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:

"
Ribonuclease Inhibitor
".

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 105: S-phase kinase-associated protein 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 3 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).
7 B2GUZ0 (/IPI) Q13309 (/IPI) Q13309 (/IPI) Q13309 (/IPI) Q7YZ95 (/IPI) Q9Z0Z3 (/IPI) Q9Z0Z3 (/IPI)
Identical protein binding GO:0042802
Interacting selectively and non-covalently with an identical protein or proteins.
3 Q13309 (/IPI) Q13309 (/IPI) Q13309 (/IPI)
Identical protein binding GO:0042802
Interacting selectively and non-covalently with an identical protein or proteins.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)

There are 35 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
G1/S transition of mitotic cell cycle GO:0000082
The mitotic cell cycle transition by which a cell in G1 commits to S phase. The process begins with the build up of G1 cyclin-dependent kinase (G1 CDK), resulting in the activation of transcription of G1 cyclins. The process ends with the positive feedback of the G1 cyclins on the G1 CDK which commits the cell to S phase, in which DNA replication is initiated.
3 Q13309 (/TAS) Q13309 (/TAS) Q13309 (/TAS)
Protein polyubiquitination GO:0000209
Addition of multiple ubiquitin groups to a protein, forming a ubiquitin chain.
3 Q13309 (/TAS) Q13309 (/TAS) Q13309 (/TAS)
Protein deubiquitination GO:0016579
The removal of one or more ubiquitin groups from a protein.
3 Q13309 (/TAS) Q13309 (/TAS) Q13309 (/TAS)
Regulation of apoptotic process GO:0042981
Any process that modulates the occurrence or rate of cell death by apoptotic process.
3 Q13309 (/IDA) Q13309 (/IDA) Q13309 (/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.
3 Q13309 (/IMP) Q13309 (/IMP) Q13309 (/IMP)
Post-translational protein modification GO:0043687
The process of covalently altering one or more amino acids in a protein after the protein has been completely translated and released from the ribosome.
3 Q13309 (/TAS) Q13309 (/TAS) Q13309 (/TAS)
Innate immune response GO:0045087
Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
3 Q13309 (/IMP) Q13309 (/IMP) Q13309 (/IMP)
Defense response to virus GO:0051607
Reactions triggered in response to the presence of a virus that act to protect the cell or organism.
3 Q13309 (/IMP) Q13309 (/IMP) Q13309 (/IMP)
Protein K48-linked ubiquitination GO:0070936
A protein ubiquitination process in which a polymer of ubiquitin, formed by linkages between lysine residues at position 48 of the ubiquitin monomers, is added to a protein. K48-linked ubiquitination targets the substrate protein for degradation.
3 Q13309 (/IMP) Q13309 (/IMP) Q13309 (/IMP)
G1/S transition of mitotic cell cycle GO:0000082
The mitotic cell cycle transition by which a cell in G1 commits to S phase. The process begins with the build up of G1 cyclin-dependent kinase (G1 CDK), resulting in the activation of transcription of G1 cyclins. The process ends with the positive feedback of the G1 cyclins on the G1 CDK which commits the cell to S phase, in which DNA replication is initiated.
2 Q9Z0Z3 (/IDA) Q9Z0Z3 (/IDA)
G2/M transition of mitotic cell cycle GO:0000086
The mitotic cell cycle transition by which a cell in G2 commits to M phase. The process begins when the kinase activity of M cyclin/CDK complex reaches a threshold high enough for the cell cycle to proceed. This is accomplished by activating a positive feedback loop that results in the accumulation of unphosphorylated and active M cyclin/CDK complex.
2 Q9Z0Z3 (/IGI) Q9Z0Z3 (/IGI)
G2/M transition of mitotic cell cycle GO:0000086
The mitotic cell cycle transition by which a cell in G2 commits to M phase. The process begins when the kinase activity of M cyclin/CDK complex reaches a threshold high enough for the cell cycle to proceed. This is accomplished by activating a positive feedback loop that results in the accumulation of unphosphorylated and active M cyclin/CDK complex.
2 Q9Z0Z3 (/IMP) Q9Z0Z3 (/IMP)
Protein polyubiquitination GO:0000209
Addition of multiple ubiquitin groups to a protein, forming a ubiquitin chain.
2 Q9Z0Z3 (/IDA) Q9Z0Z3 (/IDA)
Mitotic cell cycle GO:0000278
Progression through the phases of the mitotic cell cycle, the most common eukaryotic cell cycle, which canonically comprises four successive phases called G1, S, G2, and M and includes replication of the genome and the subsequent segregation of chromosomes into daughter cells. In some variant cell cycles nuclear replication or nuclear division may not be followed by cell division, or G1 and G2 phases may be absent.
2 Q7YZ95 (/IMP) Q9VN08 (/IMP)
Ubiquitin-dependent protein catabolic process GO:0006511
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 a ubiquitin group, or multiple ubiquitin groups, to the protein.
2 Q9Z0Z3 (/IDA) Q9Z0Z3 (/IDA)
Ubiquitin-dependent protein catabolic process GO:0006511
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 a ubiquitin group, or multiple ubiquitin groups, to the protein.
2 Q9Z0Z3 (/IMP) Q9Z0Z3 (/IMP)
Endomitotic cell cycle GO:0007113
A mitotic cell cycle in which chromosomes are replicated and sister chromatids separate, but spindle formation, nuclear membrane breakdown and nuclear division do not occur, resulting in an increased number of chromosomes in the cell.
2 Q7YZ95 (/IMP) Q9VN08 (/IMP)
SCF-dependent proteasomal ubiquitin-dependent protein catabolic process GO:0031146
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, with ubiquitin-protein ligation catalyzed by an SCF (Skp1/Cul1/F-box protein) complex, and mediated by the proteasome.
2 Q7YZ95 (/ISM) Q9VN08 (/ISM)
Regulation of protein stability GO:0031647
Any process that affects the structure and integrity of a protein, altering the likelihood of its degradation or aggregation.
2 Q7YZ95 (/IMP) Q9VN08 (/IMP)
Positive regulation of intracellular estrogen receptor signaling pathway GO:0033148
Any process that activates or increases the frequency, rate or extent of the activity of an intracellular estrogen receptor signaling pathway.
2 Q9Z0Z3 (/IGI) Q9Z0Z3 (/IGI)
Wing disc development GO:0035220
Progression of the wing disc over time, from its initial formation through to its metamorphosis to form adult structures including the wing hinge, wing blade and pleura.
2 Q7YZ95 (/IMP) Q9VN08 (/IMP)
Regulation of apoptotic process GO:0042981
Any process that modulates the occurrence or rate of cell death by apoptotic process.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/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 Q9Z0Z3 (/ISO) Q9Z0Z3 (/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 Q9Z0Z3 (/ISS) Q9Z0Z3 (/ISS)
Innate immune response GO:0045087
Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
Positive regulation of cell cycle GO:0045787
Any process that activates or increases the rate or extent of progression through the cell cycle.
2 Q7YZ95 (/IMP) Q9VN08 (/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 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
Compound eye development GO:0048749
The process whose specific outcome is the progression of the compound eye over time, from its formation to the mature structure. The compound eye is an organ of sight that contains multiple repeating units, often arranged hexagonally. Each unit has its own lens and photoreceptor cell(s) and can generate either a single pixelated image or multiple images, per eye.
2 Q7YZ95 (/IMP) Q9VN08 (/IMP)
Defense response to virus GO:0051607
Reactions triggered in response to the presence of a virus that act to protect the cell or organism.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
Regulation of cell cycle GO:0051726
Any process that modulates the rate or extent of progression through the cell cycle.
2 Q9Z0Z3 (/IPI) Q9Z0Z3 (/IPI)
Protein K48-linked ubiquitination GO:0070936
A protein ubiquitination process in which a polymer of ubiquitin, formed by linkages between lysine residues at position 48 of the ubiquitin monomers, is added to a protein. K48-linked ubiquitination targets the substrate protein for degradation.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
Protein K48-linked ubiquitination GO:0070936
A protein ubiquitination process in which a polymer of ubiquitin, formed by linkages between lysine residues at position 48 of the ubiquitin monomers, is added to a protein. K48-linked ubiquitination targets the substrate protein for degradation.
2 Q9Z0Z3 (/ISS) Q9Z0Z3 (/ISS)
Positive regulation of protein polyubiquitination GO:1902916
Any process that activates or increases the frequency, rate or extent of protein polyubiquitination.
2 Q9Z0Z3 (/IDA) Q9Z0Z3 (/IDA)
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 B2GUZ0 (/IMP)
Cellular response to cell-matrix adhesion GO:0071460
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of cell-matrix adhesion.
1 B2GUZ0 (/IEP)

There are 12 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.
7 A0A024R069 (/IDA) A0A024R069 (/IDA) A0A024R069 (/IDA) A0A0A0MTL5 (/IDA) Q13309 (/IDA) Q13309 (/IDA) Q13309 (/IDA)
Nucleolus GO:0005730
A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
7 A0A024R069 (/IDA) A0A024R069 (/IDA) A0A024R069 (/IDA) A0A0A0MTL5 (/IDA) Q13309 (/IDA) Q13309 (/IDA) Q13309 (/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.
7 A0A024R069 (/IDA) A0A024R069 (/IDA) A0A024R069 (/IDA) A0A0A0MTL5 (/IDA) Q13309 (/IDA) Q13309 (/IDA) Q13309 (/IDA)
SCF ubiquitin ligase complex GO:0019005
A ubiquitin ligase complex in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1).
7 Q13309 (/IDA) Q13309 (/IDA) Q13309 (/IDA) Q7YZ95 (/IDA) Q9VN08 (/IDA) Q9Z0Z3 (/IDA) Q9Z0Z3 (/IDA)
Nucleoplasm GO:0005654
That part of the nuclear content other than the chromosomes or the nucleolus.
3 Q13309 (/TAS) Q13309 (/TAS) Q13309 (/TAS)
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 Q13309 (/TAS) Q13309 (/TAS) Q13309 (/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 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
Nucleolus GO:0005730
A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/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.
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
SCF ubiquitin ligase complex GO:0019005
A ubiquitin ligase complex in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1).
2 Q7YZ95 (/ISM) Q9VN08 (/ISM)
SCF ubiquitin ligase complex GO:0019005
A ubiquitin ligase complex in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1).
2 Q9Z0Z3 (/ISO) Q9Z0Z3 (/ISO)
SCF ubiquitin ligase complex GO:0019005
A ubiquitin ligase complex in which a cullin from the Cul1 subfamily and a RING domain protein form the catalytic core; substrate specificity is conferred by a Skp1 adaptor and an F-box protein. SCF complexes are involved in targeting proteins for degradation by the proteasome. The best characterized complexes are those from yeast and mammals (with core subunits named Cdc53/Cul1, Rbx1/Hrt1/Roc1).
2 Q9Z0Z3 (/ISS) Q9Z0Z3 (/ISS)
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