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:

"
ABC transporter type 1, transmembrane domain
".

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: Antigen peptide transporter 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 28 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
Tapasin binding GO:0046980
Interacting selectively and non-covalently with tapasin, a member of the MHC class I loading complex which bridges the TAP peptide transporter to class I molecules.
15 P36371 (/ISS) P36371 (/ISS) Q03519 (/ISS) Q03519 (/ISS) Q28435 (/ISS) Q28436 (/ISS) Q28437 (/ISS) Q28438 (/ISS) Q61227 (/ISS) Q61229 (/ISS)
(5 more)
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 P36371 (/IPI) P36371 (/IPI) P36372 (/IPI) P36372 (/IPI) Q03519 (/IPI) Q03519 (/IPI)
TAP1 binding GO:0046978
Interacting selectively and non-covalently with the TAP1 subunit of TAP (transporter associated with antigen processing) protein.
6 P36371 (/IPI) P36371 (/IPI) P36372 (/IPI) P36372 (/IPI) Q03519 (/IPI) Q03519 (/IPI)
ATP binding GO:0005524
Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
4 P36372 (/IDA) P36372 (/IDA) Q03519 (/IDA) Q03519 (/IDA)
ATP binding GO:0005524
Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
4 P36372 (/IMP) P36372 (/IMP) Q03519 (/IMP) Q03519 (/IMP)
Nucleotide binding GO:0000166
Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
2 P36372 (/IDA) P36372 (/IDA)
Nucleotide binding GO:0000166
Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
2 P36371 (/ISO) P36371 (/ISO)
ATP binding GO:0005524
Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
2 P36371 (/ISO) P36371 (/ISO)
ATPase-coupled peptide antigen transmembrane transporter activity GO:0015433
Catalysis of the reaction: peptide antigen(in) + ATP = peptide antigen(out) + ADP + phosphate.
2 Q03519 (/IMP) Q03519 (/IMP)
ATPase-coupled peptide antigen transmembrane transporter activity GO:0015433
Catalysis of the reaction: peptide antigen(in) + ATP = peptide antigen(out) + ADP + phosphate.
2 P36371 (/ISO) P36371 (/ISO)
ATPase-coupled peptide antigen transmembrane transporter activity GO:0015433
Catalysis of the reaction: peptide antigen(in) + ATP = peptide antigen(out) + ADP + phosphate.
2 P36372 (/TAS) P36372 (/TAS)
MHC class Ib protein binding GO:0023029
Interacting selectively and non-covalently with major histocompatibility complex class Ib molecules.
2 Q03519 (/IPI) Q03519 (/IPI)
MHC class Ib protein binding GO:0023029
Interacting selectively and non-covalently with major histocompatibility complex class Ib molecules.
2 P36371 (/ISO) P36371 (/ISO)
MHC class I protein binding GO:0042288
Interacting selectively and non-covalently with major histocompatibility complex class I molecules; a set of molecules displayed on cell surfaces that are responsible for lymphocyte recognition and antigen presentation.
2 P36372 (/IDA) P36372 (/IDA)
MHC class I protein binding GO:0042288
Interacting selectively and non-covalently with major histocompatibility complex class I molecules; a set of molecules displayed on cell surfaces that are responsible for lymphocyte recognition and antigen presentation.
2 P36371 (/ISO) P36371 (/ISO)
Protein homodimerization activity GO:0042803
Interacting selectively and non-covalently with an identical protein to form a homodimer.
2 P36372 (/IDA) P36372 (/IDA)
Protein homodimerization activity GO:0042803
Interacting selectively and non-covalently with an identical protein to form a homodimer.
2 P36372 (/IPI) P36372 (/IPI)
Protein homodimerization activity GO:0042803
Interacting selectively and non-covalently with an identical protein to form a homodimer.
2 P36371 (/ISO) P36371 (/ISO)
ADP binding GO:0043531
Interacting selectively and non-covalently with ADP, adenosine 5'-diphosphate.
2 P36372 (/IDA) P36372 (/IDA)
ADP binding GO:0043531
Interacting selectively and non-covalently with ADP, adenosine 5'-diphosphate.
2 P36371 (/ISO) P36371 (/ISO)
TAP1 binding GO:0046978
Interacting selectively and non-covalently with the TAP1 subunit of TAP (transporter associated with antigen processing) protein.
2 P36371 (/ISO) P36371 (/ISO)
TAP2 binding GO:0046979
Interacting selectively and non-covalently with the TAP2 subunit of TAP (transporter associated with antigen processing) protein.
2 P36372 (/IPI) P36372 (/IPI)
TAP2 binding GO:0046979
Interacting selectively and non-covalently with the TAP2 subunit of TAP (transporter associated with antigen processing) protein.
2 P36371 (/ISO) P36371 (/ISO)
Tapasin binding GO:0046980
Interacting selectively and non-covalently with tapasin, a member of the MHC class I loading complex which bridges the TAP peptide transporter to class I molecules.
2 P36372 (/IDA) P36372 (/IDA)
Tapasin binding GO:0046980
Interacting selectively and non-covalently with tapasin, a member of the MHC class I loading complex which bridges the TAP peptide transporter to class I molecules.
2 P36372 (/IPI) P36372 (/IPI)
Tapasin binding GO:0046980
Interacting selectively and non-covalently with tapasin, a member of the MHC class I loading complex which bridges the TAP peptide transporter to class I molecules.
2 P36371 (/ISO) P36371 (/ISO)
Protein heterodimerization activity GO:0046982
Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
2 P36372 (/IDA) P36372 (/IDA)
Protein heterodimerization activity GO:0046982
Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
2 P36371 (/ISO) P36371 (/ISO)

There are 30 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
Positive regulation of T cell mediated cytotoxicity GO:0001916
Any process that activates or increases the frequency, rate or extent of T cell mediated cytotoxicity.
4 P36371 (/IDA) P36371 (/IDA) P36372 (/IDA) P36372 (/IDA)
Antigen processing and presentation of endogenous peptide antigen via MHC class I GO:0019885
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class I protein complex. The peptide antigen is typically, but not always, processed from a whole protein. Class I here refers to classical class I molecules.
4 P36372 (/IDA) P36372 (/IDA) Q03519 (/IDA) Q03519 (/IDA)
Positive regulation of T cell mediated cytotoxicity GO:0001916
Any process that activates or increases the frequency, rate or extent of T cell mediated cytotoxicity.
2 P36371 (/IMP) P36371 (/IMP)
Positive regulation of T cell mediated cytotoxicity GO:0001916
Any process that activates or increases the frequency, rate or extent of T cell mediated cytotoxicity.
2 P36371 (/ISO) P36371 (/ISO)
Response to molecule of bacterial origin GO:0002237
Any process that results in a change in state or activity of an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus by molecules of bacterial origin such as peptides derived from bacterial flagellin.
2 P36371 (/IMP) P36371 (/IMP)
Antigen processing and presentation of peptide antigen via MHC class I GO:0002474
The process in which an antigen-presenting cell expresses a peptide antigen on its cell surface in association with an MHC class I protein complex. Class I here refers to classical class I molecules.
2 Q03519 (/TAS) Q03519 (/TAS)
Antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent GO:0002479
The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class I protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger exogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class I molecule. Class I here refers to classical class I molecules.
2 Q03519 (/TAS) Q03519 (/TAS)
Antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent GO:0002481
The process in which an antigen-presenting cell expresses a peptide antigen of exogenous origin on its cell surface in association with an MHC class Ib protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger exogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class Ib molecule. Class Ib here refers to non-classical class I molecules, such as those of the HLA-E gene family.
2 P36371 (/IMP) P36371 (/IMP)
Antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent GO:0002485
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class I protein complex following intracellular transport via a TAP-dependent ER pathway. The peptide is typically a fragment of a larger endogenous protein which has been degraded within the cell and becomes associated with the MHC class I molecule in the ER following TAP-dependent transport from the cytosol. Class I here refers to classical class I molecules.
2 P36371 (/IDA) P36371 (/IDA)
Antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent GO:0002489
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class Ib protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger endogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class Ib molecule. Class Ib here refers to non-classical class I molecules, such as those of the HLA-E gene family.
2 P36371 (/IDA) P36371 (/IDA)
Antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent GO:0002489
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class Ib protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger endogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class Ib molecule. Class Ib here refers to non-classical class I molecules, such as those of the HLA-E gene family.
2 Q03519 (/IMP) Q03519 (/IMP)
Antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent GO:0002489
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class Ib protein complex following intracellular transport via a TAP (transporter associated with antigen processing) pathway. The peptide is typically a fragment of a larger endogenous protein which has been degraded within the cell and is dependent on TAP transport from the cytosol to ER for association with the MHC class Ib molecule. Class Ib here refers to non-classical class I molecules, such as those of the HLA-E gene family.
2 P36371 (/ISO) P36371 (/ISO)
Positive regulation of antigen processing and presentation of peptide antigen via MHC class I GO:0002591
Any process that activates or increases the frequency, rate, or extent of antigen processing and presentation of peptide antigen via MHC class I.
2 P36372 (/IMP) P36372 (/IMP)
Positive regulation of antigen processing and presentation of peptide antigen via MHC class I GO:0002591
Any process that activates or increases the frequency, rate, or extent of antigen processing and presentation of peptide antigen via MHC class I.
2 P36371 (/ISO) P36371 (/ISO)
Peptide transport GO:0015833
The directed movement of peptides, compounds of two or more amino acids where the alpha carboxyl group of one is bound to the alpha amino group of another, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
2 P36372 (/IMP) P36372 (/IMP)
Peptide transport GO:0015833
The directed movement of peptides, compounds of two or more amino acids where the alpha carboxyl group of one is bound to the alpha amino group of another, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
2 P36371 (/ISO) P36371 (/ISO)
Antigen processing and presentation of endogenous peptide antigen via MHC class I GO:0019885
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class I protein complex. The peptide antigen is typically, but not always, processed from a whole protein. Class I here refers to classical class I molecules.
2 Q03519 (/IMP) Q03519 (/IMP)
Antigen processing and presentation of endogenous peptide antigen via MHC class I GO:0019885
The process in which an antigen-presenting cell expresses a peptide antigen of endogenous origin on its cell surface in association with an MHC class I protein complex. The peptide antigen is typically, but not always, processed from a whole protein. Class I here refers to classical class I molecules.
2 P36371 (/ISO) P36371 (/ISO)
Protection from natural killer cell mediated cytotoxicity GO:0042270
The process of protecting a cell from natural killer cell mediated cytotoxicity.
2 P36372 (/IMP) P36372 (/IMP)
Protection from natural killer cell mediated cytotoxicity GO:0042270
The process of protecting a cell from natural killer cell mediated cytotoxicity.
2 P36371 (/ISO) P36371 (/ISO)
Response to cadmium ion GO:0046686
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 cadmium (Cd) ion stimulus.
2 Q1LWX8 (/IEP) Q801W2 (/IEP)
Cytosol to endoplasmic reticulum transport GO:0046967
The directed movement of substances from the cytosol to the endoplasmic reticulum of a cell.
2 Q03519 (/IMP) Q03519 (/IMP)
Cytosol to endoplasmic reticulum transport GO:0046967
The directed movement of substances from the cytosol to the endoplasmic reticulum of a cell.
2 P36371 (/ISO) P36371 (/ISO)
Peptide antigen transport GO:0046968
The directed movement of a peptide antigen into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. The peptide antigen is typically, but not always, processed from an endogenous or exogenous protein.
2 Q03519 (/IDA) Q03519 (/IDA)
Peptide antigen transport GO:0046968
The directed movement of a peptide antigen into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. The peptide antigen is typically, but not always, processed from an endogenous or exogenous protein.
2 Q03519 (/IMP) Q03519 (/IMP)
Peptide antigen transport GO:0046968
The directed movement of a peptide antigen into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. The peptide antigen is typically, but not always, processed from an endogenous or exogenous protein.
2 P36371 (/ISO) P36371 (/ISO)
Peptide antigen transport GO:0046968
The directed movement of a peptide antigen into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. The peptide antigen is typically, but not always, processed from an endogenous or exogenous protein.
2 P36372 (/TAS) P36372 (/TAS)
Protein-containing complex assembly GO:0065003
The aggregation, arrangement and bonding together of a set of macromolecules to form a protein-containing complex.
2 P36372 (/IDA) P36372 (/IDA)
Protein-containing complex assembly GO:0065003
The aggregation, arrangement and bonding together of a set of macromolecules to form a protein-containing complex.
2 P36371 (/ISO) P36371 (/ISO)
Vesicle fusion with endoplasmic reticulum-Golgi intermediate compartment (ERGIC) membrane GO:1990668
The joining of the lipid bilayer membrane around a vesicle to the lipid bilayer membrane of the ERGIC. This can involve anterograde or retrograde transport vesicles.
2 Q03519 (/TAS) Q03519 (/TAS)

There are 18 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
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).
7 A0A087WYD6 (/IDA) E7ENX8 (/IDA) Q03519 (/IDA) Q03519 (/IDA) Q5JNW1 (/IDA) Q5JNW1 (/IDA) Q9UP03 (/IDA)
Nuclear speck GO:0016607
A discrete extra-nucleolar subnuclear domain, 20-50 in number, in which splicing factors are seen to be localized by immunofluorescence microscopy.
7 A0A087WYD6 (/IDA) E7ENX8 (/IDA) Q03519 (/IDA) Q03519 (/IDA) Q5JNW1 (/IDA) Q5JNW1 (/IDA) Q9UP03 (/IDA)
MHC class I peptide loading complex GO:0042824
A large, multisubunit complex which consists of the MHC class I-beta 2 microglobulin dimer, the transporter associated with antigen presentation (TAP), tapasin (an MHC-encoded membrane protein), the chaperone calreticulin and the thiol oxidoreductase ERp57. Functions in the assembly of peptides with newly synthesized MHC class I molecules.
4 P36372 (/IDA) P36372 (/IDA) Q03519 (/IDA) Q03519 (/IDA)
TAP complex GO:0042825
A heterodimer composed of the subunits TAP1 and TAP2 (transporter associated with antigen presentation). Functions in the transport of antigenic peptides from the cytosol to the lumen of the endoplasmic reticulum.
4 P36372 (/IDA) P36372 (/IDA) Q03519 (/IDA) Q03519 (/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 P36371 (/ISO) P36371 (/ISO)
Endoplasmic reticulum membrane GO:0005789
The lipid bilayer surrounding the endoplasmic reticulum.
2 Q03519 (/TAS) Q03519 (/TAS)
Membrane GO:0016020
A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
2 Q03519 (/HDA) Q03519 (/HDA)
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 Q03519 (/IDA) Q03519 (/IDA)
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 P36371 (/ISO) P36371 (/ISO)
Nuclear speck GO:0016607
A discrete extra-nucleolar subnuclear domain, 20-50 in number, in which splicing factors are seen to be localized by immunofluorescence microscopy.
2 P36371 (/ISO) P36371 (/ISO)
Integral component of endoplasmic reticulum membrane GO:0030176
The component of the endoplasmic reticulum 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 Q03519 (/IDA) Q03519 (/IDA)
Integral component of endoplasmic reticulum membrane GO:0030176
The component of the endoplasmic reticulum 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 P36371 (/ISO) P36371 (/ISO)
Phagocytic vesicle membrane GO:0030670
The lipid bilayer surrounding a phagocytic vesicle.
2 Q03519 (/TAS) Q03519 (/TAS)
Endoplasmic reticulum-Golgi intermediate compartment membrane GO:0033116
The lipid bilayer surrounding any of the compartments of the endoplasmic reticulum (ER)-Golgi intermediate compartment system.
2 Q03519 (/TAS) Q03519 (/TAS)
MHC class I peptide loading complex GO:0042824
A large, multisubunit complex which consists of the MHC class I-beta 2 microglobulin dimer, the transporter associated with antigen presentation (TAP), tapasin (an MHC-encoded membrane protein), the chaperone calreticulin and the thiol oxidoreductase ERp57. Functions in the assembly of peptides with newly synthesized MHC class I molecules.
2 P36371 (/ISO) P36371 (/ISO)
TAP complex GO:0042825
A heterodimer composed of the subunits TAP1 and TAP2 (transporter associated with antigen presentation). Functions in the transport of antigenic peptides from the cytosol to the lumen of the endoplasmic reticulum.
2 P36371 (/ISO) P36371 (/ISO)
Intracellular membrane-bounded organelle GO:0043231
Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane and occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane.
2 P36372 (/IDA) P36372 (/IDA)
Intracellular membrane-bounded organelle GO:0043231
Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane and occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane.
2 P36371 (/ISO) P36371 (/ISO)
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