The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Immunoglobulins
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 1422: T-cell surface glycoprotein CD3 epsilon chain

Please note: GO annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

There are 11 GO terms relating to "molecular function"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Protein binding GO:0005515
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
3 P07766 (/IPI) P22646 (/IPI) P22646 (/IPI)
SH3 domain binding GO:0017124
Interacting selectively and non-covalently with a SH3 domain (Src homology 3) of a protein, small protein modules containing approximately 50 amino acid residues found in a great variety of intracellular or membrane-associated proteins.
2 P22646 (/ISO) P22646 (/ISO)
Protein homodimerization activity GO:0042803
Interacting selectively and non-covalently with an identical protein to form a homodimer.
2 P22646 (/ISO) P22646 (/ISO)
Protein heterodimerization activity GO:0046982
Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
2 P22646 (/ISO) P22646 (/ISO)
Transmembrane signaling receptor activity GO:0004888
Combining with an extracellular or intracellular signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity or state as part of signal transduction.
1 P07766 (/NAS)
SH3 domain binding GO:0017124
Interacting selectively and non-covalently with a SH3 domain (Src homology 3) of a protein, small protein modules containing approximately 50 amino acid residues found in a great variety of intracellular or membrane-associated proteins.
1 P07766 (/IPI)
Protein kinase binding GO:0019901
Interacting selectively and non-covalently with a protein kinase, any enzyme that catalyzes the transfer of a phosphate group, usually from ATP, to a protein substrate.
1 P07766 (/NAS)
Receptor signaling complex adaptor activity GO:0030159
Functions to provide a physical support for the assembly of a multiprotein receptor signaling complex.
1 P07766 (/NAS)
T cell receptor binding GO:0042608
Interacting selectively and non-covalently with a T cell receptor, the antigen-recognizing receptor on the surface of T cells.
1 P07766 (/NAS)
Protein homodimerization activity GO:0042803
Interacting selectively and non-covalently with an identical protein to form a homodimer.
1 P07766 (/IMP)
Protein heterodimerization activity GO:0046982
Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
1 P07766 (/IPI)

There are 42 GO terms relating to "biological process"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Positive regulation of T cell proliferation GO:0042102
Any process that activates or increases the rate or extent of T cell proliferation.
4 A0A0G2K986 (/IDA) D4A5M2 (/IDA) P22646 (/IDA) P22646 (/IDA)
Positive regulation of cell-matrix adhesion GO:0001954
Any process that activates or increases the rate or extent of cell adhesion to an extracellular matrix.
2 P22646 (/IGI) P22646 (/IGI)
Positive regulation of T cell anergy GO:0002669
Any process that activates or increases the frequency, rate, or extent of T cell anergy.
2 P22646 (/IDA) P22646 (/IDA)
Cell surface receptor signaling pathway GO:0007166
A series of molecular signals initiated by activation of a receptor on the surface of a cell. The pathway begins with binding of an extracellular ligand to a cell surface receptor, or for receptors that signal in the absence of a ligand, by ligand-withdrawal or the activity of a constitutively active receptor. The pathway ends with regulation of a downstream cellular process, e.g. transcription.
2 P22646 (/IDA) P22646 (/IDA)
Response to nutrient GO:0007584
Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a nutrient stimulus.
2 A0A0G2K986 (/IDA) D4A5M2 (/IDA)
Response to nutrient GO:0007584
Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a nutrient stimulus.
2 P22646 (/ISO) P22646 (/ISO)
Positive regulation of gene expression GO:0010628
Any process that increases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
2 P22646 (/ISO) P22646 (/ISO)
Negative regulation of gene expression GO:0010629
Any process that decreases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
2 P22646 (/ISO) P22646 (/ISO)
Dendrite development GO:0016358
The process whose specific outcome is the progression of the dendrite over time, from its formation to the mature structure.
2 P22646 (/IMP) P22646 (/IMP)
Cerebellum development GO:0021549
The process whose specific outcome is the progression of the cerebellum over time, from its formation to the mature structure. The cerebellum is the portion of the brain in the back of the head between the cerebrum and the pons. In mice, the cerebellum controls balance for walking and standing, modulates the force and range of movement and is involved in the learning of motor skills.
2 P22646 (/IMP) P22646 (/IMP)
T cell costimulation GO:0031295
The process of providing, via surface-bound receptor-ligand pairs, a second, antigen-independent, signal in addition to that provided by the T cell receptor to augment T cell activation.
2 P22646 (/IGI) P22646 (/IGI)
Positive regulation of interferon-gamma production GO:0032729
Any process that activates or increases the frequency, rate, or extent of interferon-gamma production. Interferon-gamma is also known as type II interferon.
2 P22646 (/IDA) P22646 (/IDA)
Positive regulation of interleukin-4 production GO:0032753
Any process that activates or increases the frequency, rate, or extent of interleukin-4 production.
2 P22646 (/IDA) P22646 (/IDA)
T cell differentiation in thymus GO:0033077
The process in which a precursor cell type acquires the specialized features of a T cell via a differentiation pathway dependent upon transit through the thymus.
2 A0A0G2K986 (/IEP) D4A5M2 (/IEP)
Positive regulation of cell-cell adhesion mediated by integrin GO:0033634
Any process that activates or increases the frequency, rate, or extent of cell-cell adhesion mediated by integrin.
2 P22646 (/IGI) P22646 (/IGI)
Positive regulation of T cell proliferation GO:0042102
Any process that activates or increases the rate or extent of T cell proliferation.
2 P22646 (/ISO) P22646 (/ISO)
Negative thymic T cell selection GO:0045060
The process of elimination of immature T cells in the thymus which react strongly with self-antigens.
2 P22646 (/IDA) P22646 (/IDA)
Positive regulation of interleukin-2 biosynthetic process GO:0045086
Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of interleukin-2.
2 P22646 (/IDA) P22646 (/IDA)
Negative regulation of smoothened signaling pathway GO:0045879
Any process that stops, prevents, or reduces the frequency, rate or extent of smoothened signaling.
2 P22646 (/IDA) P22646 (/IDA)
Positive regulation of alpha-beta T cell proliferation GO:0046641
Any process that activates or increases the frequency, rate or extent of alpha-beta T cell proliferation.
2 P22646 (/IDA) P22646 (/IDA)
Lymphocyte activation GO:0046649
A change in morphology and behavior of a lymphocyte resulting from exposure to a specific antigen, mitogen, cytokine, chemokine, cellular ligand, or soluble factor.
2 P22646 (/IMP) P22646 (/IMP)
Positive regulation of peptidyl-tyrosine phosphorylation GO:0050731
Any process that activates or increases the frequency, rate or extent of the phosphorylation of peptidyl-tyrosine.
2 P22646 (/IDA) P22646 (/IDA)
Positive regulation of calcium-mediated signaling GO:0050850
Any process that activates or increases the frequency, rate or extent of calcium-mediated signaling.
2 P22646 (/IDA) P22646 (/IDA)
T cell receptor signaling pathway GO:0050852
A series of molecular signals initiated by the cross-linking of an antigen receptor on a T cell.
2 P22646 (/IDA) P22646 (/IDA)
Positive regulation of T cell activation GO:0050870
Any process that activates or increases the frequency, rate or extent of T cell activation.
2 P22646 (/IDA) P22646 (/IDA)
Protein homooligomerization GO:0051260
The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of identical component monomers. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
2 P22646 (/ISO) P22646 (/ISO)
Apoptotic signaling pathway GO:0097190
A series of molecular signals which triggers the apoptotic death of a cell. The pathway starts with reception of a signal, and ends when the execution phase of apoptosis is triggered.
2 P22646 (/IDA) P22646 (/IDA)
Positive regulation of cell-matrix adhesion GO:0001954
Any process that activates or increases the rate or extent of cell adhesion to an extracellular matrix.
1 P07766 (/ISS)
Cell surface receptor signaling pathway GO:0007166
A series of molecular signals initiated by activation of a receptor on the surface of a cell. The pathway begins with binding of an extracellular ligand to a cell surface receptor, or for receptors that signal in the absence of a ligand, by ligand-withdrawal or the activity of a constitutively active receptor. The pathway ends with regulation of a downstream cellular process, e.g. transcription.
1 P07766 (/NAS)
Transmembrane receptor protein tyrosine kinase signaling pathway GO:0007169
A series of molecular signals initiated by the binding of an extracellular ligand to a receptor on the surface of the target cell where the receptor possesses tyrosine kinase activity, and ending with regulation of a downstream cellular process, e.g. transcription.
1 P07766 (/TAS)
Signal complex assembly GO:0007172
The aggregation, arrangement and bonding together of a set of components to form a complex capable of relaying a signal within a cell.
1 P07766 (/TAS)
G protein-coupled receptor signaling pathway GO:0007186
A series of molecular signals that proceeds with an activated receptor promoting the exchange of GDP for GTP on the alpha-subunit of an associated heterotrimeric G-protein complex. The GTP-bound activated alpha-G-protein then dissociates from the beta- and gamma-subunits to further transmit the signal within the cell. The pathway begins with receptor-ligand interaction, or for basal GPCR signaling the pathway begins with the receptor activating its G protein in the absence of an agonist, and ends with regulation of a downstream cellular process, e.g. transcription. The pathway can start from the plasma membrane, Golgi or nuclear membrane (PMID:24568158 and PMID:16902576).
1 P07766 (/TAS)
Positive regulation of gene expression GO:0010628
Any process that increases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
1 P07766 (/IMP)
Negative regulation of gene expression GO:0010629
Any process that decreases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
1 P07766 (/IMP)
Positive regulation of cell-cell adhesion mediated by integrin GO:0033634
Any process that activates or increases the frequency, rate, or extent of cell-cell adhesion mediated by integrin.
1 P07766 (/ISS)
Positive regulation of T cell proliferation GO:0042102
Any process that activates or increases the rate or extent of T cell proliferation.
1 P07766 (/IMP)
T cell activation GO:0042110
The change in morphology and behavior of a mature or immature T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.
1 P07766 (/NAS)
Regulation of apoptotic process GO:0042981
Any process that modulates the occurrence or rate of cell death by apoptotic process.
1 P07766 (/NAS)
Regulation of immune response GO:0050776
Any process that modulates the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus.
1 P07766 (/TAS)
T cell receptor signaling pathway GO:0050852
A series of molecular signals initiated by the cross-linking of an antigen receptor on a T cell.
1 P07766 (/TAS)
Protein homooligomerization GO:0051260
The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of identical component monomers. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
1 P07766 (/IMP)
Protein-containing complex assembly GO:0065003
The aggregation, arrangement and bonding together of a set of macromolecules to form a protein-containing complex.
1 P07766 (/NAS)

There are 14 GO terms relating to "cellular component"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
3 P07766 (/IDA) P22646 (/IDA) P22646 (/IDA)
External side of plasma membrane GO:0009897
The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
3 P07766 (/IDA) P22646 (/IDA) P22646 (/IDA)
Immunological synapse GO:0001772
An area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell formed through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and the target cell and facilitating activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.
2 P22646 (/IDA) P22646 (/IDA)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
2 P22646 (/ISO) P22646 (/ISO)
Cell-cell junction GO:0005911
A cell junction that forms a connection between two or more cells in a multicellular organism; excludes direct cytoplasmic junctions such as ring canals.
2 P22646 (/IDA) P22646 (/IDA)
External side of plasma membrane GO:0009897
The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
2 P22646 (/ISO) P22646 (/ISO)
T cell receptor complex GO:0042101
A protein complex that contains a disulfide-linked heterodimer of T cell receptor (TCR) chains, which are members of the immunoglobulin superfamily, and mediates antigen recognition, ultimately resulting in T cell activation. The TCR heterodimer is associated with the CD3 complex, which consists of the nonpolymorphic polypeptides gamma, delta, epsilon, zeta, and, in some cases, eta (an RNA splice variant of zeta) or Fc epsilon chains.
2 P22646 (/ISO) P22646 (/ISO)
Alpha-beta T cell receptor complex GO:0042105
A T cell receptor complex in which the TCR heterodimer comprises alpha and beta chains, associated with the CD3 complex; recognizes a complex consisting of an antigen-derived peptide bound to a class I or class II MHC protein.
2 P22646 (/IDA) P22646 (/IDA)
Dendritic spine GO:0043197
A small, membranous protrusion from a dendrite that forms a postsynaptic compartment - typically receiving input from a single presynapse. They function as partially isolated biochemical and an electrical compartments. Spine morphology is variable including \thin\, \stubby\, \mushroom\, and \branched\, with a continuum of intermediate morphologies. They typically terminate in a bulb shape, linked to the dendritic shaft by a restriction. Spine remodeling is though to be involved in synaptic plasticity.
2 P22646 (/IDA) P22646 (/IDA)
Cell body GO:0044297
The portion of a cell bearing surface projections such as axons, dendrites, cilia, or flagella that includes the nucleus, but excludes all cell projections.
2 P22646 (/IDA) P22646 (/IDA)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
1 P07766 (/TAS)
Integral component of plasma membrane GO:0005887
The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 P07766 (/NAS)
T cell receptor complex GO:0042101
A protein complex that contains a disulfide-linked heterodimer of T cell receptor (TCR) chains, which are members of the immunoglobulin superfamily, and mediates antigen recognition, ultimately resulting in T cell activation. The TCR heterodimer is associated with the CD3 complex, which consists of the nonpolymorphic polypeptides gamma, delta, epsilon, zeta, and, in some cases, eta (an RNA splice variant of zeta) or Fc epsilon chains.
1 P07766 (/IDA)
T cell receptor complex GO:0042101
A protein complex that contains a disulfide-linked heterodimer of T cell receptor (TCR) chains, which are members of the immunoglobulin superfamily, and mediates antigen recognition, ultimately resulting in T cell activation. The TCR heterodimer is associated with the CD3 complex, which consists of the nonpolymorphic polypeptides gamma, delta, epsilon, zeta, and, in some cases, eta (an RNA splice variant of zeta) or Fc epsilon chains.
1 P07766 (/NAS)