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General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.
Gene namei
Official gene symbol, which is typically a short form of the gene name, according to HGNC.
Assigned HPA protein class(es) for the encoded protein(s).
CD markers Disease related genes FDA approved drug targets Human disease related genes Plasma proteins Transporters
Predicted locationi
All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.
Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.
Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).
The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.
Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.
Chromosome
1
Cytoband
q23.3
Chromosome location (bp)
161541759 - 161550968
Number of transcriptsi
Number of protein-coding transcripts from the gene as defined by Ensembl.
Useful information about the protein provided by UniProt.
Receptor for the invariable Fc fragment of immunoglobulin gamma (IgG). Optimally activated upon binding of clustered antigen-IgG complexes displayed on cell surfaces, triggers lysis of antibody-coated cells, a process known as antibody-dependent cellular cytotoxicity (ADCC). Does not bind free monomeric IgG, thus avoiding inappropriate effector cell activation in the absence of antigenic trigger 1,2,3,4,5,6,7,8,9. Mediates IgG effector functions on natural killer (NK) cells. Binds antigen-IgG complexes generated upon infection and triggers NK cell-dependent cytokine production and degranulation to limit viral load and propagation. Involved in the generation of memory-like adaptive NK cells capable to produce high amounts of IFNG and to efficiently eliminate virus-infected cells via ADCC 10,11. Regulates NK cell survival and proliferation, in particular by preventing NK cell progenitor apoptosis 12,13. Fc-binding subunit that associates with CD247 and/or FCER1G adapters to form functional signaling complexes. Following the engagement of antigen-IgG complexes, triggers phosphorylation of immunoreceptor tyrosine-based activation motif (ITAM)-containing adapters with subsequent activation of phosphatidylinositol 3-kinase signaling and sustained elevation of intracellular calcium that ultimately drive NK cell activation. The ITAM-dependent signaling coupled to receptor phosphorylation by PKC mediates robust intracellular calcium flux that leads to production of pro-inflammatory cytokines, whereas in the absence of receptor phosphorylation it mainly activates phosphatidylinositol 3-kinase signaling leading to cell degranulation 14,15,16. Costimulates NK cells and trigger lysis of target cells independently of IgG binding 17,18. Mediates the antitumor activities of therapeutic antibodies. Upon ligation on monocytes triggers TNFA-dependent ADCC of IgG-coated tumor cells 19. Mediates enhanced ADCC in response to afucosylated IgGs 20....show less
Molecular function (UniProt)i
Keywords assigned by UniProt to proteins due to their particular molecular function.
IgG-binding protein, Receptor
Biological process (UniProt)i
Keywords assigned by UniProt to proteins because they are involved in a particular biological process.
Immunity
Gene summary (Entrez)i
Useful information about the gene from Entrez
This gene encodes a receptor for the Fc portion of immunoglobulin G, and it is involved in the removal of antigen-antibody complexes from the circulation, as well as other responses, including antibody dependent cellular mediated cytotoxicity and antibody dependent enhancement of virus infections. This gene (FCGR3A) is highly similar to another nearby gene (FCGR3B) located on chromosome 1. The receptor encoded by this gene is expressed on natural killer (NK) cells as an integral membrane glycoprotein anchored through a transmembrane peptide, whereas FCGR3B is expressed on polymorphonuclear neutrophils (PMN) where the receptor is anchored through a phosphatidylinositol (PI) linkage. Mutations in this gene are associated with immunodeficiency 20, and have been linked to susceptibility to recurrent viral infections, susceptibility to systemic lupus erythematosus, and alloimmune neonatal neutropenia. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2020]...show less
PROTEIN INFORMATIONi
The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.
The ENSP identifier links to the Ensembl website protein summary, while the ENST identifier links to the Ensembl website transcript summary for the selected splice variant. The data in the UniProt column can be expanded to show links to all matching UniProt identifiers for this protein.
The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.
The Gene Ontology terms assigned to this protein are listed if expanding the Gene ontology column. The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide (according to a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius) and the number of predicted transmembrane region(s) (according to MDM) are also reported.
P08637 [Direct mapping] Low affinity immunoglobulin gamma Fc region receptor III-A
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CD markers Transporters Accessory Factors Involved in Transport Predicted membrane proteins Prediction method-based Membrane proteins predicted by MDM MEMSAT-SVM predicted membrane proteins Phobius predicted membrane proteins SCAMPI predicted membrane proteins SPOCTOPUS predicted membrane proteins THUMBUP predicted membrane proteins TMHMM predicted membrane proteins # TM segments-based 1TM proteins predicted by MDM Plasma proteins Disease related genes FDA approved drug targets Biotech drugs Human disease related genes Immune system diseases Allergies and autoimmune diseases Primary immunodeficiency Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
P08637 [Direct mapping] Low affinity immunoglobulin gamma Fc region receptor III-A
Show all
CD markers Transporters Accessory Factors Involved in Transport Predicted membrane proteins Prediction method-based Membrane proteins predicted by MDM MEMSAT-SVM predicted membrane proteins Phobius predicted membrane proteins SCAMPI predicted membrane proteins SPOCTOPUS predicted membrane proteins THUMBUP predicted membrane proteins TMHMM predicted membrane proteins # TM segments-based 1TM proteins predicted by MDM Plasma proteins Disease related genes FDA approved drug targets Biotech drugs Human disease related genes Immune system diseases Allergies and autoimmune diseases Primary immunodeficiency Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
C9JC71 [Direct mapping] Low affinity immunoglobulin gamma Fc region receptor III-A
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Predicted secreted proteins Secreted proteins predicted by MDSEC SignalP predicted secreted proteins Phobius predicted secreted proteins SPOCTOPUS predicted secreted proteins Human disease related genes Immune system diseases Allergies and autoimmune diseases Primary immunodeficiency Protein evidence (Ezkurdia et al 2014)
P08637 [Direct mapping] Low affinity immunoglobulin gamma Fc region receptor III-A
Show all
CD markers Transporters Accessory Factors Involved in Transport Predicted membrane proteins Prediction method-based Membrane proteins predicted by MDM MEMSAT-SVM predicted membrane proteins Phobius predicted membrane proteins SCAMPI predicted membrane proteins SPOCTOPUS predicted membrane proteins THUMBUP predicted membrane proteins TMHMM predicted membrane proteins # TM segments-based 1TM proteins predicted by MDM Plasma proteins Disease related genes FDA approved drug targets Biotech drugs Human disease related genes Immune system diseases Allergies and autoimmune diseases Primary immunodeficiency Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Ezkurdia et al 2014)
Predicted secreted proteins Secreted proteins predicted by MDSEC SignalP predicted secreted proteins Phobius predicted secreted proteins SPOCTOPUS predicted secreted proteins Human disease related genes Immune system diseases Allergies and autoimmune diseases Primary immunodeficiency Protein evidence (Ezkurdia et al 2014)
The Human Protein Atlas project is funded
