Receptor-associated independent cAMP nanodomains mediate spatiotemporal specificity of GPCR signaling.
Cell
; 185(7): 1130-1142.e11, 2022 03 31.
Article
em En
| MEDLINE
| ID: mdl-35294858
ABSTRACT
G protein-coupled receptors (GPCRs) relay extracellular stimuli into specific cellular functions. Cells express many different GPCRs, but all these GPCRs signal to only a few second messengers such as cAMP. It is largely unknown how cells distinguish between signals triggered by different GPCRs to orchestrate their complex functions. Here, we demonstrate that individual GPCRs signal via receptor-associated independent cAMP nanodomains (RAINs) that constitute self-sufficient, independent cell signaling units. Low concentrations of glucagon-like peptide 1 (GLP-1) and isoproterenol exclusively generate highly localized cAMP pools around GLP-1- and ß2-adrenergic receptors, respectively, which are protected from cAMP originating from other receptors and cell compartments. Mapping local cAMP concentrations with engineered GPCR nanorulers reveals gradients over only tens of nanometers that define the size of individual RAINs. The coexistence of many such RAINs allows a single cell to operate thousands of independent cellular signals simultaneously, rather than function as a simple "on/off" switch.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transdução de Sinais
/
Receptores Acoplados a Proteínas G
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
Cell
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Alemanha