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: waiting to be named.

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 23: E3 ubiquitin-protein ligase

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 O00308 (/IPI) O00308 (/IPI) Q8BZZ3 (/IPI) Q9DBH0 (/IPI) Q9DBH0 (/IPI) Q9H0M0 (/IPI)
Ubiquitin-protein transferase activity GO:0004842
Catalysis of the transfer of ubiquitin from one protein to another via the reaction X-Ub + Y --> Y-Ub + X, where both X-Ub and Y-Ub are covalent linkages.
5 O00308 (/IDA) O00308 (/IDA) Q8BZZ3 (/IDA) Q9DBH0 (/IDA) Q9DBH0 (/IDA)
RNA polymerase II transcription factor binding GO:0001085
Interacting selectively and non-covalently with an RNA polymerase II transcription factor, any protein required to initiate or regulate transcription by RNA polymerase II.
4 O00308 (/IPI) O00308 (/IPI) Q9DBH0 (/IPI) Q9DBH0 (/IPI)
Ubiquitin-protein transferase activity GO:0004842
Catalysis of the transfer of ubiquitin from one protein to another via the reaction X-Ub + Y --> Y-Ub + X, where both X-Ub and Y-Ub are covalent linkages.
4 O00308 (/TAS) O00308 (/TAS) Q8BZZ3 (/TAS) Q9H0M0 (/TAS)
Ubiquitin protein ligase activity GO:0061630
Catalysis of the transfer of ubiquitin to a substrate protein via the reaction X-ubiquitin + S -> X + S-ubiquitin, where X is either an E2 or E3 enzyme, the X-ubiquitin linkage is a thioester bond, and the S-ubiquitin linkage is an amide bond: an isopeptide bond between the C-terminal glycine of ubiquitin and the epsilon-amino group of lysine residues in the substrate or, in the linear extension of ubiquitin chains, a peptide bond the between the C-terminal glycine and N-terminal methionine of ubiquitin residues.
3 Q8BZZ3 (/IDA) Q9DBH0 (/IDA) Q9DBH0 (/IDA)
RNA polymerase II transcription factor binding GO:0001085
Interacting selectively and non-covalently with an RNA polymerase II transcription factor, any protein required to initiate or regulate transcription by RNA polymerase II.
2 Q9DBH0 (/IGI) Q9DBH0 (/IGI)
RNA polymerase II transcription factor binding GO:0001085
Interacting selectively and non-covalently with an RNA polymerase II transcription factor, any protein required to initiate or regulate transcription by RNA polymerase II.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
RNA polymerase II transcription factor binding GO:0001085
Interacting selectively and non-covalently with an RNA polymerase II transcription factor, any protein required to initiate or regulate transcription by RNA polymerase II.
2 O00308 (/ISS) O00308 (/ISS)
Ubiquitin-protein transferase activity GO:0004842
Catalysis of the transfer of ubiquitin from one protein to another via the reaction X-Ub + Y --> Y-Ub + X, where both X-Ub and Y-Ub are covalent linkages.
2 O00308 (/IMP) O00308 (/IMP)
Ubiquitin-protein transferase activity GO:0004842
Catalysis of the transfer of ubiquitin from one protein to another via the reaction X-Ub + Y --> Y-Ub + X, where both X-Ub and Y-Ub are covalent linkages.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Transcription factor binding GO:0008134
Interacting selectively and non-covalently with a transcription factor, a protein required to initiate or regulate transcription.
2 O00308 (/IPI) O00308 (/IPI)
Transcription factor binding GO:0008134
Interacting selectively and non-covalently with a transcription factor, a protein required to initiate or regulate transcription.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Ubiquitin protein ligase activity GO:0061630
Catalysis of the transfer of ubiquitin to a substrate protein via the reaction X-ubiquitin + S -> X + S-ubiquitin, where X is either an E2 or E3 enzyme, the X-ubiquitin linkage is a thioester bond, and the S-ubiquitin linkage is an amide bond: an isopeptide bond between the C-terminal glycine of ubiquitin and the epsilon-amino group of lysine residues in the substrate or, in the linear extension of ubiquitin chains, a peptide bond the between the C-terminal glycine and N-terminal methionine of ubiquitin residues.
2 O00308 (/TAS) O00308 (/TAS)
Ubiquitin protein ligase activity GO:0061630
Catalysis of the transfer of ubiquitin to a substrate protein via the reaction X-ubiquitin + S -> X + S-ubiquitin, where X is either an E2 or E3 enzyme, the X-ubiquitin linkage is a thioester bond, and the S-ubiquitin linkage is an amide bond: an isopeptide bond between the C-terminal glycine of ubiquitin and the epsilon-amino group of lysine residues in the substrate or, in the linear extension of ubiquitin chains, a peptide bond the between the C-terminal glycine and N-terminal methionine of ubiquitin residues.
1 Q8BZZ3 (/EXP)

There are 43 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
Protein ubiquitination GO:0016567
The process in which one or more ubiquitin groups are added to a protein.
5 O00308 (/IDA) O00308 (/IDA) Q8BZZ3 (/IDA) Q9DBH0 (/IDA) Q9DBH0 (/IDA)
Proteasome-mediated ubiquitin-dependent protein catabolic process GO:0043161
The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, and mediated by the proteasome.
5 O00308 (/IMP) O00308 (/IMP) Q8BZZ3 (/IMP) Q9DBH0 (/IMP) Q9DBH0 (/IMP)
Negative regulation of transcription, DNA-templated GO:0045892
Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.
3 Q8BZZ3 (/IDA) Q9DBH0 (/IDA) Q9DBH0 (/IDA)
Negative regulation of transcription, DNA-templated GO:0045892
Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.
3 O00308 (/ISS) O00308 (/ISS) Q9H0M0 (/ISS)
Viral entry into host cell GO:0046718
The process that occurs after viral attachment by which a virus, or viral nucleic acid, breaches the plasma membrane or cell envelope and enters the host cell. The process ends when the viral nucleic acid is released into the host cell cytoplasm.
3 O00308 (/TAS) O00308 (/TAS) Q9H0M0 (/TAS)
Negative regulation of transcription by RNA polymerase II GO:0000122
Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.
2 Q9DBH0 (/IDA) Q9DBH0 (/IDA)
Negative regulation of transcription by RNA polymerase II GO:0000122
Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.
2 O00308 (/IMP) O00308 (/IMP)
Negative regulation of transcription by RNA polymerase II GO:0000122
Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Negative regulation of transcription by RNA polymerase II GO:0000122
Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.
2 O00308 (/ISS) O00308 (/ISS)
Cellular protein modification process GO:0006464
The covalent alteration of one or more amino acids occurring in proteins, peptides and nascent polypeptides (co-translational, post-translational modifications) occurring at the level of an individual cell. Includes the modification of charged tRNAs that are destined to occur in a protein (pre-translation modification).
2 O00308 (/TAS) O00308 (/TAS)
Extracellular transport GO:0006858
The transport of substances that occurs outside cells.
2 O00308 (/IMP) O00308 (/IMP)
Extracellular transport GO:0006858
The transport of substances that occurs outside cells.
2 Q9DBH0 (/ISO) Q9DBH0 (/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 O00308 (/IMP) O00308 (/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.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Protein ubiquitination GO:0016567
The process in which one or more ubiquitin groups are added to a protein.
2 O00308 (/IMP) O00308 (/IMP)
Protein ubiquitination GO:0016567
The process in which one or more ubiquitin groups are added to a protein.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Protein ubiquitination GO:0016567
The process in which one or more ubiquitin groups are added to a protein.
2 Q9DBH0 (/ISS) Q9DBH0 (/ISS)
Protein ubiquitination GO:0016567
The process in which one or more ubiquitin groups are added to a protein.
2 Q8BZZ3 (/TAS) Q9H0M0 (/TAS)
Negative regulation of transporter activity GO:0032410
Any process that stops or reduces the activity of a transporter.
2 O00308 (/IDA) O00308 (/IDA)
Negative regulation of transporter activity GO:0032410
Any process that stops or reduces the activity of a transporter.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Regulation of ion transmembrane transport GO:0034765
Any process that modulates the frequency, rate or extent of the directed movement of ions from one side of a membrane to the other.
2 O00308 (/IDA) O00308 (/IDA)
Regulation of ion transmembrane transport GO:0034765
Any process that modulates the frequency, rate or extent of the directed movement of ions from one side of a membrane to the other.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Regulation of membrane potential GO:0042391
Any process that modulates the establishment or extent of a membrane potential, the electric potential existing across any membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane.
2 O00308 (/IDA) O00308 (/IDA)
Regulation of membrane potential GO:0042391
Any process that modulates the establishment or extent of a membrane potential, the electric potential existing across any membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Proteasome-mediated ubiquitin-dependent protein catabolic process GO:0043161
The chemical reactions and pathways resulting in the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, and mediated by the proteasome.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Negative regulation of DNA-binding transcription factor activity GO:0043433
Any process that stops, prevents, or reduces the frequency, rate or extent of the activity of a transcription factor, any factor involved in the initiation or regulation of transcription.
2 Q9DBH0 (/IDA) Q9DBH0 (/IDA)
Negative regulation of DNA-binding transcription factor activity GO:0043433
Any process that stops, prevents, or reduces the frequency, rate or extent of the activity of a transcription factor, any factor involved in the initiation or regulation of transcription.
2 O00308 (/ISS) O00308 (/ISS)
Negative regulation of Notch signaling pathway GO:0045746
Any process that stops, prevents, or reduces the frequency, rate or extent of the Notch signaling pathway.
2 O00308 (/TAS) O00308 (/TAS)
Positive regulation of transcription by RNA polymerase II GO:0045944
Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.
2 Q9DBH0 (/IGI) Q9DBH0 (/IGI)
Negative regulation of protein transport GO:0051224
Any process that stops, prevents, or reduces the frequency, rate or extent of the directed movement of a protein into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
2 O00308 (/IMP) O00308 (/IMP)
Negative regulation of protein transport GO:0051224
Any process that stops, prevents, or reduces the frequency, rate or extent of the directed movement of a protein into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Protein autoubiquitination GO:0051865
The ubiquitination by a protein of one or more of its own amino acid residues, or residues on an identical protein. Ubiquitination occurs on the lysine residue by formation of an isopeptide crosslink.
2 O00308 (/IDA) O00308 (/IDA)
Protein autoubiquitination GO:0051865
The ubiquitination by a protein of one or more of its own amino acid residues, or residues on an identical protein. Ubiquitination occurs on the lysine residue by formation of an isopeptide crosslink.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Roof of mouth development GO:0060021
The biological process whose specific outcome is the progression of the roof of the mouth from an initial condition to its mature state. This process begins with the formation of the structure and ends with the mature structure. The roof of the mouth is the partition that separates the nasal and oral cavities.
2 A2VCZ7 (/IMP) F6P346 (/IMP)
Protein K63-linked ubiquitination GO:0070534
A protein ubiquitination process in which a polymer of ubiquitin, formed by linkages between lysine residues at position 63 of the ubiquitin monomers, is added to a protein. K63-linked ubiquitination does not target the substrate protein for degradation, but is involved in several pathways, notably as a signal to promote error-free DNA postreplication repair.
2 Q9DBH0 (/IMP) Q9DBH0 (/IMP)
Protein K63-linked ubiquitination GO:0070534
A protein ubiquitination process in which a polymer of ubiquitin, formed by linkages between lysine residues at position 63 of the ubiquitin monomers, is added to a protein. K63-linked ubiquitination does not target the substrate protein for degradation, but is involved in several pathways, notably as a signal to promote error-free DNA postreplication repair.
2 O00308 (/ISS) O00308 (/ISS)
Regulation of potassium ion transmembrane transporter activity GO:1901016
Any process that modulates the frequency, rate or extent of potassium ion transmembrane transporter activity.
2 O00308 (/IDA) O00308 (/IDA)
Regulation of potassium ion transmembrane transporter activity GO:1901016
Any process that modulates the frequency, rate or extent of potassium ion transmembrane transporter activity.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Signal transduction GO:0007165
The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
1 Q9H0M0 (/NAS)
Central nervous system development GO:0007417
The process whose specific outcome is the progression of the central nervous system over time, from its formation to the mature structure. The central nervous system is the core nervous system that serves an integrating and coordinating function. In vertebrates it consists of the brain and spinal cord. In those invertebrates with a central nervous system it typically consists of a brain, cerebral ganglia and a nerve cord.
1 Q9H0M0 (/NAS)
T cell differentiation GO:0030217
The process in which a precursor cell type acquires characteristics of a more mature T-cell. A T cell is a type of lymphocyte whose definin characteristic is the expression of a T cell receptor complex.
1 Q8BZZ3 (/TAS)
Lung development GO:0030324
The process whose specific outcome is the progression of the lung over time, from its formation to the mature structure. In all air-breathing vertebrates the lungs are developed from the ventral wall of the oesophagus as a pouch which divides into two sacs. In amphibians and many reptiles the lungs retain very nearly this primitive sac-like character, but in the higher forms the connection with the esophagus becomes elongated into the windpipe and the inner walls of the sacs become more and more divided, until, in the mammals, the air spaces become minutely divided into tubes ending in small air cells, in the walls of which the blood circulates in a fine network of capillaries. In mammals the lungs are more or less divided into lobes, and each lung occupies a separate cavity in the thorax.
1 Q8BZZ3 (/TAS)
Ion transmembrane transport GO:0034220
A process in which an ion is transported across a membrane.
1 Q9H0M0 (/TAS)

There are 10 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
Nucleus GO:0005634
A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
4 O00308 (/IDA) O00308 (/IDA) Q9DBH0 (/IDA) Q9DBH0 (/IDA)
Cytosol GO:0005829
The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
4 O00308 (/TAS) O00308 (/TAS) Q8BZZ3 (/TAS) Q9H0M0 (/TAS)
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 O00308 (/HDA) O00308 (/HDA) Q9H0M0 (/HDA)
Ubiquitin ligase complex GO:0000151
A protein complex that includes a ubiquitin-protein ligase and enables ubiquitin protein ligase activity. The complex also contains other proteins that may confer substrate specificity on the complex.
2 O00308 (/TAS) O00308 (/TAS)
Nucleus GO:0005634
A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
2 Q9DBH0 (/ISO) Q9DBH0 (/ISO)
Nucleus GO:0005634
A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
2 A2VCZ7 (/ISS) F6P346 (/ISS)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
2 Q9DBH0 (/IDA) Q9DBH0 (/IDA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
2 O00308 (/ISS) O00308 (/ISS)
Membrane GO:0016020
A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
2 O00308 (/HDA) O00308 (/HDA)
Ubiquitin ligase complex GO:0000151
A protein complex that includes a ubiquitin-protein ligase and enables ubiquitin protein ligase activity. The complex also contains other proteins that may confer substrate specificity on the complex.
1 Q9H0M0 (/NAS)
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