Gene description for C1QB
Gene name complement component 1, q subcomponent, B chain
Gene symbol C1QB
Other names/aliases -
Species Homo sapiens
 Database cross references - C1QB
ExoCarta ExoCarta_713
Entrez Gene 713
HGNC 1242
MIM 120570
UniProt P02746  
 C1QB identified in exosomes derived from the following tissue/cell type
Malignant pleural effusions 14975938    
Malignant pleural effusions 14975938    
Plasma 19028452    
Platelets 25332113    
Platelets 25332113    
Platelets 25332113    
 Gene ontology annotations for C1QB
Molecular Function
    protein binding GO:0005515 IPI
    protein homodimerization activity GO:0042803 IEA
Biological Process
    inner ear development GO:0048839 IEA
    complement activation GO:0006956 TAS
    innate immune response GO:0045087 TAS
    complement activation, classical pathway GO:0006958 TAS
Subcellular Localization
    extracellular exosome GO:0070062 IDA
    complement component C1 complex GO:0005602 TAS
    collagen trimer GO:0005581 IEA
    extracellular region GO:0005576 TAS
    blood microparticle GO:0072562 IDA
 Experiment description of studies that identified C1QB in exosomes
1
Experiment ID 52
ISEV standards
✔
EM
EV Biophysical techniques
✔
HSP90
EV Cytosolic markers
✔
MHCII
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 14975938    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes isolated from human malignant pleural effusions.
Authors Bard MP, Hegmans JP, Hemmes A, Luider TM, Willemsen R, Severijnen LA, van Meerbeeck JP, Burgers SA, Hoogsteden HC, Lambrecht BN
Journal name AJRCMB
Publication year 2004
Sample Malignant pleural effusions
Sample name Pleural Fluid - Lung cancer
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [MALDI TOF]
Western blotting
2
Experiment ID 53
ISEV standards
✔
EM
EV Biophysical techniques
✔
HSP90
EV Cytosolic markers
✔
MHCII
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 14975938    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes isolated from human malignant pleural effusions.
Authors Bard MP, Hegmans JP, Hemmes A, Luider TM, Willemsen R, Severijnen LA, van Meerbeeck JP, Burgers SA, Hoogsteden HC, Lambrecht BN
Journal name AJRCMB
Publication year 2004
Sample Malignant pleural effusions
Sample name Pleural Fluid - Mesothelioma
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [MALDI TOF]
Western blotting
3
Experiment ID 44
ISEV standards
✔
IEM
EV Biophysical techniques
✘ EV Cytosolic markers
✘ EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 19028452    
Organism Homo sapiens
Experiment description Proteomic profiling of human plasma exosomes identifies PPARgamma as an exosome-associated protein.
Authors Looze C, Yui D, Leung L, Ingham M, Kaler M, Yao X, Wu WW, Shen RF, Daniels MP, Levine SJ
Journal name BBRC
Publication year 2009
Sample Plasma
Sample name Plasma
Isolation/purification methods Filtration
Size exclusion
Sucrose density gradient
Flotation density 1.15-1.16 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [LTQ]
Western blotting
Immunoelectron Microscopy
4
Experiment ID 231
ISEV standards
✘ EV Biophysical techniques
✔
Alix
EV Cytosolic markers
✔
CD63|CD9
EV Membrane markers
✘ EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25332113    
Organism Homo sapiens
Experiment description Lipidomic and proteomic characterization of platelet extracellular vesicle subfractions from senescent platelets
Authors Pienimaeki-Roemer A, Kuhlmann K, Bottcher A, Konovalova T, Black A, Orso E, Liebisch G, Ahrens M, Eisenacher M, Meyer HE, Schmitz G.
Journal name Transfusion
Publication year 2015
Sample Platelets
Sample name PL-Exs - Rep 1
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Optiprep density gradient
Flotation density 1.12-1.15 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Western blotting
Mass spectrometry
5
Experiment ID 232
ISEV standards
✘ EV Biophysical techniques
✘ EV Cytosolic markers
✘ EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25332113    
Organism Homo sapiens
Experiment description Lipidomic and proteomic characterization of platelet extracellular vesicle subfractions from senescent platelets
Authors Pienimaeki-Roemer A, Kuhlmann K, Bottcher A, Konovalova T, Black A, Orso E, Liebisch G, Ahrens M, Eisenacher M, Meyer HE, Schmitz G.
Journal name Transfusion
Publication year 2015
Sample Platelets
Sample name PL-Exs - Rep 2
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Optiprep density gradient
Flotation density 1.12-1.15 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
6
Experiment ID 233
ISEV standards
✘ EV Biophysical techniques
✘ EV Cytosolic markers
✘ EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25332113    
Organism Homo sapiens
Experiment description Lipidomic and proteomic characterization of platelet extracellular vesicle subfractions from senescent platelets
Authors Pienimaeki-Roemer A, Kuhlmann K, Bottcher A, Konovalova T, Black A, Orso E, Liebisch G, Ahrens M, Eisenacher M, Meyer HE, Schmitz G.
Journal name Transfusion
Publication year 2015
Sample Platelets
Sample name PL-Exs - Rep 3
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Optiprep density gradient
Flotation density 1.12-1.15 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
 Protein-protein interactions for C1QB
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 C1QC 714
Affinity Capture-MS Homo sapiens
2 PTX3 5806
Invitro Homo sapiens
3 C1R 715
Invivo Homo sapiens
Affinity Capture-MS Homo sapiens
4 HRG 3273
Invivo Homo sapiens
5 DEFA1 1667
Invitro Homo sapiens
Affinity Capture-MS Homo sapiens
View the network image/svg+xml
 Pathways in which C1QB is involved
PathwayEvidenceSource
Classical antibody-mediated complement activation TAS Reactome
Initial triggering of complement TAS Reactome





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