcium exchanger protein
Gene
Slc8b1
Organism
Rattus norvegicus (Rat)
Status
Functioni
Mitochondrial sodium/calcium antiporter that mediates sodium-dependent calcium efflux from mitochondrion, by mediating the exchange of 3 sodium ions per 1 calcium ion. Plays a central role in mitochondrial calcium homeostasis by mediating mitochondrial calcium extrusion: calcium efflux is essential for mitochondrial function and cell survival, notably in cardiomyocytes (By similarity). Regulates rates of glucose-dependent insulin secretion in pancreatic beta-cells during the first phase of insulin secretion: acts by mediating efflux of calcium from mitochondrion, thereby affecting cytoplasmic calcium responses. Required for store-operated Ca2+ entry (SOCE) and Ca2+ release-activated Ca2+ (CRAC) channel regulation: sodium transport by SLC8B1 leads to promote calcium-shuttling that modulates mitochondrial redox status, thereby regulating SOCE activity (By similarity). Involved in B-lymphocyte chemotaxis (By similarity). Able to transport Ca2+ in exchange of either Li+ or Na+, explaining how Li+ catalyzes Ca2+ exchange. In contrast to other members of the family its function is independent of K+ (By similarity).By similarity
Activity regulationi
Inhibited by the sodium/calcium exchanger inhibitor CGP-37157. Strongly inhibited by zinc.By similarity
GO - Molecular functioni
- calcium:sodium antiporter activity Source: UniProtKB
- calcium:sodium antiporter activity involved in regulation of cardiac muscle cell membrane potential Source: UniProtKB
- cation transmembrane transporter activity Source: GO_Central
- identical protein binding Source: RGD
- protein homodimerization activity Source: BHF-UCL
GO - Biological processi
- calcium export from the mitochondrion Source: UniProtKB
- calcium ion transmembrane transport Source: RGD
- cation transport Source: GO_Central
- cellular calcium ion homeostasis Source: GO_Central
- glucose homeostasis Source: UniProtKB
- mitochondrial calcium ion homeostasis Source: UniProtKB
- mitochondrial calcium ion transmembrane transport Source: UniProtKB
- regulation of cytosolic calcium ion concentration Source: BHF-UCL
- regulation of insulin secretion Source: UniProtKB
- regulation of lymphocyte chemotaxis Source: UniProtKB
- regulation of store-operated calcium entry Source: UniProtKB
- response to stimulus Source: UniProtKB-KW
- sodium ion transmembrane transport Source: RGD
Keywordsi
Biological process | Antiport, Calcium transport, Ion transport, Sensory transduction, Sodium transport, Transport |
Ligand | Calcium, Lithium, Sodium |
Enzyme and pathway databases
Reactomei | R-RNO-425561, Sodium/Calcium exchangers R-RNO-8949215, Mitochondrial calcium ion transport |
Names & Taxonomyi
Protein namesi | Recommended name: Mitochondrial sodium/calcium exchanger proteinCuratedAlternative name(s): Na(+)/K(+)/Ca(2+)-exchange protein 61 Publication Sodium/calcium exchanger protein, mitochondrial1 Publication Sodium/potassium/calcium exchanger 61 Publication Solute carrier family 24 member 6Imported Solute carrier family 8 member B1Imported |
Gene namesi | |
Organismi | Rattus norvegicus (Rat) |
Taxonomic identifieri | 10116 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Myomorpha › Muroidea › Muridae › Murinae › Rattus |
Proteomesi |
|
Organism-specific databases
RGDi | 1565818, Slc8b1 |
Subcellular locationi
Mitochondrion
- Mitochondrion inner membrane 2 Publications; Multi-pass membrane protein 2 Publications
Mitochondrion
- integral component of mitochondrial membrane Source: UniProtKB
- mitochondrial crista Source: BHF-UCL
- mitochondrial inner membrane Source: MGI
- mitochondrion Source: BHF-UCL
Plasma Membrane
- plasma membrane Source: RGD
- sarcolemma Source: MGI
Other locations
- membrane Source: GO_Central
Topology
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Topological domaini | 27 – 95 | ExtracellularSequence analysisAdd BLAST | 69 | |
Transmembranei | 96 – 116 | Helical; Name=1Sequence analysisAdd BLAST | 21 | |
Topological domaini | 117 – 140 | CytoplasmicSequence analysisAdd BLAST | 24 | |
Transmembranei | 141 – 161 | Helical; Name=2Sequence analysisAdd BLAST | 21 | |
Topological domaini | 162 – 168 | ExtracellularSequence analysis | 7 | |
Transmembranei | 169 – 189 | Helical; Name=3Sequence analysisAdd BLAST | 21 | |
Topological domaini | 190 – 205 | CytoplasmicSequence analysisAdd BLAST | 16 | |
Transmembranei | 206 – 226 | Helical; Name=4Sequence analysisAdd BLAST | 21 | |
Topological domaini | 227 | ExtracellularSequence analysis | 1 | |
Transmembranei | 228 – 247 | Helical; Name=5Sequence analysisAdd BLAST | 20 | |
Topological domaini | 248 – 325 | CytoplasmicSequence analysisAdd BLAST | 78 | |
Transmembranei | 326 – 346 | Helical; Name=6Sequence analysisAdd BLAST | 21 | |
Topological domaini | 347 – 360 | ExtracellularSequence analysisAdd BLAST | 14 | |
Transmembranei | 361 – 381 | Helical; Name=7Sequence analysisAdd BLAST | 21 | |
Topological domaini | 382 – 383 | CytoplasmicSequence analysis | 2 | |
Transmembranei | 384 – 404 | Helical; Name=8Sequence analysisAdd BLAST | 21 | |
Topological domaini | 405 – 416 | ExtracellularSequence analysisAdd BLAST | 12 | |
Transmembranei | 417 – 437 | Helical; Name=9Sequence analysisAdd BLAST | 21 | |
Topological domaini | 438 – 445 | CytoplasmicSequence analysis | 8 | |
Transmembranei | 446 – 466 | Helical; Name=10Sequence analysisAdd BLAST | 21 | |
Topological domaini | 467 – 491 | ExtracellularSequence analysisAdd BLAST | 25 | |
Transmembranei | 492 – 512 | Helical; Name=11Sequence analysisAdd BLAST | 21 | |
Topological domaini | 513 – 525 | CytoplasmicSequence analysisAdd BLAST | 13 | |
Transmembranei | 526 – 546 | Helical; Name=12Sequence analysisAdd BLAST | 21 | |
Topological domaini | 547 – 559 | ExtracellularSequence analysisAdd BLAST | 13 | |
Transmembranei | 560 – 580 | Helical; Name=13Sequence analysisAdd BLAST | 21 | |
Topological domaini | 581 – 585 | CytoplasmicSequence analysis | 5 |
Keywords - Cellular componenti
Membrane, Mitochondrion, Mitochondrion inner membranePTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Transit peptidei | 1 – 26 | MitochondrionSequence analysisAdd BLAST | 26 | |
ChainiPRO_0000045758 | 27 – 585 | Mitochondrial sodium/calcium exchanger proteinAdd BLAST | 559 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Glycosylationi | 46 | N-linked (GlcNAc...) asparagineSequence analysis | 1 | |
Modified residuei | 258 | Phosphoserine; by PKABy similarity | 1 |
Post-translational modificationi
Phosphorylation at Ser-258 by PKA prevents calcium overload.By similarity
Keywords - PTMi
Glycoprotein, PhosphoproteinProteomic databases
PaxDbi | Q6AXS0 |
PRIDEi | Q6AXS0 |
PTM databases
GlyGeni | Q6AXS0, 1 site |
Expressioni
Tissue specificityi
Widely expressed. Present at higher level in pancreas, stomach, skeletal muscle and skin (at protein level). Ubiquitously expressed.2 Publications
Gene expression databases
Bgeei | ENSRNOG00000001383, Expressed in spleen and 21 other tissues |
Genevisiblei | Q6AXS0, RN |
Interactioni
GO - Molecular functioni
- identical protein binding Source: RGD
- protein homodimerization activity Source: BHF-UCL
Protein-protein interaction databases
STRINGi | 10116.ENSRNOP00000034026 |
Family & Domainsi
Sequence similaritiesi
Belongs to the Ca(2+):cation antiporter (CaCA) (TC 2.A.19) family. SLC24A subfamily. [View classification]Curated
Keywords - Domaini
Transit peptide, Transmembrane, Transmembrane helixPhylogenomic databases
eggNOGi | KOG2399, Eukaryota |
GeneTreei | ENSGT00940000157433 |
HOGENOMi | CLU_004979_3_2_1 |
InParanoidi | Q6AXS0 |
OMAi | WIMNIAN |
OrthoDBi | 478735at2759 |
PhylomeDBi | Q6AXS0 |
TreeFami | TF323444 |
Family and domain databases
InterProi | View protein in InterPro IPR004837, NaCa_Exmemb |
Pfami | View protein in Pfam PF01699, Na_Ca_ex, 2 hits |
i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
Q6AXS0-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MAGRWLDPLW APGFLCVALI LETASGAGDL STKAHGHIQF SARGVNQTAM
60 70 80 90 100
ADCRAVCSLN TSDRCDFVKR NPDCHSEGGY LDYLKGIFCY FPPNLLPLAI
110 120 130 140 150
TLYVFWLLYL FLILGVTAAK FFCPNLSAIS TSLKLSHNVA GVTFLAFGNG
160 170 180 190 200
APDIFSALVA FSDPRTAGLA IGALFGAGVL VTTVVAGGIT ILRPFMAASR
210 220 230 240 250
PFLRDITFYM VAVFLTFTAL YLGRITLVWA LGYLGLYVFY VVTVIICTWV
260 270 280 290 300
YQRQRSRSLV HSISETPELL TDSEEDQMSS NTNSYDYGEE YRPLLLGEET
310 320 330 340 350
TGQILLQALN PLDYRKWRTQ SISCKLLKVA KLPVEFLLLL TVPVVDPDKD
360 370 380 390 400
DRNWKRPLNC LQLVISPLVL VLTLQSGVYG IYEIGGLLPV WAVVVIVGTA
410 420 430 440 450
LASVTFFATS NSEPPRLHWL FAFLGFLTSA LWINAAATEV VNILRSLGVV
460 470 480 490 500
FRLSNTVLGL TLLAWGNSIG DAFSDFTLAR QGYPRMAFSA CFGGIIFNIL
510 520 530 540 550
VGVGLGCLLQ IVRSHASEVK LEPDGLLVWV LASALGLSLV FSLVSVPLQC
560 570 580
FQLSKAYGLC LLLFYICFIV VVLLTEFGVI HLKAD
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | BC079350 mRNA Translation: AAH79350.1 |
RefSeqi | NP_001017488.1, NM_001017488.1 |
Genome annotation databases
Ensembli | ENSRNOT00000038736; ENSRNOP00000034026; ENSRNOG00000001383 |
GeneIDi | 498185 |
KEGGi | rno:498185 |
UCSCi | RGD:1565818, rat |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | BC079350 mRNA Translation: AAH79350.1 |
RefSeqi | NP_001017488.1, NM_001017488.1 |
3D structure databases
ModBasei | Search... |
SWISS-MODEL-Workspacei | Submit a new modelling project... |
Protein-protein interaction databases
STRINGi | 10116.ENSRNOP00000034026 |
PTM databases
GlyGeni | Q6AXS0, 1 site |
Proteomic databases
PaxDbi | Q6AXS0 |
PRIDEi | Q6AXS0 |
Genome annotation databases
Ensembli | ENSRNOT00000038736; ENSRNOP00000034026; ENSRNOG00000001383 |
GeneIDi | 498185 |
KEGGi | rno:498185 |
UCSCi | RGD:1565818, rat |
Organism-specific databases
CTDi | 80024 |
RGDi | 1565818, Slc8b1 |
Phylogenomic databases
eggNOGi | KOG2399, Eukaryota |
GeneTreei | ENSGT00940000157433 |
HOGENOMi | CLU_004979_3_2_1 |
InParanoidi | Q6AXS0 |
OMAi | WIMNIAN |
OrthoDBi | 478735at2759 |
PhylomeDBi | Q6AXS0 |
TreeFami | TF323444 |
Enzyme and pathway databases
Reactomei | R-RNO-425561, Sodium/Calcium exchangers R-RNO-8949215, Mitochondrial calcium ion transport |
Miscellaneous databases
PROi | PR:Q6AXS0 |
Gene expression databases
Bgeei | ENSRNOG00000001383, Expressed in spleen and 21 other tissues |
Genevisiblei | Q6AXS0, RN |
Family and domain databases
InterProi | View protein in InterPro IPR004837, NaCa_Exmemb |
Pfami | View protein in Pfam PF01699, Na_Ca_ex, 2 hits |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | NCLX_RAT | |
Accessioni | Q6AXS0Primary (citable) accession number: Q6AXS0 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | January 10, 2006 |
Last sequence update: | September 13, 2004 | |
Last modified: | December 2, 2020 | |
This is version 103 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Chordata Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- SIMILARITY comments
Index of protein domains and families