Signal Transduction

Signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor. In turn, this receptor alters intracellular molecules creating a response. There are two stages in this process:

  1. A signaling molecule activates a specific receptor protein on the cell membrane.
  2. A second messenger transmits the signal into the cell, eliciting a physiological response.

In either step, the signal can be amplified. Thus, one signalling molecule can cause many responses.

Read more about Signal Transduction:  History, Environmental Stimuli, Receptors, Cellular Responses, Major Pathways

Other articles related to "signal transduction, signals, signal":

... apoptotic process • cytoskeleton organization • signal transduction • epidermal growth factor receptor signaling pathway • activation of adenylate cyclase activity • small GTPase mediated ... The c-Raf protein functions in the MAPK/ERK signal transduction pathway as part of a protein kinase cascade ...
... process • apoptotic process • small GTPase mediated signal transduction • lamellipodium assembly • regulation of Rho protein signal transduction • intracellular signal transduction • filopodium ... The encoded protein may form complex with G proteins and stimulate Rho-dependent signals ...
... Biological process • small GTPase mediated signal transduction • Rho protein signal transduction • axon guidance • cell migration • regulation of small GTPase mediated ...
1345171 HomoloGene 10309 GeneCards SH2B2 Gene Gene Ontology Molecular function • signal transducer activity • SH3/SH2 adaptor activity ... stimulation and Grb2 after stimulation, it appears to play a role in signal transduction from the receptor to Shc/Grb2 ...

Famous quotes containing the word signal:

    Change begets change. Nothing propagates so fast. If a man habituated to a narrow circle of cares and pleasures, out of which he seldom travels, step beyond it, though for never so brief a space, his departure from the monotonous scene on which he has been an actor of importance would seem to be the signal for instant confusion.... The mine which Time has slowly dug beneath familiar objects is sprung in an instant; and what was rock before, becomes but sand and dust.
    Charles Dickens (1812–1870)