| GOID Link to GO |
Functional Category | Description | Protein Count link to protein list |
|---|---|---|---|
| GO:0004675 | transmembrane receptor protein serine/threonine kinase activity | Combining with a signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity by catalysis of the reaction: ATP protein serine = ADP + protein serine phosphate, and ATP + protein threonine = ADP + protein threonine phosphate. | 291 |
| GO:0038023 | signaling receptor activity | Receiving a signal and transmitting the signal 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. | 107 |
| GO:0001653 | peptide receptor activity | Combining with an extracellular or intracellular peptide to initiate a change in cell activity. | 79 |
| GO:0004709 | MAP kinase kinase kinase activity | Catalysis of the phosphorylation and activation of a MAP kinase kinase; each MAP kinase kinase can be phosphorylated by any of several MAP kinase kinase kinases. | 73 |
| GO:0004705 | JUN kinase activity | Catalysis of the reaction: JUN + ATP = JUN phosphate + ADP. This reaction is the phosphorylation and activation of members of the JUN family, a gene family that encodes nuclear transcription factors. | 68 |
| GO:0019199 | transmembrane receptor protein kinase activity | Combining with a signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity by catalysis of the reaction: a protein + ATP = a phosphoprotein + ADP. | 60 |
| GO:0000155 | phosphorelay sensor kinase activity | Catalysis of the phosphorylation of a histidine residue in response to detection of an extracellular signal such as a chemical ligand or change in environment, to initiate a change in cell state or activity. The two-component sensor is a histidine kinase that autophosphorylates a histidine residue in its active site. The phosphate is then transferred to an aspartate residue in a downstream response regulator, to trigger a response. | 56 |
| GO:0004707 | MAP kinase activity | Catalysis of the reaction: protein + ATP = protein phosphate + ADP. This reaction is the phosphorylation of proteins. Mitogen-activated protein kinase; a family of protein kinases that perform a crucial step in relaying signals from the plasma membrane to the nucleus. They are activated by a wide range of proliferation- or differentiation-inducing signals; activation is strong with agonists such as polypeptide growth factors and tumor-promoting phorbol esters, but weak (in most cell backgrounds) by stress stimuli. | 40 |
| GO:0004970 | ionotropic glutamate receptor activity | Catalysis of the transmembrane transfer of an ion by a channel that opens when glutamate has been bound by the channel complex or one of its constituent parts. | 33 |
| GO:0005057 | receptor signaling protein activity | Conveys a signal from an upstream receptor or intracellular signal transducer, converting the signal into a form where it can ultimately trigger a change in the state or activity of a cell. | 33 |
| GO:0009927 | histidine phosphotransfer kinase activity | Serves as a phospho-His intermediate enabling the transfer of phospho group between a hybrid kinase and a response regulator. | 29 |
| GO:0030108 | HLA-A specific activating MHC class I receptor activity | Combining with a MHC class I molecule of the HLA-A subclass to mediate signaling that activates a lymphocyte. | 25 |
| GO:0009882 | blue light photoreceptor activity | The function of absorbing and responding to electromagnetic radiation with a wavelength of approximately 400-470nm. The response may involve a change in conformation. | 23 |
| GO:0004965 | G-protein coupled GABA receptor activity | Combining with the amino acid gamma-aminobutyric acid (GABA, 4-aminobutyrate) and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex. | 21 |
| GO:0004888 | transmembrane signaling receptor activity | Combining with an extracellular or intracellular signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. | 18 |
| GO:0004958 | prostaglandin F receptor activity | Combining with prostaglandin F (PGF (2-alpha)) to initiate a change in cell activity. | 17 |
| GO:0004704 | NF-kappaB-inducing kinase activity | Catalysis of the phosphorylation of the alpha or beta subunit of the inhibitor of kappaB kinase complex (IKK). | 15 |
| GO:0009400 | receptor signaling protein serine/threonine phosphatase activity | Conveys a signal from an upstream receptor or intracellular signal transducer by catalysis of the reaction: protein serine phosphate + H2O = protein serine + phosphate, and protein threonine phosphate + H2O = protein threonine + phosphate. | 12 |
| GO:0000156 | phosphorelay response regulator activity | Responds to a phosphorelay sensor to initiate a change in cell state or activity. The activity of the response regulator is regulated by transfer of a phosphate from a histidine residue in the sensor, to an aspartate residue in the response regulator. Many but not all response regulators act as transcriptional regulators to elicit a response. | 10 |
| GO:0031516 | far-red light photoreceptor activity | The function of absorbing and responding to electromagnetic radiation with a wavelength of approximately 730nm. The response may involve a change in conformation. | 10 |
| GO:0031517 | red light photoreceptor activity | The function of absorbing and responding to electromagnetic radiation with a wavelength of approximately 660nm. The response may involve a change in conformation. | 10 |
| GO:0008020 | G-protein coupled photoreceptor activity | Combining with incidental electromagnetic radiation, particularly visible light, and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex. | 9 |
| GO:0008281 | sulfonylurea receptor activity | Combining with sulfonylurea, and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. | 8 |
| GO:0005034 | osmosensor activity | Sensing extracellular osmolarity to initiate a change in cell activity, and spanning the membrane of the cell. | 8 |
| GO:0009885 | transmembrane histidine kinase cytokinin receptor activity | Combining with a cytokinin and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity by catalysis of the reaction: ATP + a protein-L-histidine = ADP + a protein-L-histidine phosphate. | 8 |
| GO:0015464 | acetylcholine receptor activity | Combining with acetylcholine and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. | 8 |
| GO:0004957 | prostaglandin E receptor activity | Combining with prostaglandin E (PGE(2)) to initiate a change in cell activity. | 7 |
| GO:0004702 | receptor signaling protein serine/threonine kinase activity | Conveys a signal from an upstream receptor or intracellular signal transducer by catalysis of the reaction: ATP protein serine = ADP + protein serine phosphate, and ATP + protein threonine = ADP + protein threonine phosphate. | 6 |
| GO:0001595 | angiotensin receptor activity | Combining with angiotensin to initiate a change in cell activity. | 4 |
| GO:0004930 | G-protein coupled receptor activity | Combining with an extracellular signal and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex. | 4 |
| GO:0008158 | hedgehog receptor activity | Combining with a member of the hedgehog protein family and transmitting the signal across the membrane to initiate a change in cell activity. | 3 |
| GO:0005003 | ephrin receptor activity | Combining with an ephrin to initiate a change in cell activity. | 2 |
| GO:0001635 | calcitonin gene-related polypeptide receptor activity | Combining with a calcitonin gene-related polypeptide to initiate a change in cell activity. | 2 |
| GO:0005024 | transforming growth factor beta-activated receptor activity | Combining with a transforming growth factor beta (TGFbeta) and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity by catalysis of the reaction: ATP protein serine = ADP + protein serine phosphate, and ATP + protein threonine = ADP + protein threonine phosphate. | 2 |
| GO:0008503 | benzodiazepine receptor activity | Combining with benzodiazepines, a class of drugs with hypnotic, anxiolytic, anticonvulsive, amnestic and myorelaxant properties, to initiate a change in cell activity. | 1 |
| GO:0004714 | transmembrane receptor protein tyrosine kinase activity | Combining with a signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity by catalysis of the reaction: ATP + a protein-L-tyrosine = ADP + a protein-L-tyrosine phosphate. | 1 |
| GO:0009881 | photoreceptor activity | The function of absorbing and responding to incidental electromagnetic radiation, particularly visible light. The response may involve a change in conformation. | 1 |
| GO:0015277 | kainate selective glutamate receptor activity | An ionotropic glutamate receptor activity that exhibits fast gating by glutamate, acts by opening a cation channel permeable to sodium and potassium, and for which kainate is an agonist. | 1 |