The name of this superfamily has been modified since the most recent official CATH+ release (v4_4_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 1042: Protein-glutamine gamma-glutamyltransferase 2

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 14 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).
6 P08587 (/IPI) P21980 (/IPI) P21980 (/IPI) P21980 (/IPI) Q6P6R6 (/IPI) Q9WVJ6 (/IPI)
Protein-glutamine gamma-glutamyltransferase activity GO:0003810
Catalysis of the reaction: protein glutamine + alkylamine = protein N5-alkylglutamine + NH3. This reaction is the formation of the N6-(L-isoglutamyl)-L-lysine isopeptide, resulting in cross-linking polypeptide chains; the gamma-carboxamide groups of peptidyl-glutamine residues act as acyl donors, and the 6-amino-groups of peptidyl-lysine residues act as acceptors, to give intra- and intermolecular N6-(5-glutamyl)lysine cross-links.
4 P21980 (/IMP) P21980 (/IMP) P21980 (/IMP) P21981 (/IMP)
Protein-glutamine gamma-glutamyltransferase activity GO:0003810
Catalysis of the reaction: protein glutamine + alkylamine = protein N5-alkylglutamine + NH3. This reaction is the formation of the N6-(L-isoglutamyl)-L-lysine isopeptide, resulting in cross-linking polypeptide chains; the gamma-carboxamide groups of peptidyl-glutamine residues act as acyl donors, and the 6-amino-groups of peptidyl-lysine residues act as acceptors, to give intra- and intermolecular N6-(5-glutamyl)lysine cross-links.
3 P21980 (/ISS) P21980 (/ISS) P21980 (/ISS)
GTP binding GO:0005525
Interacting selectively and non-covalently with GTP, guanosine triphosphate.
2 Q6P6R6 (/IDA) Q9WVJ6 (/IDA)
Enzyme binding GO:0019899
Interacting selectively and non-covalently with any enzyme.
2 Q6P6R6 (/IC) Q9WVJ6 (/IC)
Protein domain specific binding GO:0019904
Interacting selectively and non-covalently with a specific domain of a protein.
2 Q6P6R6 (/IPI) Q9WVJ6 (/IPI)
Protein-glutamine gamma-glutamyltransferase activity GO:0003810
Catalysis of the reaction: protein glutamine + alkylamine = protein N5-alkylglutamine + NH3. This reaction is the formation of the N6-(L-isoglutamyl)-L-lysine isopeptide, resulting in cross-linking polypeptide chains; the gamma-carboxamide groups of peptidyl-glutamine residues act as acyl donors, and the 6-amino-groups of peptidyl-lysine residues act as acceptors, to give intra- and intermolecular N6-(5-glutamyl)lysine cross-links.
1 H0VK88 (/IDA)
Protein-glutamine gamma-glutamyltransferase activity GO:0003810
Catalysis of the reaction: protein glutamine + alkylamine = protein N5-alkylglutamine + NH3. This reaction is the formation of the N6-(L-isoglutamyl)-L-lysine isopeptide, resulting in cross-linking polypeptide chains; the gamma-carboxamide groups of peptidyl-glutamine residues act as acyl donors, and the 6-amino-groups of peptidyl-lysine residues act as acceptors, to give intra- and intermolecular N6-(5-glutamyl)lysine cross-links.
1 P21981 (/ISO)
Calcium ion binding GO:0005509
Interacting selectively and non-covalently with calcium ions (Ca2+).
1 P21981 (/NAS)
GTP binding GO:0005525
Interacting selectively and non-covalently with GTP, guanosine triphosphate.
1 P21981 (/ISO)
GTP binding GO:0005525
Interacting selectively and non-covalently with GTP, guanosine triphosphate.
1 P21981 (/NAS)
Transaminase activity GO:0008483
Catalysis of the transfer of an amino group to an acceptor, usually a 2-oxo acid.
1 P08587 (/IDA)
Transaminase activity GO:0008483
Catalysis of the transfer of an amino group to an acceptor, usually a 2-oxo acid.
1 P21981 (/ISO)
Protein domain specific binding GO:0019904
Interacting selectively and non-covalently with a specific domain of a protein.
1 P21981 (/ISO)

There are 31 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 apoptotic process GO:0043065
Any process that activates or increases the frequency, rate or extent of cell death by apoptotic process.
5 P21980 (/IMP) P21980 (/IMP) P21980 (/IMP) Q6P6R6 (/IMP) Q9WVJ6 (/IMP)
Negative regulation of endoplasmic reticulum calcium ion concentration GO:0032471
Any process that decreases the concentration of calcium ions in the endoplasmic reticulum.
4 P21980 (/IMP) P21980 (/IMP) P21980 (/IMP) P21981 (/IMP)
Positive regulation of mitochondrial calcium ion concentration GO:0051561
Any process that increases the concentration of calcium ions in mitochondria.
4 P21980 (/IMP) P21980 (/IMP) P21980 (/IMP) P21981 (/IMP)
Apoptotic cell clearance GO:0043277
The recognition and removal of an apoptotic cell by a neighboring cell or by a phagocyte.
3 P21980 (/IDA) P21980 (/IDA) P21980 (/IDA)
Positive regulation of cell adhesion GO:0045785
Any process that activates or increases the frequency, rate or extent of cell adhesion.
3 P21980 (/ISS) P21980 (/ISS) P21980 (/ISS)
Blood vessel remodeling GO:0001974
The reorganization or renovation of existing blood vessels.
2 Q6P6R6 (/IMP) Q9WVJ6 (/IMP)
Isopeptide cross-linking via N6-(L-isoglutamyl)-L-lysine GO:0018153
The formation of an isopeptide cross-link between peptidyl-lysine and peptidyl-glutamine to produce N6-(L-isoglutamyl)-L-lysine.
2 Q6P6R6 (/IDA) Q9WVJ6 (/IDA)
Positive regulation of I-kappaB kinase/NF-kappaB signaling GO:0043123
Any process that activates or increases the frequency, rate or extent of I-kappaB kinase/NF-kappaB signaling.
2 Q6P6R6 (/IMP) Q9WVJ6 (/IMP)
Positive regulation of smooth muscle cell proliferation GO:0048661
Any process that activates or increases the rate or extent of smooth muscle cell proliferation.
2 Q6P6R6 (/IDA) Q9WVJ6 (/IDA)
Positive regulation of inflammatory response GO:0050729
Any process that activates or increases the frequency, rate or extent of the inflammatory response.
2 Q6P6R6 (/IMP) Q9WVJ6 (/IMP)
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 Q6P6R6 (/IDA) Q9WVJ6 (/IDA)
Positive regulation of cytosolic calcium ion concentration involved in phospholipase C-activating G protein-coupled signaling pathway GO:0051482
Any process that increases the concentration of calcium ions in the cytosol that occurs as part of a PLC-activating G protein-coupled receptor signaling pathway. G-protein-activated PLC hydrolyses phosphatidylinositol-bisphosphate (PIP2) to release diacylglycerol (DAG) and inositol trisphosphate (IP3). IP3 then binds to calcium release channels in the endoplasmic reticulum (ER) to trigger calcium ion release into the cytosol.
2 Q6P6R6 (/IMP) Q9WVJ6 (/IMP)
Blood vessel remodeling GO:0001974
The reorganization or renovation of existing blood vessels.
1 P21981 (/ISO)
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 P21981 (/TAS)
Phospholipase C-activating G protein-coupled receptor signaling pathway GO:0007200
The series of molecular signals generated as a consequence of a G protein-coupled receptor binding to its physiological ligand, where the pathway proceeds with activation of phospholipase C (PLC) and a subsequent increase in the concentration of inositol trisphosphate (IP3) and diacylglycerol (DAG).
1 Q9WVJ6 (/IDA)
Phospholipase C-activating G protein-coupled receptor signaling pathway GO:0007200
The series of molecular signals generated as a consequence of a G protein-coupled receptor binding to its physiological ligand, where the pathway proceeds with activation of phospholipase C (PLC) and a subsequent increase in the concentration of inositol trisphosphate (IP3) and diacylglycerol (DAG).
1 P21981 (/ISA)
Peptide cross-linking GO:0018149
The formation of a covalent cross-link between or within protein chains.
1 H0VK88 (/IDA)
Peptide cross-linking GO:0018149
The formation of a covalent cross-link between or within protein chains.
1 P21981 (/TAS)
Isopeptide cross-linking via N6-(L-isoglutamyl)-L-lysine GO:0018153
The formation of an isopeptide cross-link between peptidyl-lysine and peptidyl-glutamine to produce N6-(L-isoglutamyl)-L-lysine.
1 P21981 (/ISO)
Negative regulation of endoplasmic reticulum calcium ion concentration GO:0032471
Any process that decreases the concentration of calcium ions in the endoplasmic reticulum.
1 P21981 (/ISO)
Positive regulation of apoptotic process GO:0043065
Any process that activates or increases the frequency, rate or extent of cell death by apoptotic process.
1 P21981 (/ISO)
Positive regulation of I-kappaB kinase/NF-kappaB signaling GO:0043123
Any process that activates or increases the frequency, rate or extent of I-kappaB kinase/NF-kappaB signaling.
1 P21981 (/ISO)
Apoptotic cell clearance GO:0043277
The recognition and removal of an apoptotic cell by a neighboring cell or by a phagocyte.
1 P21981 (/ISO)
Positive regulation of cell adhesion GO:0045785
Any process that activates or increases the frequency, rate or extent of cell adhesion.
1 P21981 (/IMP)
Positive regulation of smooth muscle cell proliferation GO:0048661
Any process that activates or increases the rate or extent of smooth muscle cell proliferation.
1 P21981 (/ISO)
Positive regulation of inflammatory response GO:0050729
Any process that activates or increases the frequency, rate or extent of the inflammatory response.
1 P21981 (/ISO)
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 P21981 (/ISO)
Positive regulation of cytosolic calcium ion concentration involved in phospholipase C-activating G protein-coupled signaling pathway GO:0051482
Any process that increases the concentration of calcium ions in the cytosol that occurs as part of a PLC-activating G protein-coupled receptor signaling pathway. G-protein-activated PLC hydrolyses phosphatidylinositol-bisphosphate (PIP2) to release diacylglycerol (DAG) and inositol trisphosphate (IP3). IP3 then binds to calcium release channels in the endoplasmic reticulum (ER) to trigger calcium ion release into the cytosol.
1 P21981 (/ISO)
Positive regulation of mitochondrial calcium ion concentration GO:0051561
Any process that increases the concentration of calcium ions in mitochondria.
1 P21981 (/ISO)
Branching involved in salivary gland morphogenesis GO:0060445
The process in which the branching structure of the salivary gland is generated and organized.
1 P21981 (/IMP)
Salivary gland cavitation GO:0060662
The process in which the solid core of salivary epithelium gives rise to the hollow tube of the gland.
1 P21981 (/IMP)

There are 17 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
Mitochondrion GO:0005739
A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
5 P21980 (/IDA) P21980 (/IDA) P21980 (/IDA) Q6P6R6 (/IDA) Q9WVJ6 (/IDA)
Collagen-containing extracellular matrix GO:0062023
An extracellular matrix consisting mainly of proteins (especially collagen) and glycosaminoglycans (mostly as proteoglycans) that provides not only essential physical scaffolding for the cellular constituents but can also initiate crucial biochemical and biomechanical cues required for tissue morphogenesis, differentiation and homeostasis. The components are secreted by cells in the vicinity and form a sheet underlying or overlying cells such as endothelial and epithelial cells.
4 P21980 (/HDA) P21980 (/HDA) P21980 (/HDA) P21981 (/HDA)
Cytosol GO:0005829
The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
3 P21980 (/IDA) P21980 (/IDA) P21980 (/IDA)
Focal adhesion GO:0005925
Small region on the surface of a cell that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments.
3 P21980 (/HDA) P21980 (/HDA) P21980 (/HDA)
Intrinsic component of plasma membrane GO:0031226
The component of the plasma membrane consisting of the gene products and protein complexes having either part of their peptide sequence embedded in the hydrophobic region of the membrane or some other covalently attached group such as a GPI anchor that is similarly embedded in the membrane.
3 P21980 (/IDA) P21980 (/IDA) P21980 (/IDA)
Intrinsic component of plasma membrane GO:0031226
The component of the plasma membrane consisting of the gene products and protein complexes having either part of their peptide sequence embedded in the hydrophobic region of the membrane or some other covalently attached group such as a GPI anchor that is similarly embedded in the membrane.
3 P21980 (/IMP) P21980 (/IMP) P21980 (/IMP)
Extracellular exosome GO:0070062
A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
3 P21980 (/HDA) P21980 (/HDA) P21980 (/HDA)
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 Q6P6R6 (/IDA) Q9WVJ6 (/IDA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 Q9WVJ6 (/IDA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 P21981 (/ISA)
Mitochondrion GO:0005739
A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
1 P21981 (/ISO)
Cytosol GO:0005829
The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
1 P21981 (/ISO)
Cytosol GO:0005829
The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
1 P21981 (/TAS)
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 P21981 (/ISO)
Membrane GO:0016020
A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
1 P21981 (/TAS)
Extracellular matrix GO:0031012
A structure lying external to one or more cells, which provides structural support, biochemical or biomechanical cues for cells or tissues.
1 P21981 (/TAS)
Intrinsic component of plasma membrane GO:0031226
The component of the plasma membrane consisting of the gene products and protein complexes having either part of their peptide sequence embedded in the hydrophobic region of the membrane or some other covalently attached group such as a GPI anchor that is similarly embedded in the membrane.
1 P21981 (/ISO)
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