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Alternative model for FMRP phosphorylation and regulation of translation.
Alternative model for FMRP phosphorylation and regulation of translation. FMRP is first phosphorylated by CK2 on S499. FMRP S499 phosphorylation is permissive for secondary phosphorylation of FMRP on serine/threonine residues, presumably downstream of mGluR-I, by unknown kinases. Secondary phosphorylation of FMRP is counteracted by PP2A-mediated dephosphorylation. The dotted green and red lines are provisional and indicate that the relationship between FMRP’s phosphorylation status and protein translation is unknown. Christopher M. Bartley et al. eNeuro 2016;3:ENEURO ©2016 by Society for Neuroscience
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