About: Heterotrimeric G Protein     Goto   Sponge   NotDistinct   Permalink

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AttributesValues
rdf:type
rdfs:label
  • Heterotrimeric G Protein
rdfs:subClassOf
Semantic_Type
  • Amino Acid, Peptide, or Protein
  • Enzyme
Preferred_Name
  • Heterotrimeric G Protein
UMLS_CUI
  • C0752348
Legacy_Concept_Name
  • Heterotrimeric_G_Protein
FULL_SYN
  • Heterotrimeric G ProteinPTNCI
DEFINITION
  • Heterotrimeric guanine nucleotide-binding proteins (G proteins) are signal transducers, attached to the cell surface plasma membrane, that connect receptors to effectors and thus to intracellular signaling pathways (1). Receptors that couple to G proteins communicate signals from a large number of hormones, neurotransmitters, chemokines, and autocrine and paracrine factors. After the first four G proteins (Gs, Gt, Gi, and Go) were identified by biochemical purification, a large number of G proteins and their subunits were identified by cDNA cloning (2). G proteins consist of three subunits, alpha, beta, and gamma. When signaling, they function in essence as dimers because the signal is communicated either by the Ga subunit or the Gbg complex. In most cases, Gbg subunits cannot be dissociated under nondenaturing conditions. Currently there are 20 known G, 6 G, and 11 G subunits. (from Science 2002;296:1636-9)NCI
code
  • C18281
is someValuesFrom of
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