Gene description for Psma2
Gene name proteasome (prosome, macropain) subunit, alpha type 2
Gene symbol Psma2
Other names/aliases Lmpc3
Species Mus musculus
 Database cross references - Psma2
ExoCarta ExoCarta_19166
Entrez Gene 19166
UniProt P49722  
 Psma2 identified in exosomes derived from the following tissue/cell type
Brain cancer cells 19109410    
Fibroblasts 23260141    
Mov neuroglial cells 15210972    
 Gene ontology annotations for Psma2
Molecular Function
    threonine-type endopeptidase activity GO:0004298 IEA
    peptidase activity GO:0008233 IEA
    hydrolase activity GO:0016787 IEA
    endopeptidase activity GO:0004175 IBA
Biological Process
    proteasome-mediated ubiquitin-dependent protein catabolic process GO:0043161 IBA
    proteolysis involved in cellular protein catabolic process GO:0051603 IEA
    proteolysis GO:0006508 IEA
    proteasomal ubiquitin-independent protein catabolic process GO:0010499 IBA
    ubiquitin-dependent protein catabolic process GO:0006511 IEA
Subcellular Localization
    nucleus GO:0005634 ISO
    cytoplasm GO:0005737 IBA
    cytoplasmic mRNA processing body GO:0000932 IDA
    proteasome complex GO:0000502 ISO
    proteasome core complex GO:0005839 IDA
    extracellular exosome GO:0070062 ISO
    proteasome core complex, alpha-subunit complex GO:0019773 IEA
 Experiment description of studies that identified Psma2 in exosomes
1
Experiment ID 26
ISEV standards
✔
EM
EV Biophysical techniques
✔
Alix|GAPDH|HSP70
EV Cytosolic markers
✔
CD9
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 19109410    
Organism Mus musculus
Experiment description Proteomic and immunologic analyses of brain tumor exosomes.
Authors Graner MW, Alzate O, Dechkovskaia AM, Keene JD, Sampson JH, Mitchell DA, Bigner DD
Journal name FASEB
Publication year 2008
Sample Brain cancer cells
Sample name SMA560vIII
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density 1.13-1.15 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [MALDI TOF/TOF]
Western blotting
2
Experiment ID 210
ISEV standards
✔
EM
EV Biophysical techniques
✘ EV Cytosolic markers
✔
CD81|FLOT1
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23260141    
Organism Mus musculus
Experiment description Exosomes Mediate Stromal Mobilization of Autocrine Wnt-PCP Signaling in Breast Cancer Cell Migration.
Authors Luga V, Zhang L, Viloria-Petit AM, Ogunjimi AA, Inanlou MR, Chiu E, Buchanan M, Hosein AN, Basik M, Wrana JL.
Journal name Cell
Publication year 2012
Sample Fibroblasts
Sample name Normal-Fibroblasts (L cells)
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
3
Experiment ID 39
ISEV standards
✔
IEM
EV Biophysical techniques
✔
TSG101|HSC70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 15210972    
Organism Mus musculus
Experiment description Cells release prions in association with exosomes.
Authors Fevrier B, Vilette D, Archer F, Loew D, Faigle W, Vidal M, Laude H, Raposo G
Journal name PNAS
Publication year 2004
Sample Mov neuroglial cells
Sample name Mov neuroglial cell
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density 1.14 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [QSTAR]
Western blotting
Immunoelectron Microscopy
 Protein-protein interactions for Psma2
  Protein Interactor ExoCarta ID Identification method PubMed Species
No interactions are found.
 Pathways in which Psma2 is involved
PathwayEvidenceSource
Activation of NF-kappaB in B cells IEA Reactome
Antigen processing: Ubiquitination & Proteasome degradation IEA Reactome
APC/C:Cdc20 mediated degradation of Securin IEA Reactome
APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 IEA Reactome
Asymmetric localization of PCP proteins IEA Reactome
AUF1 (hnRNP D0) destabilizes mRNA IEA Reactome
Autodegradation of Cdh1 by Cdh1:APC/C IEA Reactome
Autodegradation of the E3 ubiquitin ligase COP1 IEA Reactome
Cdc20:Phospho-APC/C mediated degradation of Cyclin A IEA Reactome
CDK-mediated phosphorylation and removal of Cdc6 IEA Reactome
CDK-mediated phosphorylation and removal of Cdc6 IEA Reactome
CDT1 association with the CDC6:ORC:origin complex IEA Reactome
CLEC7A (Dectin-1) signaling IEA Reactome
Cross-presentation of soluble exogenous antigens (endosomes) IEA Reactome
Dectin-1 mediated noncanonical NF-kB signaling IEA Reactome
degradation of AXIN IEA Reactome
Degradation of beta-catenin by the destruction complex IEA Reactome
degradation of DVL IEA Reactome
Degradation of GLI1 by the proteasome IEA Reactome
Degradation of GLI2 by the proteasome IEA Reactome
ER-Phagosome pathway IEA Reactome
ER-Phagosome pathway IEA Reactome
GLI3 is processed to GLI3R by the proteasome IEA Reactome
Hedgehog 'on' state IEA Reactome
Hedgehog ligand biogenesis IEA Reactome
Orc1 removal from chromatin IEA Reactome
Orc1 removal from chromatin IEA Reactome
Regulation of activated PAK-2p34 by proteasome mediated degradation IEA Reactome
Regulation of ornithine decarboxylase (ODC) IEA Reactome
SCF(Skp2)-mediated degradation of p27/p21 IEA Reactome
SCF(Skp2)-mediated degradation of p27/p21 IEA Reactome
SCF-beta-TrCP mediated degradation of Emi1 IEA Reactome
Separation of Sister Chromatids IEA Reactome
Ubiquitin Mediated Degradation of Phosphorylated Cdc25A IEA Reactome
Ubiquitin-dependent degradation of Cyclin D1 IEA Reactome





Perform bioinformatics analysis of your extracellular vesicle data set using FunRich, a open access standalone tool. NEW UPDATED VERSION OF FunRich available for download (12/09/2016) from here