| GOID Link to GO |
Functional Category | Description | Protein Count link to protein list |
|---|---|---|---|
| GO:0044459 | plasma membrane part | Any constituent part of the plasma membrane, the membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins. | 277 |
| GO:0016324 | apical plasma membrane | The region of the plasma membrane located at the apical end of the cell. | 251 |
| GO:0005887 | integral to plasma membrane | Penetrating at least one phospholipid bilayer of a plasma membrane. May also refer to the state of being buried in the bilayer with no exposure outside the bilayer. | 226 |
| GO:0016323 | basolateral plasma membrane | 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. | 157 |
| GO:0042383 | sarcolemma | The outer membrane of a muscle cell, consisting of the plasma membrane, a covering basement membrane (about 100 nm thick and sometimes common to more than one fiber), and the associated loose network of collagen fibers. | 93 |
| GO:0009897 | external side of plasma membrane | The side of the plasma membrane that is opposite to the side that faces the cytoplasm. | 87 |
| GO:0016328 | lateral plasma membrane | The membranes on the sides of epithelial cells which lie at the interface of adjacent cells. | 65 |
| GO:0001891 | phagocytic cup | An invagination of the cell membrane formed by an actin dependent process during phagocytosis. Following internalization it is converted into a phagosome. | 62 |
| GO:0030315 | T-tubule | Invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril. The ends of T-tubules make contact with the sarcoplasmic reticulum membrane. | 53 |
| GO:0005901 | caveola | A membrane raft that forms small pit, depression, or invagination that communicates with the outside of a cell and extends inward, indenting the cytoplasm and the cell membrane. Examples include any of the minute pits or incuppings of the cell membrane formed during pinocytosis. Such caveolae may be pinched off to form free vesicles within the cytoplasm. | 53 |
| GO:0009898 | internal side of plasma membrane | The side of the plasma membrane that faces the cytoplasm. | 50 |
| GO:0019897 | extrinsic to plasma membrane | Loosely bound to one surface of the plasma membrane, but not integrated into the hydrophobic region. | 40 |
| GO:0031526 | brush border membrane | The portion of the plasma membrane surrounding the brush border. | 39 |
| GO:0030673 | axolemma | The portion of the plasma membrane surrounding an axon; it is a specialized trilaminar random mosaic of protein molecules floating within a fluid matrix of highly mobile phospholipid molecules, 7-8 nm in thickness. | 36 |
| GO:0032590 | dendrite membrane | The portion of the plasma membrane surrounding a dendrite. | 32 |
| GO:0005834 | heterotrimeric G-protein complex | Any of a family of heterotrimeric GTP-binding and hydrolyzing proteins; they belong to a superfamily of GTPases that includes monomeric proteins such as EF-Tu and RAS. Heterotrimeric G-proteins consist of three subunits; the alpha subunit contains the guanine nucleotide binding site and possesses GTPase activity; the beta and gamma subunits are tightly associated and function as a beta-gamma heterodimer; extrinsic plasma membrane proteins (cytoplasmic face) that function as a complex to transduce signals from G-protein coupled receptors to an effector protein. | 32 |
| GO:0001772 | immunological synapse | An area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell formed through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and the target cell and facilitating activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction. | 32 |
| GO:0032587 | ruffle membrane | The portion of the plasma membrane surrounding a ruffle. | 30 |
| GO:0031253 | cell projection membrane | The portion of the plasma membrane surrounding a cell surface projection. | 30 |
| GO:0016327 | apicolateral plasma membrane | The apical end of the lateral plasma membrane of epithelial cells. | 25 |
| GO:0009925 | basal plasma membrane | The region of the plasma membrane located at the basal end 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. | 22 |
| GO:0032809 | neuronal cell body membrane | The plasma membrane of a neuron cell body - excludes the plasma membrane of cell projections such as axons and dendrites. | 22 |
| GO:0031234 | extrinsic to internal side of plasma membrane | Loosely bound to the surface of the plasma membrane that faces the cytoplasm, but not integrated into the hydrophobic region. | 21 |
| GO:0008076 | voltage-gated potassium channel complex | A protein complex that forms a transmembrane channel through which potassium ions may cross a cell membrane in response to changes in membrane potential. | 21 |
| GO:0031226 | intrinsic to plasma membrane | Located in the plasma membrane such that some covalently attached portion of the gene product, for example part of a peptide sequence or some other covalently attached group such as a GPI anchor, spans or is embedded in one or both leaflets of the membrane. | 20 |
| GO:0008305 | integrin complex | A protein complex that is composed of one alpha subunit and one beta subunit, both of which are members of the integrin superfamily of cell adhesion receptors; the complex spans the plasma membrane and binds to extracellular matrix ligands, cell-surface ligands, and soluble ligands. | 16 |
| GO:0036128 | CatSper complex | A sperm-specific voltage-gated calcium channel that controls the intracellular calcium ion concentration and, thereby, the swimming behavior of sperm. Consists of a heteromeric tetramer surrounding a calcium ion- selective pore. May also contain additional auxiliary subunits. | 16 |
| GO:0033181 | plasma membrane proton-transporting V-type ATPase complex | A proton-transporting two-sector ATPase complex found in the plasma membrane. | 16 |
| GO:0046658 | anchored to plasma membrane | Tethered to the plasma membrane by a covalently attached anchor, such as a lipid group, that is embedded in the membrane. When used to describe a protein, indicates that the peptide sequence does not span the membrane. | 16 |
| GO:0035003 | subapical complex | The most apical region of the lateral plasma membrane of an invertebrate epithelial cell. The subapical complex lies above the zonula adherens and the septate junction, and is comparable to the position of the tight junction of vertebrate cells. | 15 |
| GO:0031527 | filopodium membrane | The portion of the plasma membrane surrounding a filopodium. | 15 |
| GO:0005892 | acetylcholine-gated channel complex | A homo- or hetero-pentameric protein complex that forms a transmembrane channel through which ions may pass in response to acetylcholine binding. | 15 |
| GO:0042622 | photoreceptor outer segment membrane | The membrane surrounding the outer segment of a vertebrate photoreceptor. | 15 |
| GO:0005891 | voltage-gated calcium channel complex | A protein complex that forms a transmembrane channel through which calcium ions may pass in response to changes in membrane potential. | 15 |
| GO:0060170 | cilium membrane | The portion of the plasma membrane surrounding a cilium. | 13 |
| GO:0097203 | phagocytic cup lip | The tip or margin of the progressing circular lamella that engulfs a particle during phagocytosis. When the two lips of the cup fuse it is converted into a phagosome. | 11 |
| GO:0031528 | microvillus membrane | The portion of the plasma membrane surrounding a microvillus. | 10 |
| GO:0005890 | sodium:potassium-exchanging ATPase complex | Sodium:potassium-exchanging ATPases are tetrameric proteins, consisting of two large alpha subunits and two smaller beta subunits. The alpha subunits bear the active site and penetrate the membrane, while the beta subunits carry oligosaccharide groups and face the cell exterior. | 10 |
| GO:0030122 | AP-2 adaptor complex | A heterotetrameric AP-type membrane coat adaptor complex that consists of alpha, beta2, mu2 and sigma2 subunits, and links clathrin to the membrane surface of a vesicle; vesicles with AP-2-containing coats are normally found primarily near the plasma membrane, on endocytic vesicles. In at least humans, the AP-2 complex can be heterogeneric due to the existence of multiple subunit isoforms encoded by different alpha genes (alphaA and alphaC). | 10 |
| GO:0017146 | N-methyl-D-aspartate selective glutamate receptor complex | An assembly of four or five subunits which form a structure with an extracellular N-terminus and a large loop that together form the ligand binding domain. The C-terminus is intracellular. The ionotropic glutamate receptor complex itself acts as a ligand gated ion channel; on binding glutamate, charged ions pass through a channel in the center of the receptor complex. NMDA receptors are composed of assemblies of NR1 subunits (Figure 3) and NR2 subunits, which can be one of four separate gene products (NR2A-D). Expression of both subunits are required to form functional channels. The glutamate binding domain is formed at the junction of NR1 and NR2 subunits. NMDA receptors are permeable to calcium ions as well as being permeable to other ions. Thus NMDA receptor activation leads to a calcium influx into the post-synaptic cells, a signal thought to be crucial for the induction of NMDA-receptor dependent LTP and LTD. | 10 |
| GO:0031256 | leading edge membrane | The portion of the plasma membrane surrounding the leading edge of a motile cell. | 9 |
| GO:0045262 | plasma membrane proton-transporting ATP synthase complex, catalytic core F(1) | The catalytic sector of the plasma membrane hydrogen-transporting ATP synthase; it comprises the catalytic core and central stalk, and is peripherally associated with the plasma membrane when the entire ATP synthase is assembled. Examples of this component are found in Bacterial species. | 9 |
| GO:0032281 | alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid selective glutamate receptor complex | An assembly of four or five subunits which form a structure with an extracellular N-terminus and a large loop that together form the ligand binding domain. The C-terminus is intracellular. The ionotropic glutamate receptor complex itself acts as a ligand gated ion channel; on binding glutamate, charged ions pass through a channel in the center of the receptor complex. The AMPA receptors mediate fast synaptic transmission in the CNS and are composed of subunits GluR1-4, products from separate genes. These subunits have an extracellular N-terminus and an intracellular C-terminus. | 8 |
| GO:0008328 | ionotropic glutamate receptor complex | A multimeric assembly of four or five subunits which form a structure with an extracellular N-terminus and a large loop that together form the ligand binding domain. The C-terminus is intracellular. The ionotropic glutamate receptor complex itself acts as a ligand-gated ion channel; on binding glutamate, charged ions pass through a channel in the center of the receptor complex. | 8 |
| GO:0032591 | dendritic spine membrane | The portion of the plasma membrane surrounding a dendritic spine. | 7 |
| GO:0016027 | inaD signaling complex | A complex of proteins that are involved in phototransduction and attached to the transient receptor potential (TRP) channel. The protein connections are mediated through inaD. | 7 |
| GO:0016010 | dystrophin-associated glycoprotein complex | A multiprotein complex that forms a strong mechanical link between the cytoskeleton and extracellular matrix; typical of, but not confined to, muscle cells. The complex is composed of transmembrane, cytoplasmic, and extracellular proteins, including dystrophin, sarcoglycans, dystroglycan, dystrobrevins, syntrophins, sarcospan, caveolin-3, and NO synthase. | 7 |
| GO:0097025 | MPP7-DLG1-LIN7 complex | A heterotrimeric protein complex formed by the association of MMP7, DLG1 and either LIN7A or LIN7C; regulates the stability and localization of DLG1 to cell junctions. | 6 |
| GO:0000148 | 1,3-beta-D-glucan synthase complex | A protein complex that catalyzes the transfer of a glucose group from UDP-glucose to a (1->3)-beta-D-glucan chain. | 6 |
| GO:0032589 | neuron projection membrane | The portion of the plasma membrane surrounding a neuron projection. | 6 |
| GO:0005899 | insulin receptor complex | A disulfide-bonded, heterotetrameric receptor complex. The alpha chains are entirely extracellular, while each beta chain has one transmembrane domain. The ligand binds to the alpha subunit extracellular domain and the kinase is associated with the beta subunit intracellular domain. | 4 |
| GO:0070436 | Grb2-EGFR complex | A protein complex that contains the epidermal growth factor receptor (EGFR) and Grb2, and is involved in linking EGFR activation to the p21-Ras pathway. | 4 |
| GO:0035631 | CD40 receptor complex | A protein complex that contains at least CD40 (a cell surface receptor of the tumour necrosis factor receptor (TNFR) superfamily), and other signaling molecules. | 4 |
| GO:0048179 | activin receptor complex | A protein complex that acts as an activin receptor. Heterodimeric activin receptors, comprising one Type I activin receptor and one Type II receptor polypeptide, and heterotrimeric receptors have been observed. | 4 |
| GO:0016600 | flotillin complex | A protein complex that contains flotillin-1 and flotillin-2, and may contain associated proteins. Flotillins associate into membrane microdomains resembling caveolae. | 4 |
| GO:0044298 | cell body membrane | The plasma membrane of a cell that bears surface projections such as axons, dendrites, cilia, or flagella, excluding the plasma membrane on cell projections. | 4 |
| GO:0031235 | intrinsic to internal side of plasma membrane | Located in the plasma membrane such that some covalently attached portion of the gene product, for example part of a peptide sequence or some other covalently attached group such as a GPI anchor, spans or is embedded in one or both leaflets of the membrane, with the bulk of the gene product located on the side that faces the cytoplasm. | 4 |
| GO:0031520 | plasma membrane of cell tip | The portion of the plasma membrane surrounding the cell tip. | 4 |
| GO:0035997 | rhabdomere microvillus membrane | The portion of the plasma membrane surrounding a microvillus of a rhabdomere. | 4 |
| GO:0070724 | BMP receptor complex | A protein complex that acts as a receptor for bone morphogenetic proteins (BMPs); a homo- or heterodimer of type I and/or type II BMP receptor subunits. | 4 |
| GO:0045260 | plasma membrane proton-transporting ATP synthase complex | A proton-transporting ATP synthase complex found in the plasma membrane. Examples of this component are found in Bacterial species. | 4 |
| GO:0001518 | voltage-gated sodium channel complex | A sodium channel in a cell membrane whose opening is governed by the membrane potential. | 3 |
| GO:0032983 | kainate selective glutamate receptor complex | An assembly of four or five subunits which form a structure with an extracellular N-terminus and a large loop that together form the ligand binding domain. The C-terminus is intracellular. The ionotropic glutamate receptor complex itself acts as a ligand gated ion channel; on binding glutamate, charged ions pass through a channel in the center of the receptor complex. Kainate receptors are multimeric assemblies of GluR5-7 and KA-1/2 subunits. | 3 |
| GO:0034666 | alpha2-beta1 integrin complex | An integrin complex that comprises one alpha2 subunit and one beta1 subunit. | 3 |
| GO:0042101 | T cell receptor complex | A protein complex that contains a disulfide-linked heterodimer of T cell receptor (TCR) chains, which are members of the immunoglobulin superfamily, and mediates antigen recognition, ultimately resulting in T cell activation. The TCR heterodimer is associated with the CD3 complex, which consists of the nonpolymorphic polypeptides gamma, delta, epsilon, zeta, and, in some cases, eta (an RNA splice variant of zeta) or Fc epsilon chains. | 3 |
| GO:0016342 | catenin complex | Complex of peripheral cytoplasmic proteins (alpha-, beta- and gamma-catenin) that interact with the cytoplasmic region of uvomorulin/E-cadherin to connect it to the actin cytoskeleton. | 3 |
| GO:0030132 | clathrin coat of coated pit | The coat found on coated pits and the coated vesicles derived from coated pits; comprises clathrin and the AP-2 adaptor complex. | 3 |
| GO:0070765 | gamma-secretase complex | A protein complex that has aspartic-type endopeptidase activity, and contains a catalytic subunit, presenilin (PS), that is a prototypical member of the GxGD-type aspartyl peptidases. The complex also contains additional subunits, including nicastrin, APH-1, PEN-2, and a regulatory subunit, CD147. Gamma-secretase cleaves several transmembrane proteins including the cell surface receptor Notch and the beta-amyloid precursor protein. | 2 |
| GO:0002095 | caveolar macromolecular signaling complex | A complex composed of proteins required for beta adrenergic receptor activation of protein kinase A. It includes the Cav 12. subunit of L-type calcium channel, protein kinase A regulatory subunit 2(PKAR2), adenyl cyclase, beta-adrenergic receptor, G-alpha-S, protein phosphatase 2A (PP2A) and caveolin 3 (CAV3). | 2 |
| GO:0031233 | intrinsic to external side of plasma membrane | Located in the plasma membrane such that some covalently attached portion of the gene product, for example part of a peptide sequence or some other covalently attached group such as a GPI anchor, spans or is embedded in one or both leaflets of the membrane, with the bulk of the gene product located on the side opposite to the side that faces the cytoplasm. | 2 |
| GO:0045282 | plasma membrane succinate dehydrogenase complex | A multimeric complex which consists of flavoprotein (subunit A ; InterPro:IPR003952), iron-sulfur protein (subunit B) and membrane-bound cytochrome b560 (subunit C; InterPro:IPR000701). In some Archaea, the membrane-bound subunits (C or C and D) do not necessarily contain heme. Membrane-bound subunits can bind/react with quinones. Examples of this component are found in Bacterial species. | 2 |
| GO:0046691 | intracellular canaliculus | An apical plasma membrane part that forms a narrow enfolded luminal membrane channel, lined with numerous microvilli, that appears to extend into the cytoplasm of the cell. A specialized network of intracellular canaliculi is a characteristic feature of parietal cells of the gastric mucosa in vertebrates. | 2 |
| GO:0042105 | alpha-beta T cell receptor complex | A T cell receptor complex in which the TCR heterodimer comprises alpha and beta chains, associated with the CD3 complex; recognizes a complex consisting of an antigen-derived peptide bound to a class I or class II MHC protein. | 2 |
| GO:0031232 | extrinsic to external side of plasma membrane | Loosely bound to the surface of the plasma membrane that faces away from the cytoplasm, but not integrated into the hydrophobic region. | 2 |
| GO:0036195 | muscle cell projection membrane | The portion of the plasma membrane surrounding a muscle cell projection. | 2 |
| GO:0019815 | B cell receptor complex | An immunoglobulin complex that is present in the plasma membrane of B cells and that in its canonical form is composed of two identical immunoglobulin heavy chains and two identical immunoglobulin light chains and a signaling subunit, a heterodimer of the Ig-alpha and Ig-beta proteins. | 1 |
| GO:0016935 | glycine-gated chloride channel complex | A protein complex that forms a transmembrane channel through which chloride ions may pass in response to glycine binding to the channel complex or one of its constituent parts. | 1 |
| GO:0071575 | integral to external side of plasma membrane | Penetrating at least one phospholipid bilayer of the plasma membrane, with the bulk of the gene product located on the side opposite to the side that faces the cytoplasm. | 1 |
| GO:0045323 | interleukin-1 receptor complex | A protein complex that binds interleukin-1; comprises an alpha and a beta subunit. | 1 |
| GO:0031258 | lamellipodium membrane | The portion of the plasma membrane surrounding a lamellipodium. | 1 |
| GO:0005889 | hydrogen:potassium-exchanging ATPase complex | A protein complex that possesses hydrogen:potassium-exchanging ATPase activity; characterized in animal cells, where it maintains ionic gradients of Na+ and K+ at the expense of ATP hydrolysis; The complex contains two obligatory subunits, the catalytic alpha subunit and a glycosylated beta subunit; two additional subunits, gamma and channel-inducing factor (CHIF), may also be present. | 1 |
| GO:0070435 | Shc-EGFR complex | A protein complex that contains the epidermal growth factor receptor (EGFR) and the adaptor protein Shc, and is involved in linking EGFR activation to the p21-Ras pathway. | 1 |
| GO:0034678 | alpha8-beta1 integrin complex | An integrin complex that comprises one alpha8 subunit and one beta1 subunit. | 1 |
| GO:0045264 | plasma membrane proton-transporting ATP synthase complex, coupling factor F(o) | All non-F1 subunits of the plasma membrane hydrogen-transporting ATP synthase, including integral and peripheral plasma membrane proteins. | 1 |
| GO:0034673 | inhibin-betaglycan-ActRII complex | A protein complex that consists of inhibin, type III transforming growth factor beta receptor (also known as betaglycan), and the type II activin receptor ActRII. The complex is thought to negatively regulate the activity of activin B. | 1 |