Gene description for SI
Gene name sucrase-isomaltase (alpha-glucosidase)
Gene symbol SI
Other names/aliases -
Species Homo sapiens
 Database cross references - SI
ExoCarta ExoCarta_6476
Entrez Gene 6476
HGNC 10856
MIM 609845
UniProt P14410  
 SI identified in exosomes derived from the following tissue/cell type
Colorectal cancer cells 25890246    
Colorectal cancer cells 25890246    
Colorectal cancer cells 25890246    
Colorectal cancer cells 25890246    
Urine 22418980    
Urine 22418980    
 Gene ontology annotations for SI
Molecular Function
    carbohydrate binding GO:0030246 IEA
    alpha-1,4-glucosidase activity GO:0004558 EXP
    oligo-1,6-glucosidase activity GO:0004574 IEA
    sucrose alpha-glucosidase activity GO:0004575 TAS
Biological Process
    small molecule metabolic process GO:0044281 TAS
    polysaccharide digestion GO:0044245 TAS
    carbohydrate metabolic process GO:0005975 TAS
Subcellular Localization
    plasma membrane GO:0005886 TAS
    extracellular exosome GO:0070062 IDA
    apical plasma membrane GO:0016324 IEA
    Golgi apparatus GO:0005794 TAS
    integral component of membrane GO:0016021 IEA
    brush border GO:0005903 TAS
 Experiment description of studies that identified SI in exosomes
1
Experiment ID 282
ISEV standards
✔
CEM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81|EpCAM
EV Membrane markers
✘ EV Negative markers
✔
DLS
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25890246    
Organism Homo sapiens
Experiment description Highly-purified exosomes and shed microvesicles isolated from the human colon cancer cell line LIM1863 by sequential centrifugal ultrafiltration are biochemically and functionally distinct.
Authors Xu R, Greening DW, Rai A, Ji H, Simpson RJ.
Journal name Methods
Publication year 2015
Sample Colorectal cancer cells
Sample name LIM1863 - Ultracentrifugation - Rep 1
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Centrifugal concentration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
2
Experiment ID 283
ISEV standards
✔
CEM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81|EpCAM
EV Membrane markers
✘ EV Negative markers
✔
DLS
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25890246    
Organism Homo sapiens
Experiment description Highly-purified exosomes and shed microvesicles isolated from the human colon cancer cell line LIM1863 by sequential centrifugal ultrafiltration are biochemically and functionally distinct.
Authors Xu R, Greening DW, Rai A, Ji H, Simpson RJ.
Journal name Methods
Publication year 2015
Sample Colorectal cancer cells
Sample name LIM1863 - Ultracentrifugation - Rep 2
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Centrifugal concentration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
3
Experiment ID 285
ISEV standards
✔
CEM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81|EpCAM
EV Membrane markers
✘ EV Negative markers
✔
DLS
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25890246    
Organism Homo sapiens
Experiment description Highly-purified exosomes and shed microvesicles isolated from the human colon cancer cell line LIM1863 by sequential centrifugal ultrafiltration are biochemically and functionally distinct.
Authors Xu R, Greening DW, Rai A, Ji H, Simpson RJ.
Journal name Methods
Publication year 2015
Sample Colorectal cancer cells
Sample name LIM1863 - Sequential centrifugal ultrafiltration - Rep 1
Isolation/purification methods Differential centrifugation
Filtration
Sequential centrifugal ultrafiltration
Centrifugal concentration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
4
Experiment ID 286
ISEV standards
✔
CEM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81|EpCAM
EV Membrane markers
✘ EV Negative markers
✔
DLS
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25890246    
Organism Homo sapiens
Experiment description Highly-purified exosomes and shed microvesicles isolated from the human colon cancer cell line LIM1863 by sequential centrifugal ultrafiltration are biochemically and functionally distinct.
Authors Xu R, Greening DW, Rai A, Ji H, Simpson RJ.
Journal name Methods
Publication year 2015
Sample Colorectal cancer cells
Sample name LIM1863 - Sequential centrifugal ultrafiltration - Rep 2
Isolation/purification methods Differential centrifugation
Filtration
Sequential centrifugal ultrafiltration
Centrifugal concentration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
5
Experiment ID 196
ISEV standards
✔
EM
EV Biophysical techniques
✔
Alix|TSG101|HSP70
EV Cytosolic markers
✔
CD9
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 22418980    
Organism Homo sapiens
Experiment description A multiplex quantitative proteomics strategy for protein biomarker studies in urinary exosomes.
Authors Raj DA, Fiume I, Capasso G, Pocsfalvi G.
Journal name Kidney Int
Publication year 2012
Sample Urine
Sample name Urine - Normal high density
Isolation/purification methods Differential centrifugation
Sucrose cushion
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
6
Experiment ID 197
ISEV standards
✔
EM
EV Biophysical techniques
✔
Alix|TSG101|HSP70
EV Cytosolic markers
✔
CD9
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 22418980    
Organism Homo sapiens
Experiment description A multiplex quantitative proteomics strategy for protein biomarker studies in urinary exosomes.
Authors Raj DA, Fiume I, Capasso G, Pocsfalvi G.
Journal name Kidney Int
Publication year 2012
Sample Urine
Sample name Urine - Normal low density
Isolation/purification methods Differential centrifugation
Sucrose cushion
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
 Protein-protein interactions for SI
  Protein Interactor ExoCarta ID Identification method PubMed Species
No interactions are found.
 Pathways in which SI is involved
PathwayEvidenceSource
Digestion of dietary carbohydrate TAS Reactome
Intestinal saccharidase deficiencies TAS Reactome





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