SGIP1 modulates kinetics and interactions of the cannabinoid receptor 1 and G protein-coupled receptor kinase 3 signalosome

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378050%3A_____%2F22%3A00554555" target="_blank" >RIV/68378050:_____/22:00554555 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/10.1111/jnc.15569" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1111/jnc.15569</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jnc.15569" target="_blank" >10.1111/jnc.15569</a>

Result language

angličtina

Original language name

SGIP1 modulates kinetics and interactions of the cannabinoid receptor 1 and G protein-coupled receptor kinase 3 signalosome

Original language description

Cannabinoid receptor 1 (CB1R), a G protein-coupled receptor, plays a fundamental role in synaptic plasticity. Abnormal activity and deregulation of CB1R signaling result in a broad spectrum of pathological conditions. CB1R signaling is regulated by receptor desensitization including phosphorylation of residues within the intracellular C terminus by G protein-coupled receptor kinases (GRKs) that may lead to endocytosis. Furthermore, CB1R signaling is regulated by the protein Src homology 3-domain growth factor receptor-bound 2-like (SGIP1) that hinders receptor internalization, while enhancing CB1R association with beta-arrestin. It has been postulated that phosphorylation of two clusters of serine/threonine residues, (425)SMGDS(429) and (TMSVSTDTS468)-T-460, within the CB1R C-tail controls dynamics of the association between receptor and its interaction partners involved in desensitization. Several molecular determinants of these events are still not well understood. We hypothesized that the dynamics of these interactions are modulated by SGIP1. Using a panel of CB1Rs mutated in the aforementioned serine and threonine residues, together with an array of Bioluminescence energy transfer-based (BRET) sensors, we discovered that GRK3 forms complexes with G beta gamma subunits of G proteins that largely independent of GRK3's interaction with CB1R. Furthermore, CB1R interacts only with activated GRK3. Interestingly, phosphorylation of two specific residues on CB1R triggers GRK3 dissociation from the desensitized receptor. SGIP1 increases the association of GRK3 with G beta gamma subunits of G proteins, and with CB1R. Altogether, our data suggest that the CB1R signalosome complex is dynamically controlled by sequential phosphorylation of the receptor C-tail and is also modified by SGIP1.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30103 - Neurosciences (including psychophysiology)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Neurochemistry

ISSN

0022-3042

e-ISSN

1471-4159

Volume of the periodical

160

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

625-642

UT code for WoS article

000740991000001

EID of the result in the Scopus database

—