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:

"
Complement Module, domain 1
".

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 42: Membrane cofactor protein

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 7 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
Endopeptidase activity GO:0004175
Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain.
2 A0A024CBD6 (/IDA) O02839 (/IDA)
Complement binding GO:0001848
Interacting selectively and non-covalently with any component or product of the complement cascade.
1 Q9Z0M4 (/IPI)
Complement binding GO:0001848
Interacting selectively and non-covalently with any component or product of the complement cascade.
1 O88174 (/ISO)
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 P15529 (/IPI)
Signaling receptor activity GO:0038023
Receiving a signal and transmitting it in the cell to initiate a change in cell activity. A signal is a physical entity or change in state that is used to transfer information in order to trigger a response.
1 P15529 (/TAS)
Cadherin binding GO:0045296
Interacting selectively and non-covalently with cadherin, a type I membrane protein involved in cell adhesion.
1 P15529 (/IPI)
Cadherin binding GO:0045296
Interacting selectively and non-covalently with cadherin, a type I membrane protein involved in cell adhesion.
1 O88174 (/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
Proteolysis GO:0006508
The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
3 A0A024CBD6 (/IDA) O02839 (/IDA) Q9Z0M4 (/IDA)
Regulation of complement activation GO:0030449
Any process that modulates the frequency, rate or extent of complement activation.
2 P15529 (/TAS) Q9DEG0 (/TAS)
Negative regulation of complement activation, alternative pathway GO:0045957
Any process that stops, prevents, or reduces the frequency, rate or extent of complement activation by the alternative pathway.
2 A0A024CBD6 (/IDA) O02839 (/IDA)
Negative regulation of complement activation, classical pathway GO:0045959
Any process that stops, prevents, or reduces the frequency, rate or extent of complement activation by the classical pathway.
2 A0A024CBD6 (/IDA) O02839 (/IDA)
Adaptive immune response GO:0002250
An immune response mediated by cells expressing specific receptors for antigen produced through a somatic diversification process, and allowing for an enhanced secondary response to subsequent exposures to the same antigen (immunological memory).
1 P15529 (/IC)
T cell mediated immunity GO:0002456
Any process involved in the carrying out of an immune response by a T cell.
1 P15529 (/IMP)
T cell mediated immunity GO:0002456
Any process involved in the carrying out of an immune response by a T cell.
1 O88174 (/ISO)
Proteolysis GO:0006508
The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
1 O88174 (/ISO)
Regulation of Notch signaling pathway GO:0008593
Any process that modulates the frequency, rate or extent of the Notch signaling pathway.
1 P15529 (/IDA)
Regulation of Notch signaling pathway GO:0008593
Any process that modulates the frequency, rate or extent of the Notch signaling pathway.
1 O88174 (/ISO)
Positive regulation of gene expression GO:0010628
Any process that increases 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.
1 P15529 (/IMP)
Positive regulation of gene expression GO:0010628
Any process that increases 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.
1 O88174 (/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.
1 P15529 (/IDA)
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.
1 O88174 (/ISO)
Interleukin-10 production GO:0032613
The appearance of interleukin-10 due to biosynthesis or secretion following a cellular stimulus, resulting in an increase in its intracellular or extracellular levels.
1 P15529 (/IDA)
Interleukin-10 production GO:0032613
The appearance of interleukin-10 due to biosynthesis or secretion following a cellular stimulus, resulting in an increase in its intracellular or extracellular levels.
1 O88174 (/ISO)
Positive regulation of interleukin-10 production GO:0032733
Any process that activates or increases the frequency, rate, or extent of interleukin-10 production.
1 P15529 (/IDA)
Positive regulation of interleukin-10 production GO:0032733
Any process that activates or increases the frequency, rate, or extent of interleukin-10 production.
1 O88174 (/ISO)
Sequestering of extracellular ligand from receptor GO:0035581
The process of binding or confining an extracellular signaling ligand, such that the ligand is unable to bind to its cell surface receptor.
1 P15529 (/IDA)
Sequestering of extracellular ligand from receptor GO:0035581
The process of binding or confining an extracellular signaling ligand, such that the ligand is unable to bind to its cell surface receptor.
1 O88174 (/ISO)
Positive regulation of T cell proliferation GO:0042102
Any process that activates or increases the rate or extent of T cell proliferation.
1 P15529 (/IDA)
Positive regulation of T cell proliferation GO:0042102
Any process that activates or increases the rate or extent of T cell proliferation.
1 O88174 (/ISO)
Positive regulation of memory T cell differentiation GO:0043382
Any process that activates or increases the frequency, rate or extent of memory T cell differentiation.
1 P15529 (/IDA)
Positive regulation of memory T cell differentiation GO:0043382
Any process that activates or increases the frequency, rate or extent of memory T cell differentiation.
1 O88174 (/ISO)
Positive regulation of regulatory T cell differentiation GO:0045591
Any process that activates or increases the frequency, rate or extent of differentiation of regulatory T cells.
1 P15529 (/IDA)
Positive regulation of regulatory T cell differentiation GO:0045591
Any process that activates or increases the frequency, rate or extent of differentiation of regulatory T cells.
1 O88174 (/ISO)
Negative regulation of complement activation GO:0045916
Any process that stops, prevents, or reduces the frequency, rate or extent of complement activation.
1 Q9Z0M4 (/IDA)
Negative regulation of complement activation GO:0045916
Any process that stops, prevents, or reduces the frequency, rate or extent of complement activation.
1 O88174 (/ISO)
Negative regulation of cytolysis GO:0045918
Any process that stops, prevents, or reduces the frequency, rate or extent of cytolysis.
1 Q9DEG0 (/IDA)
Positive regulation of transforming growth factor beta production GO:0071636
Any process that activates or increases the frequency, rate, or extent of production of transforming growth factor-beta.
1 P15529 (/IDA)
Positive regulation of transforming growth factor beta production GO:0071636
Any process that activates or increases the frequency, rate, or extent of production of transforming growth factor-beta.
1 O88174 (/ISO)

There are 20 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
Cell surface GO:0009986
The external part of the cell wall and/or plasma membrane.
3 P15529 (/IDA) Q9DEG0 (/IDA) Q9Z0M4 (/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 P15529 (/IDA) Q9DEG0 (/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 P15529 (/TAS) Q9DEG0 (/TAS)
Integral component of membrane GO:0016021
The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
2 A0A024CBD6 (/IDA) O02839 (/IDA)
Acrosomal vesicle GO:0001669
A structure in the head of a spermatozoon that contains acid hydrolases, and is concerned with the breakdown of the outer membrane of the ovum during fertilization. It lies just beneath the plasma membrane and is derived from the lysosome.
1 Q9Z0M4 (/IDA)
Acrosomal vesicle GO:0001669
A structure in the head of a spermatozoon that contains acid hydrolases, and is concerned with the breakdown of the outer membrane of the ovum during fertilization. It lies just beneath the plasma membrane and is derived from the lysosome.
1 O88174 (/ISO)
Inner acrosomal membrane GO:0002079
The acrosomal membrane region that underlies the acrosomal vesicle and is located toward the sperm nucleus. This region is responsible for molecular interactions allowing the sperm to penetrate the zona pellucida and fuses with the egg plasma membrane.
1 Q9Z0M4 (/IDA)
Inner acrosomal membrane GO:0002079
The acrosomal membrane region that underlies the acrosomal vesicle and is located toward the sperm nucleus. This region is responsible for molecular interactions allowing the sperm to penetrate the zona pellucida and fuses with the egg plasma membrane.
1 O88174 (/ISO)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 Q9Z0M4 (/IDA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 O88174 (/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.
1 Q9Z0M4 (/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 O88174 (/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.
1 O88174 (/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.
1 P15529 (/NAS)
Integral component of plasma membrane GO:0005887
The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 P15529 (/TAS)
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.
1 P15529 (/HDA)
Cell surface GO:0009986
The external part of the cell wall and/or plasma membrane.
1 O88174 (/ISO)
Basolateral plasma membrane GO:0016323
The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis.
1 Q9Z0M4 (/IDA)
Basolateral plasma membrane GO:0016323
The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis.
1 O88174 (/ISO)
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 P15529 (/HDA)