RGD Reference Report - Proinflammatory mediators modulate the heat-activated ion channel TRPV1 via the scaffolding protein AKAP79/150. - Rat Genome Database

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Proinflammatory mediators modulate the heat-activated ion channel TRPV1 via the scaffolding protein AKAP79/150.

Authors: Zhang, X  Li, L  McNaughton, PA 
Citation: Zhang X, etal., Neuron. 2008 Aug 14;59(3):450-61.
RGD ID: 2313200
Pubmed: PMID:18701070   (View Abstract at PubMed)
DOI: DOI:10.1016/j.neuron.2008.05.015   (Journal Full-text)

The ability of vertebrates to detect and avoid damaging extremes of temperature depends on activation of ion channels belonging to the thermo-TRP family. Injury or inflammation causes the release of inflammatory mediators which lower the threshold for detection of painful levels of heat, a process known as heat hyperalgesia. These inflammatory mediators act by at least three distinct intracellular signaling pathways. Here, we show that modulation of the sensitivity of the heat-activated ion channel TRPV1 by the protein kinases PKA and PKC and by the phosphatase calcineurin depends on the formation of a signaling complex between these enzymes, the scaffolding protein AKAP79/150 and TRPV1. We identify a critical region in the TRPV1 C-terminal which mediates binding of AKAP79/150. If binding is prevented, then sensitization by both bradykinin and PGE(2) is abrogated. AKAP79/150 is therefore a final common element in heat hyperalgesia, on which the effects of multiple proinflammatory mediators converge.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
negative regulation of monoatomic ion transport  IMP 2313200DesensitizationRGD 

Molecular Function
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
protein binding  IPITrpv1 (Rattus norvegicus)2313200 RGD 
protein binding  IPIAkap5 (Rattus norvegicus)2313200 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Akap5  (A-kinase anchoring protein 5)
Trpv1  (transient receptor potential cation channel, subfamily V, member 1)


Additional Information