Gene description for ATP1A2
Gene name ATPase, Na+/K+ transporting, alpha 2 polypeptide
Gene symbol ATP1A2
Other names/aliases FHM2
MHP2
Species Homo sapiens
 Database cross references - ATP1A2
ExoCarta ExoCarta_477
Entrez Gene 477
HGNC 800
MIM 182340
UniProt P50993  
 ATP1A2 identified in exosomes derived from the following tissue/cell type
Colorectal cancer cells 17956143    
Colorectal cancer cells 19837982    
Colorectal cancer cells 23161513    
Colorectal cancer cells 23161513    
Colorectal cancer cells 23161513    
Neuroblastoma cells 25944692    
Prostate cancer cells 25844599    
 Gene ontology annotations for ATP1A2
Molecular Function
    metal ion binding GO:0046872 IEA
    ATP binding GO:0005524 IEA
    steroid hormone binding GO:1990239 IDA
    chaperone binding GO:0051087 IPI
    sodium:potassium-exchanging ATPase activity GO:0005391 IMP
Biological Process
    neurotransmitter uptake GO:0001504 IEA
    metabolic process GO:0008152 IEA
    regulation of respiratory gaseous exchange by neurological system process GO:0002087 IEA
    negative regulation of calcium:sodium antiporter activity GO:1903280 ISS
    sodium ion export from cell GO:0036376 IDA
    ion transmembrane transport GO:0034220 TAS
    transmembrane transport GO:0055085 TAS
    locomotion GO:0040011 IEA
    regulation of vasoconstriction GO:0019229 IEA
    cellular response to steroid hormone stimulus GO:0071383 IDA
    cell communication by electrical coupling involved in cardiac conduction GO:0086064 TAS
    response to nicotine GO:0035094 IEA
    regulation of cardiac muscle cell contraction GO:0086004 IEA
    regulation of smooth muscle contraction GO:0006940 IEA
    cellular response to mechanical stimulus GO:0071260 IEA
    response to glycoside GO:1903416 ISS
    cellular potassium ion homeostasis GO:0030007 IDA
    ATP hydrolysis coupled proton transport GO:0015991 IEA
    negative regulation of cytosolic calcium ion concentration GO:0051481 IEA
    negative regulation of calcium ion transmembrane transport GO:1903170 ISS
    membrane depolarization during cardiac muscle cell action potential GO:0086012 TAS
    regulation of blood pressure GO:0008217 IEA
    regulation of striated muscle contraction GO:0006942 NAS
    negative regulation of striated muscle contraction GO:0045988 IEA
    cellular sodium ion homeostasis GO:0006883 IDA
    regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion GO:0010881 TAS
    cardiac muscle contraction GO:0060048 TAS
    regulation of the force of heart contraction GO:0002026 IEA
    potassium ion transport GO:0006813 NAS
    visual learning GO:0008542 IEA
    potassium ion import GO:0010107 IDA
    adult locomotory behavior GO:0008344 IEA
    relaxation of cardiac muscle GO:0055119 TAS
    sodium ion transport GO:0006814 NAS
    negative regulation of heart contraction GO:0045822 IEA
Subcellular Localization
    caveola GO:0005901 IEA
    cytosol GO:0005829 IEA
    synapse GO:0045202 IEA
    endosome GO:0005768 IEA
    cytoplasm GO:0005737 IDA
    T-tubule GO:0030315 IEA
    dendritic spine GO:0043197 IEA
    plasma membrane GO:0005886 TAS
    sodium:potassium-exchanging ATPase complex GO:0005890 IDA
    extracellular vesicle GO:1903561 IDA
 Experiment description of studies that identified ATP1A2 in exosomes
1
Experiment ID 20
ISEV standards
✔
EM
EV Biophysical techniques
✔
HSP90
EV Cytosolic markers
✔
CD63|CD81|LAMP1
EV Membrane markers
✔
GOLGA2|cytochrome c
EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 17956143    
Organism Homo sapiens
Experiment description Proteomic analysis of microvesicles derived from human colorectal cancer cells.
Authors Choi DS, Lee JM, Park GW, Lim HW, Bang JY, Kim YK, Kwon KH, Kwon HJ, Kim KP, Gho YS
Journal name JPR
Publication year 2007
Sample Colorectal cancer cells
Sample name HT29
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Diafiltration
Flotation density 1.16 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [LTQ]
Western blotting
2
Experiment ID 21
ISEV standards
✔
EM|IEM
EV Biophysical techniques
✔
Alix|TSG101|HSP70
EV Cytosolic markers
✔
CD63
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method
Mass spectrometry   
PubMed ID 19837982    
Organism Homo sapiens
Experiment description Proteomic and bioinformatic analysis of immunoaffinity-purified exosomes derived from the human colon tumor cell line LIM1215.
Authors Suresh Mathivanan, Justin W.E. Lim, Bow J. Tauro, Hong Ji, Robert L. Moritz and Richard J. Simpson
Journal name MCP
Publication year 2009
Sample Colorectal cancer cells
Sample name LIM1215
Isolation/purification methods Filtration
Ultracentrifugation
Sucrose density gradient
Flotation density 1.10-1.12 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [Orbitrap]
Western blotting
3
Experiment ID 207
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|HSP70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✔
VDAC
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23161513    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes from mutant KRAS colon cancer cells identifies intercellular transfer of mutant KRAS.
Authors Demory Beckler M, Higginbotham JN, Franklin JL, Ham AJ, Halvey PJ, Imasuen IE, Whitwell C, Li M, Liebler DC, Coffey RJ.
Journal name Mol Cell Proteomics
Publication year 2012
Sample Colorectal cancer cells
Sample name DKO-1
Isolation/purification methods Differential centrifugation
Filtration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
4
Experiment ID 208
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|HSP70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✔
VDAC
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23161513    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes from mutant KRAS colon cancer cells identifies intercellular transfer of mutant KRAS.
Authors Demory Beckler M, Higginbotham JN, Franklin JL, Ham AJ, Halvey PJ, Imasuen IE, Whitwell C, Li M, Liebler DC, Coffey RJ.
Journal name Mol Cell Proteomics
Publication year 2012
Sample Colorectal cancer cells
Sample name Dks-8
Isolation/purification methods Differential centrifugation
Filtration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
5
Experiment ID 209
ISEV standards
✘ EV Biophysical techniques
✔
TSG101|HSP70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✔
VDAC
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23161513    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes from mutant KRAS colon cancer cells identifies intercellular transfer of mutant KRAS.
Authors Demory Beckler M, Higginbotham JN, Franklin JL, Ham AJ, Halvey PJ, Imasuen IE, Whitwell C, Li M, Liebler DC, Coffey RJ.
Journal name Mol Cell Proteomics
Publication year 2012
Sample Colorectal cancer cells
Sample name DLD-1
Isolation/purification methods Differential centrifugation
Filtration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
6
Experiment ID 224
ISEV standards
✔
EM|AFM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81
EV Membrane markers
✔
GOLGA2
EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25944692    
Organism Homo sapiens
Experiment description Proteogenomic analysis reveals exosomes are more oncogenic than ectosomes
Authors Keerthikumar S, Gangoda L, Liem M, Fonseka P, Atukorala I, Ozcitti C, Mechler A, Adda CG, Ang CS, Mathivanan S
Journal name Oncotarget
Publication year 2015
Sample Neuroblastoma cells
Sample name SH-SY5Y
Isolation/purification methods Differential centrifugation
Ultracentrifugation
OptiPrep density gradient
Flotation density 1.10 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
7
Experiment ID 275
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|Alix|RAB5A
EV Cytosolic markers
✔
CD9|CD82|CD63|CD81
EV Membrane markers
✔
AIF
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25844599    
Organism Homo sapiens
Experiment description Molecular profiling of prostate cancer derived exosomes may reveal a predictive signature for response to docetaxel.
Authors Kharaziha P, Chioureas D, Rutishauser D, Baltatzis G, Lennartsson L, Fonseca P, Azimi A, Hultenby K, Zubarev R, Ullen A, Yachnin J, Nilsson S, Panaretakis T.
Journal name Oncotarget
Publication year 2015
Sample Prostate cancer cells
Sample name DU145 - Docetaxel sensitive
Isolation/purification methods Filtration
Ultracentrifugation
Sucrose density gradient
Flotation density 1.12-1.19 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry/Flow cytometry/Western blotting
 Protein-protein interactions for ATP1A2
  Protein Interactor ExoCarta ID Identification method PubMed Species
No interactions are found.
 Pathways in which ATP1A2 is involved
PathwayEvidenceSource
Ion transport by P-type ATPases TAS Reactome





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