2014
Disheveled regulates precoupling of heterotrimeric G proteins to Frizzled 6
KILLANDER, Michaela BC; Julian PETERSEN; Kjetil Wessel ANDRESSEN; Sri Ranjani GANJI; Finn Olav LEVY et. al.Základní údaje
Originální název
Disheveled regulates precoupling of heterotrimeric G proteins to Frizzled 6
Autoři
KILLANDER, Michaela BC (752 Švédsko); Julian PETERSEN (752 Švédsko); Kjetil Wessel ANDRESSEN (578 Norsko); Sri Ranjani GANJI (356 Indie, domácí); Finn Olav LEVY (578 Norsko); Jens SCHUSTER (752 Švédsko); Niklas DAHL (752 Švédsko); Vítězslav BRYJA (203 Česká republika, garant, domácí) a Gunnar SCHULTE (276 Německo, domácí)
Vydání
FASEB JOURNAL, 2014, 0892-6638
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
Genetika a molekulární biologie
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 5.043
Kód RIV
RIV/00216224:14310/14:00073587
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000335336000031
EID Scopus
2-s2.0-84901016804
Klíčová slova anglicky
GNAI1; GNAQ; GPCR; WNT-5A
Změněno: 27. 4. 2015 15:08, Ing. Andrea Mikešková
Anotace
V originále
Frizzleds (FZDs) are classified as G-protein-coupling receptors, but how signals are initiated and specified through heterotrimeric G proteins is unknown. FZD6 regulates convergent extension movements, and its C-terminal Arg511Cys mutation causes nail dysplasia in humans. We investigated the functional relationship between FZD6, Disheveled (DVL), and heterotrimeric G proteins. Live cell imaging combined with fluorescence recovery after photobleaching (FRAP) revealed that inactive human FZD6 precouples to GALPHAi1 and GALPHAq but not to GALPHAoA,GALPHAs, and GALPHA12 proteins. G-protein coupling is measured as a 10-20% reduction in the mobile fraction of fluorescently tagged G proteins on chemical receptor surface cross-linking. The FZD6 Arg511Cys mutation is incapable of G-protein precoupling, even though it still binds DVL. Using both FRAP and Förster resonance energy transfer (FRET) technology, we showed that the FZD6-GALPHAi1 and FZD-GALPHAq complexes dissociate on WNT-5A stimulation. Most important, G-protein precoupling of FZD6 and WNT-5A-induced signaling to extracellular signal-regulated kinase1/2 were impaired by DVL knockdown or overexpression, arguing for a strict dependence of FZD6-G-protein coupling on DVL levels and identifying DVL as a master regulator of FZD/G-protein signaling. In summary, we propose a mechanistic connection between DVL and G proteins integrating WNT, FZD, G-protein, and DVL function.
Návaznosti
EE2.3.20.0180, projekt VaV |
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GA13-32990S, projekt VaV |
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GA204/09/0498, projekt VaV |
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GD204/09/H058, projekt VaV |
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MSM0021622430, záměr |
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