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 5: Serum albumin

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 35 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
Enterobactin binding GO:1903981
Interacting selectively and non-covalently with enterobactin.
19 A2V9Z4 (/ISS) A2V9Z4 (/ISS) A6YF56 (/ISS) A6YF56 (/ISS) A6YF56 (/ISS) O35090 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS)
(9 more)
DNA binding GO:0003677
Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Drug binding GO:0008144
Interacting selectively and non-covalently with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Toxic substance binding GO:0015643
Interacting selectively and non-covalently with a toxic substance, a poisonous substance that causes damage to biological systems.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Pyridoxal phosphate binding GO:0030170
Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Fatty acid binding GO:0005504
Interacting selectively and non-covalently with fatty acids, aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.
10 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS) Q28522 (/ISS) Q5XLE4 (/ISS)
DNA binding GO:0003677
Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
2 P07724 (/ISO) P07724 (/ISO)
Fatty acid binding GO:0005504
Interacting selectively and non-covalently with fatty acids, aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.
2 P02768 (/IDA) P02770 (/IDA)
Fatty acid binding GO:0005504
Interacting selectively and non-covalently with fatty acids, aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.
2 P07724 (/ISO) P07724 (/ISO)
Drug binding GO:0008144
Interacting selectively and non-covalently with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease.
2 P07724 (/ISO) P07724 (/ISO)
Zinc ion binding GO:0008270
Interacting selectively and non-covalently with zinc (Zn) ions.
2 P07724 (/ISO) P07724 (/ISO)
Toxic substance binding GO:0015643
Interacting selectively and non-covalently with a toxic substance, a poisonous substance that causes damage to biological systems.
2 P07724 (/ISO) P07724 (/ISO)
Enzyme binding GO:0019899
Interacting selectively and non-covalently with any enzyme.
2 P07724 (/ISO) P07724 (/ISO)
Pyridoxal phosphate binding GO:0030170
Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
2 P07724 (/ISO) P07724 (/ISO)
Identical protein binding GO:0042802
Interacting selectively and non-covalently with an identical protein or proteins.
2 P07724 (/ISO) P07724 (/ISO)
Chaperone binding GO:0051087
Interacting selectively and non-covalently with a chaperone protein, a class of proteins that bind to nascent or unfolded polypeptides and ensure correct folding or transport.
2 P07724 (/ISO) P07724 (/ISO)
Exogenous protein binding GO:0140272
Interacting selectively and non-covalently with any protein or protein complex from a different species, for example a pathogen molecule binding to a host protein (a complex of two or more proteins that may include other nonprotein molecules).
2 P07724 (/ISO) P07724 (/ISO)
Enterobactin binding GO:1903981
Interacting selectively and non-covalently with enterobactin.
2 P02768 (/IDA) P02769 (/IDA)
Enterobactin binding GO:1903981
Interacting selectively and non-covalently with enterobactin.
2 P07724 (/ISO) P07724 (/ISO)
DNA binding GO:0003677
Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
1 P02768 (/IDA)
Fatty acid binding GO:0005504
Interacting selectively and non-covalently with fatty acids, aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.
1 P02768 (/NAS)
Copper ion binding GO:0005507
Interacting selectively and non-covalently with copper (Cu) ions.
1 P02768 (/NAS)
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).
1 P02768 (/IPI)
Drug binding GO:0008144
Interacting selectively and non-covalently with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease.
1 P02768 (/IDA)
Drug binding GO:0008144
Interacting selectively and non-covalently with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease.
1 P02770 (/IPI)
Drug binding GO:0008144
Interacting selectively and non-covalently with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease.
1 P02768 (/NAS)
Zinc ion binding GO:0008270
Interacting selectively and non-covalently with zinc (Zn) ions.
1 P02770 (/IDA)
Toxic substance binding GO:0015643
Interacting selectively and non-covalently with a toxic substance, a poisonous substance that causes damage to biological systems.
1 P02768 (/IDA)
Antioxidant activity GO:0016209
Inhibition of the reactions brought about by dioxygen (O2) or peroxides. Usually the antioxidant is effective because it can itself be more easily oxidized than the substance protected. The term is often applied to components that can trap free radicals, thereby breaking the chain reaction that normally leads to extensive biological damage.
1 P02768 (/NAS)
Enzyme binding GO:0019899
Interacting selectively and non-covalently with any enzyme.
1 P02770 (/IPI)
Pyridoxal phosphate binding GO:0030170
Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
1 P02768 (/IDA)
Small molecule binding GO:0036094
Interacting selectively and non-covalently with a small molecule, any low molecular weight, monomeric, non-encoded molecule.
1 P08835 (/IPI)
Identical protein binding GO:0042802
Interacting selectively and non-covalently with an identical protein or proteins.
1 P02768 (/IPI)
Chaperone binding GO:0051087
Interacting selectively and non-covalently with a chaperone protein, a class of proteins that bind to nascent or unfolded polypeptides and ensure correct folding or transport.
1 P02768 (/IPI)
Exogenous protein binding GO:0140272
Interacting selectively and non-covalently with any protein or protein complex from a different species, for example a pathogen molecule binding to a host protein (a complex of two or more proteins that may include other nonprotein molecules).
1 P02768 (/IDA)

There are 25 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
Cellular response to starvation GO:0009267
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 deprivation of nourishment.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Negative regulation of apoptotic process GO:0043066
Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Maintenance of mitochondrion location GO:0051659
Any process in which a mitochondrion is maintained in a specific location within a cell and prevented from moving elsewhere.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
Cellular response to starvation GO:0009267
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 deprivation of nourishment.
2 P07724 (/ISO) P07724 (/ISO)
Negative regulation of protein oligomerization GO:0032460
Any process that stops, prevents, or reduces the frequency, rate or extent of protein oligomerization.
2 P07724 (/ISO) P07724 (/ISO)
Negative regulation of apoptotic process GO:0043066
Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
2 P07724 (/ISO) P07724 (/ISO)
Positive regulation of circadian sleep/wake cycle, non-REM sleep GO:0046010
Any process that activates or increases the duration or quality of non-rapid eye movement (NREM) sleep.
2 P07724 (/ISO) P07724 (/ISO)
Maintenance of mitochondrion location GO:0051659
Any process in which a mitochondrion is maintained in a specific location within a cell and prevented from moving elsewhere.
2 P07724 (/ISO) P07724 (/ISO)
Retina homeostasis GO:0001895
A tissue homeostatic process involved in the maintenance of an internal equilibrium within the retina of the eye, including control of cellular proliferation and death and control of metabolic function.
1 P02768 (/HEP)
Platelet degranulation GO:0002576
The regulated exocytosis of secretory granules containing preformed mediators such as histamine and serotonin by a platelet.
1 P02768 (/TAS)
Receptor-mediated endocytosis GO:0006898
An endocytosis process in which cell surface receptors ensure specificity of transport. A specific receptor on the cell surface binds tightly to the extracellular macromolecule (the ligand) that it recognizes; the plasma-membrane region containing the receptor-ligand complex then undergoes endocytosis, forming a transport vesicle containing the receptor-ligand complex and excluding most other plasma-membrane proteins. Receptor-mediated endocytosis generally occurs via clathrin-coated pits and vesicles.
1 P02768 (/TAS)
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.
1 P02770 (/IEP)
Cellular response to starvation GO:0009267
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 deprivation of nourishment.
1 P02768 (/IDA)
Response to organic substance GO:0010033
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 an organic substance stimulus.
1 P02770 (/IEP)
Negative regulation of protein oligomerization GO:0032460
Any process that stops, prevents, or reduces the frequency, rate or extent of protein oligomerization.
1 P02768 (/IDA)
High-density lipoprotein particle remodeling GO:0034375
The acquisition, loss or modification of a protein or lipid within a high-density lipoprotein particle, including the hydrolysis of triglyceride by hepatic lipase, with the subsequent loss of free fatty acid, and the transfer of cholesterol esters from LDL to a triglyceride-rich lipoprotein particle by cholesteryl ester transfer protein (CETP), with the simultaneous transfer of triglyceride to LDL.
1 P02768 (/TAS)
Vasodilation GO:0042311
An increase in the internal diameter of blood vessels, especially arterioles or capillaries, due to relaxation of smooth muscle cells that line the vessels, and usually resulting in a decrease in blood pressure.
1 P02770 (/NAS)
Negative regulation of apoptotic process GO:0043066
Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
1 P02768 (/IDA)
Negative regulation of programmed cell death GO:0043069
Any process that stops, prevents, or reduces the frequency, rate or extent of programmed cell death, cell death resulting from activation of endogenous cellular processes.
1 P02768 (/NAS)
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.
1 P02768 (/TAS)
Cellular protein metabolic process GO:0044267
The chemical reactions and pathways involving a specific protein, rather than of proteins in general, occurring at the level of an individual cell. Includes cellular protein modification.
1 P02768 (/TAS)
Positive regulation of circadian sleep/wake cycle, non-REM sleep GO:0046010
Any process that activates or increases the duration or quality of non-rapid eye movement (NREM) sleep.
1 P02770 (/IDA)
Response to mercury ion GO:0046689
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 mercury ion stimulus.
1 P02770 (/IEP)
Maintenance of mitochondrion location GO:0051659
Any process in which a mitochondrion is maintained in a specific location within a cell and prevented from moving elsewhere.
1 P02768 (/IDA)
Response to platinum ion GO:0070541
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 platinum stimulus.
1 P02770 (/IEP)

There are 24 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
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.
12 O35090 (/ISS) P02769 (/ISS) P02770 (/ISS) P07724 (/ISS) P07724 (/ISS) P08835 (/ISS) P35747 (/ISS) P49064 (/ISS) P49065 (/ISS) P49822 (/ISS)
(2 more)
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.
5 P02768 (/IDA) P02770 (/IDA) P07724 (/IDA) P07724 (/IDA) P08835 (/IDA)
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.
2 P07724 (/IDA) P07724 (/IDA)
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.
2 P02768 (/TAS) P02769 (/TAS)
Basement membrane GO:0005604
A collagen-containing extracellular matrix consisting of a thin layer of dense material found in various animal tissues interposed between the cells and the adjacent connective tissue. It consists of the basal lamina plus an associated layer of reticulin fibers.
2 P07724 (/ISO) P07724 (/ISO)
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.
2 P07724 (/ISO) P07724 (/ISO)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
2 P07724 (/IDA) P07724 (/IDA)
Endoplasmic reticulum GO:0005783
The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
2 A0A0C4DGB6 (/IDA) P02768 (/IDA)
Endoplasmic reticulum GO:0005783
The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
2 P07724 (/ISO) P07724 (/ISO)
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.
2 A0A0C4DGB6 (/IDA) P02768 (/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.
2 P07724 (/ISO) P07724 (/ISO)
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.
2 P07724 (/ISO) P07724 (/ISO)
Myelin sheath GO:0043209
An electrically insulating fatty layer that surrounds the axons of many neurons. It is an outgrowth of glial cells: Schwann cells supply the myelin for peripheral neurons while oligodendrocytes supply it to those of the central nervous system.
2 P07724 (/HDA) P07724 (/HDA)
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.
2 P07724 (/ISO) P07724 (/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 P02768 (/NAS)
Basement membrane GO:0005604
A collagen-containing extracellular matrix consisting of a thin layer of dense material found in various animal tissues interposed between the cells and the adjacent connective tissue. It consists of the basal lamina plus an associated layer of reticulin fibers.
1 P02770 (/IDA)
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 P02768 (/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 P02768 (/HDA)
Endoplasmic reticulum lumen GO:0005788
The volume enclosed by the membranes of the endoplasmic reticulum.
1 P02768 (/TAS)
Platelet alpha granule lumen GO:0031093
The volume enclosed by the membrane of the platelet alpha granule.
1 P02768 (/TAS)
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 P02768 (/IDA)
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.
1 P02768 (/HDA)
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.
1 P02768 (/IDA)
Blood microparticle GO:0072562
A phospholipid microvesicle that is derived from any of several cell types, such as platelets, blood cells, endothelial cells, or others, and contains membrane receptors as well as other proteins characteristic of the parental cell. Microparticles are heterogeneous in size, and are characterized as microvesicles free of nucleic acids.
1 P02768 (/HDA)
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