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:

"
EF-hand
".

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 37: calcium-binding protein 1 isoform X2

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 17 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
Nuclear localization sequence binding GO:0008139
Interacting selectively and non-covalently with a nuclear localization sequence, a specific peptide sequence that acts as a signal to localize the protein within the nucleus.
6 Q9JLK7 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9NZU7 (/ISS)
Calcium-dependent protein binding GO:0048306
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules), in the presence of calcium.
5 Q9JLK7 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS)
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).
4 O88751 (/IPI) Q9JLK7 (/IPI) Q9NP86 (/IPI) Q9NZU7 (/IPI)
Calcium ion binding GO:0005509
Interacting selectively and non-covalently with calcium ions (Ca2+).
3 P57796 (/TAS) Q9NPB3 (/TAS) Q9NZU7 (/TAS)
Calcium channel regulator activity GO:0005246
Modulates the activity of a calcium channel.
2 Q9N1Q9 (/ISS) Q9NPB3 (/ISS)
Calcium ion binding GO:0005509
Interacting selectively and non-covalently with calcium ions (Ca2+).
2 P57796 (/NAS) Q9NP86 (/NAS)
Ion channel binding GO:0044325
Interacting selectively and non-covalently with one or more specific sites on an ion channel, a protein complex that spans a membrane and forms a water-filled channel across the phospholipid bilayer allowing selective ion transport down its electrochemical gradient.
2 O88751 (/IPI) P57796 (/IPI)
Calcium-dependent protein binding GO:0048306
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules), in the presence of calcium.
2 O88751 (/IPI) Q9NZU7 (/IPI)
Enzyme inhibitor activity GO:0004857
Binds to and stops, prevents or reduces the activity of an enzyme.
1 Q9NZU7 (/TAS)
Calcium channel regulator activity GO:0005246
Modulates the activity of a calcium channel.
1 Q9JLK4 (/IMP)
Calcium ion binding GO:0005509
Interacting selectively and non-covalently with calcium ions (Ca2+).
1 O88751 (/IDA)
Nuclear localization sequence binding GO:0008139
Interacting selectively and non-covalently with a nuclear localization sequence, a specific peptide sequence that acts as a signal to localize the protein within the nucleus.
1 O88751 (/IDA)
Protein domain specific binding GO:0019904
Interacting selectively and non-covalently with a specific domain of a protein.
1 O88751 (/IPI)
Type 3 metabotropic glutamate receptor binding GO:0031800
Interacting selectively and non-covalently with a type 3 metabotropic glutamate receptor.
1 O88751 (/IPI)
Protein homodimerization activity GO:0042803
Interacting selectively and non-covalently with an identical protein to form a homodimer.
1 O88751 (/IDA)
Ion channel binding GO:0044325
Interacting selectively and non-covalently with one or more specific sites on an ion channel, a protein complex that spans a membrane and forms a water-filled channel across the phospholipid bilayer allowing selective ion transport down its electrochemical gradient.
1 Q8VHC5 (/ISO)
Calcium-dependent protein binding GO:0048306
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules), in the presence of calcium.
1 O88751 (/IDA)

There are 22 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
Visual perception GO:0007601
The series of events required for an organism to receive a visual stimulus, convert it to a molecular signal, and recognize and characterize the signal. Visual stimuli are detected in the form of photons and are processed to form an image.
8 O88751 (/ISS) Q9N1Q9 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9NPB3 (/ISS) Q9NZU7 (/ISS)
Negative regulation of protein import into nucleus GO:0042308
Any process that stops, prevents, or reduces the frequency, rate or extent of the movement of proteins from the cytoplasm into the nucleus.
6 Q9JLK7 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9NZU7 (/ISS)
Visual perception GO:0007601
The series of events required for an organism to receive a visual stimulus, convert it to a molecular signal, and recognize and characterize the signal. Visual stimuli are detected in the form of photons and are processed to form an image.
3 P57796 (/IMP) Q9JLK4 (/IMP) Q9JLK7 (/IMP)
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.
2 P57796 (/NAS) Q9NP86 (/NAS)
Sensory perception of sound GO:0007605
The series of events required for an organism to receive an auditory stimulus, convert it to a molecular signal, and recognize and characterize the signal. Sonic stimuli are detected in the form of vibrations and are processed to form a sound.
2 Q9N1Q9 (/ISS) Q9NPB3 (/ISS)
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 Q9NPB3 (/TAS)
Visual perception GO:0007601
The series of events required for an organism to receive a visual stimulus, convert it to a molecular signal, and recognize and characterize the signal. Visual stimuli are detected in the form of photons and are processed to form an image.
1 Q8VHC5 (/ISO)
Phototransduction GO:0007602
The sequence of reactions within a cell required to convert absorbed photons into a molecular signal.
1 Q8VHC5 (/IMP)
Sensory perception of sound GO:0007605
The series of events required for an organism to receive an auditory stimulus, convert it to a molecular signal, and recognize and characterize the signal. Sonic stimuli are detected in the form of vibrations and are processed to form a sound.
1 Q9JLK4 (/IMP)
Photoreceptor cell morphogenesis GO:0008594
The process in which the structures of a photoreceptor cell are generated and organized. This process occurs while the initially relatively unspecialized cell is acquiring the specialized features of a photoreceptor cell, a sensory cell that reacts to the presence of light. An example of this is found in Drosophila melanogaster.
1 Q8VHC5 (/IMP)
Negative regulation of cell communication by electrical coupling GO:0010651
Any process that decreases the frequency, rate or extent of cell communication via electrical coupling. Cell communication via electrical coupling is the process that mediates signaling interactions between one cell and another cell by transfer of current between their adjacent cytoplasms via intercellular protein channels.
1 O88751 (/IDA)
Negative regulation of protein import into nucleus GO:0042308
Any process that stops, prevents, or reduces the frequency, rate or extent of the movement of proteins from the cytoplasm into the nucleus.
1 O88751 (/IMP)
Retinal cone cell development GO:0046549
Development of a cone cell, one of the sensory cells in the eye that reacts to the presence of light. Cone cells contain the photopigment iodopsin or cyanopsin and are responsible for photopic (daylight) vision.
1 Q8VHC5 (/IMP)
Regulation of synaptic plasticity GO:0048167
A process that modulates synaptic plasticity, the ability of synapses to change as circumstances require. They may alter function, such as increasing or decreasing their sensitivity, or they may increase or decrease in actual numbers.
1 O88751 (/NAS)
Retinal bipolar neuron differentiation GO:0060040
The process in which a relatively unspecialized cell acquires specialized features of a bipolar cell, the last neuron to be generated in the retina.
1 Q8VHC5 (/IMP)
Modification of postsynaptic actin cytoskeleton GO:0098885
Any process that modifies the structure of a postsynaptic actin cytoskeleton.
1 Q9JLK7 (/IDA)
Modification of postsynaptic actin cytoskeleton GO:0098885
Any process that modifies the structure of a postsynaptic actin cytoskeleton.
1 Q9JLK7 (/IMP)
Postsynapse to nucleus signaling pathway GO:0099527
A series of molecular signals that conveys information from the postsynapse to the nucleus via cytoskeletal transport of a protein from a postsynapse to the component to the nucleus where it affects biochemical processes that occur in the nucleus (e.g DNA transcription, mRNA splicing, or DNA/histone modifications).
1 O88751 (/IDA)
Postsynapse to nucleus signaling pathway GO:0099527
A series of molecular signals that conveys information from the postsynapse to the nucleus via cytoskeletal transport of a protein from a postsynapse to the component to the nucleus where it affects biochemical processes that occur in the nucleus (e.g DNA transcription, mRNA splicing, or DNA/histone modifications).
1 O88751 (/IMP)
Regulation of voltage-gated calcium channel activity GO:1901385
Any process that modulates the frequency, rate or extent of voltage-gated calcium channel activity.
1 O88751 (/IDA)
Negative regulation of voltage-gated calcium channel activity GO:1901386
Any process that stops, prevents or reduces the frequency, rate or extent of voltage-gated calcium channel activity.
1 O88751 (/IDA)
Regulation of postsynapse to nucleus signaling pathway GO:1905539
Any process that modulates the frequency, rate or extent of postsynapse to nucleus signaling pathway.
1 O88751 (/IMP)

There are 25 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
Postsynaptic density GO:0014069
An electron dense network of proteins within and adjacent to the postsynaptic membrane of an asymmetric, neuron-neuron synapse. Its major components include neurotransmitter receptors and the proteins that spatially and functionally organize them such as anchoring and scaffolding molecules, signaling enzymes and cytoskeletal components.
4 Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS) Q9N1R0 (/ISS)
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 O88751 (/IDA) P57796 (/IDA) Q9NP86 (/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.
3 Q8VHC5 (/ISO) Q9JLK3 (/ISO) Q9JLK3 (/ISO)
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 O88751 (/IDA) Q9NPB3 (/IDA) Q9NZU7 (/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 Q9JLK4 (/ISO) Q9JLK7 (/ISO)
Postsynaptic density GO:0014069
An electron dense network of proteins within and adjacent to the postsynaptic membrane of an asymmetric, neuron-neuron synapse. Its major components include neurotransmitter receptors and the proteins that spatially and functionally organize them such as anchoring and scaffolding molecules, signaling enzymes and cytoskeletal components.
2 O88751 (/IDA) Q9NZU7 (/IDA)
Glutamatergic synapse GO:0098978
A synapse that uses glutamate as a neurotransmitter.
2 O88751 (/IDA) Q9JLK7 (/IDA)
Glutamatergic synapse GO:0098978
A synapse that uses glutamate as a neurotransmitter.
2 O88751 (/IMP) Q9JLK7 (/IMP)
Golgi membrane GO:0000139
The lipid bilayer surrounding any of the compartments of the Golgi apparatus.
1 Q9NZU7 (/IDA)
Golgi membrane GO:0000139
The lipid bilayer surrounding any of the compartments of the Golgi apparatus.
1 Q9JLK7 (/ISO)
Extracellular region GO:0005576
The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
1 P57796 (/NAS)
Extracellular space GO:0005615
That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
1 Q9NZU7 (/HDA)
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.
1 O88751 (/IDA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 O88751 (/IDA)
Golgi apparatus GO:0005794
A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
1 Q9NPB3 (/IDA)
Golgi apparatus GO:0005794
A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
1 Q9JLK4 (/ISO)
Cytoskeleton GO:0005856
Any of the various filamentous elements that form the internal framework of cells, and typically remain after treatment of the cells with mild detergent to remove membrane constituents and soluble components of the cytoplasm. The term embraces intermediate filaments, microfilaments, microtubules, the microtrabecular lattice, and other structures characterized by a polymeric filamentous nature and long-range order within the cell. The various elements of the cytoskeleton not only serve in the maintenance of cellular shape but also have roles in other cellular functions, including cellular movement, cell division, endocytosis, and movement of organelles.
1 O88751 (/IDA)
Cytoplasmic side of plasma membrane GO:0009898
The leaflet the plasma membrane that faces the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
1 O88751 (/IDA)
Dendrite GO:0030425
A neuron projection that has a short, tapering, morphology. Dendrites receive and integrate signals from other neurons or from sensory stimuli, and conduct nerve impulses towards the axon or the cell body. In most neurons, the impulse is conveyed from dendrites to axon via the cell body, but in some types of unipolar neuron, the impulse does not travel via the cell body.
1 O88751 (/IDA)
Protein-containing complex GO:0032991
A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together.
1 O88751 (/IDA)
Neuronal cell body GO:0043025
The portion of a neuron that includes the nucleus, but excludes cell projections such as axons and dendrites.
1 O88751 (/IDA)
Terminal bouton GO:0043195
Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal bouton is a specialized region of it.
1 P57796 (/TAS)
Synapse GO:0045202
The junction between a nerve fiber of one neuron and another neuron, muscle fiber or glial cell. As the nerve fiber approaches the synapse it enlarges into a specialized structure, the presynaptic nerve ending, which contains mitochondria and synaptic vesicles. At the tip of the nerve ending is the presynaptic membrane; facing it, and separated from it by a minute cleft (the synaptic cleft) is a specialized area of membrane on the receiving cell, known as the postsynaptic membrane. In response to the arrival of nerve impulses, the presynaptic nerve ending secretes molecules of neurotransmitters into the synaptic cleft. These diffuse across the cleft and transmit the signal to the postsynaptic membrane.
1 P57796 (/TAS)
Perinuclear region of cytoplasm GO:0048471
Cytoplasm situated near, or occurring around, the nucleus.
1 O88751 (/IDA)
Glutamatergic postsynaptic density GO:0099573
The post-synaptic specialization of a glutamatergic excitatory synapse.
1 O88751 (/IDA)