2014
beta-Arrestin Promotes Wnt-induced Low Density Lipoprotein Receptor-related Protein 6 (Lrp6) Phosphorylation via Increased Membrane Recruitment of Amer1 Protein
KŘÍŽ, Vítězslav; Vendula POSPÍCHALOVÁ; Jan MAŠEK; Michaela Brita Christina KILANDER; Josef SLAVIK et al.Základní údaje
Originální název
beta-Arrestin Promotes Wnt-induced Low Density Lipoprotein Receptor-related Protein 6 (Lrp6) Phosphorylation via Increased Membrane Recruitment of Amer1 Protein
Autoři
KŘÍŽ, Vítězslav; Vendula POSPÍCHALOVÁ; Jan MAŠEK; Michaela Brita Christina KILANDER; Josef SLAVIK; Kristina TANNEBERGER; Gunnar SCHULTE; Miroslav MCHALA; Alois KOZUBÍK; Jurgen BEHRENS a Vítězslav BRYJA
Vydání
Journal of Biological Chemistry, Rockville, The American Society for Biochemistry and Molecular Biology, 2014, 0021-9258
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 4.573
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/14:00073566
Organizační jednotka
Přírodovědecká fakulta
UT WoS
EID Scopus
Klíčová slova anglicky
CONVERGENT EXTENSION MOVEMENTS; SIGNALING PATHWAYS; IN-VIVO; CATENIN; ACTIVATION; BETA-ARRESTIN-2; DVL; APC; ENDOCYTOSIS; MECHANISM
Změněno: 4. 10. 2019 15:58, Mgr. Marie Novosadová Šípková, DiS.
Anotace
V originále
beta-Arrestin is a scaffold protein that regulates signal transduction by seven transmembrane-spanning receptors. Among other functions it is also critically required for Wnt/beta-catenin signal transduction. In the present study we provide for the first time a mechanistic basis for the beta-arrestin function in Wnt/beta-catenin signaling. We demonstrate that beta-arrestin is required for efficient Wnt3a-induced Lrp6 phosphorylation, a key event in downstream signaling. beta-Arrestin regulates Lrp6 phosphorylation via a novel interaction with phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P-2)-binding protein Amer1/WTX/Fam123b. Amer1 has been shown very recently to bridge Wnt-induced and Dishevelled-associated PtdIns(4,5)P-2 production to the phosphorylation of Lrp6. Using fluorescence recovery after photobleaching we show here that beta-arrestin is required for the Wnt3a-induced Amer1 membrane dynamics and downstream signaling. Finally, we show that beta-arrestin interacts with PtdIns kinases PI4KII alpha and PIP5KI beta. Importantly, cells lacking beta-arrestin showed higher steady-state levels of the relevant PtdInsP and were unable to increase levels of these PtdInsP in response to Wnt3a. In summary, our data show that beta-arrestins regulate Wnt3a-induced Lrp6 phosphorylation by the regulation of the membrane dynamics of Amer1. We propose that beta-arrestins via their scaffolding function facilitate Amer1 interaction with PtdIns(4,5)P-2, which is produced locally upon Wnt3a stimulation by beta-arrestin- and Dishevelled-associated kinases.
Návaznosti
| EE2.3.20.0180, projekt VaV |
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| EE2.3.30.0009, projekt VaV |
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| GA204/09/0498, projekt VaV |
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| MSM0021622430, záměr |
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