| molecular function |
|---|
| | 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. |
| | 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. |
| biological process |
|---|
| | GO:0009584 | | detection of visible light | | The series of events in which a visible light stimulus is received by a cell and converted into a molecular signal. A visible light stimulus is electromagnetic radiation that can be perceived visually by an organism; for organisms lacking a visual system, this can be defined as light with a wavelength within the range 380 to 780 nm. |
| | GO:0000160 | | phosphorelay signal transduction system | | A conserved series of molecular signals found in prokaryotes and eukaryotes; involves autophosphorylation of a histidine kinase and the transfer of the phosphate group to an aspartate that then acts as a phospho-donor to response regulator proteins. |
| | GO:0007602 | | phototransduction | | The sequence of reactions within a cell required to convert absorbed photons into a molecular signal. |
| | GO:0018298 | | protein-chromophore linkage | | The covalent or noncovalent attachment of a chromophore to a protein. |
| | GO:0006355 | | regulation of transcription, DNA-templated | | Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription. |
| | GO:0007165 | | signal transduction | | The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell. |
| | GO:0023014 | | signal transduction by protein phosphorylation | | A process in which the transfer of one or more phosphate groups to a substrate transmits a signal to the phosphorylated substrate. |
| cellular component |
|---|
| | GO:0005622 | | intracellular | | The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm. |
Description
