Gene description for DEFA1B
Gene name defensin, alpha 1B
Gene symbol DEFA1B
Other names/aliases HNP-1
HP-1
HP1
Species Homo sapiens
 Database cross references - DEFA1B
ExoCarta ExoCarta_728358
Vesiclepedia VP_728358
Entrez Gene 728358
HGNC 33596
UniProt P59665  
 DEFA1B identified in sEVs derived from the following tissue/cell type
Saliva 19199708    
Urine 22418980    
Urine 22418980    
 Gene ontology annotations for DEFA1B
Molecular Function
    protein binding GO:0005515 IPI
    pore-forming activity GO:0140911 IDA
Biological Process
    innate immune response in mucosa GO:0002227 IBA
    innate immune response in mucosa GO:0002227 IDA
    chemotaxis GO:0006935 TAS
    immune response GO:0006955 TAS
    T cell chemotaxis GO:0010818 IDA
    antibacterial humoral response GO:0019731 IBA
    antibacterial humoral response GO:0019731 IDA
    estrogen receptor signaling pathway GO:0030520 IDA
    killing of cells of another organism GO:0031640 IDA
    defense response to protozoan GO:0042832 IMP
    defense response to Gram-negative bacterium GO:0050829 IBA
    defense response to Gram-positive bacterium GO:0050830 IBA
    defense response to Gram-positive bacterium GO:0050830 IDA
    defense response to fungus GO:0050832 IEA
    defense response to virus GO:0051607 IEA
    disruption of plasma membrane integrity in another organism GO:0051673 IBA
    killing by host of symbiont cells GO:0051873 IDA
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IBA
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IC
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IDA
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IMP
    cellular response to lipopolysaccharide GO:0071222 IBA
Subcellular Localization
    extracellular region GO:0005576 TAS
    extracellular space GO:0005615 HDA
    extracellular space GO:0005615 IBA
    extracellular space GO:0005615 IDA
    Golgi lumen GO:0005796 TAS
    azurophil granule lumen GO:0035578 TAS
    collagen-containing extracellular matrix GO:0062023 HDA
    collagen-containing extracellular matrix GO:0062023 HDA
    extracellular exosome GO:0070062 HDA
 Experiment description of studies that identified DEFA1B in sEVs
1
Experiment ID 66
MISEV standards
IEM
Biophysical techniques
TSG101|Alix|CD63|CD81
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 19199708    
Organism Homo sapiens
Experiment description Proteomic analysis of human parotid gland exosomes by multidimensional protein identification technology (MudPIT).
Authors "Gonzalez-Begne M, Lu B, Han X, Hagen FK, Hand AR, Melvin JE, Yates JR"
Journal name JPR
Publication year 2009
Sample Saliva
Sample name Saliva
Isolation/purification methods Differential centrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [LTQ]
Western blotting
Immunoelectron Microscopy
2
Experiment ID 196
MISEV standards
EM
Biophysical techniques
Alix|TSG101|HSP70|CD9
Enriched markers
Negative markers
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
3
Experiment ID 197
MISEV standards
EM
Biophysical techniques
Alix|TSG101|HSP70|CD9
Enriched markers
Negative markers
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 DEFA1B
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 UBQLN2 29978
Two-hybrid Homo sapiens
2 SNW1 22938
Affinity Capture-MS Homo sapiens
3 ITGA5 3678
Affinity Capture-MS Homo sapiens
4 PLB1  
Affinity Capture-MS Homo sapiens
5 ERO1L 30001
Affinity Capture-MS Homo sapiens
6 PPP2R2B 5521
Affinity Capture-MS Homo sapiens
7 CCR1  
Affinity Capture-MS Homo sapiens
8 KLK10 5655
Affinity Capture-MS Homo sapiens
9 DEFA1 1667
Affinity Capture-MS Homo sapiens
10 FBXO4 26272
Affinity Capture-MS Homo sapiens
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