@article{oai:repo.qst.go.jp:00048810, author = {三浦, 太一 and 粂, 優彦 and 川村, 猛 and 山本一夫 and 浜窪, 隆雄 and 西原祥子 and 三浦 太一}, journal = {Stem Cell Reports}, month = {Dec}, note = {Mouse embryonic stem cells (ESCs) differentiate into multiple cell types during organismal development. Fibroblast growth factor 4 (FGF4) signaling induces differentiation from ESCs via the phosphorylation of downstream molecules such as mitogen-activated protein kinase/extracellular signal-related kinase (MEK) and extracellular signal-related kinase 1/2 (ERK1/2). The FGF4-MEK-ERK1/2 pathway is inhibited to maintain ESCs in the undifferentiated state. However, the inhibitory mechanism of the FGF4-MEK-ERK1/2 pathway in ESCs is uncharacterized. O-linked β-N-acetylglucosaminylation (O-GlcNAcylation) is a post-translational modification characterized by the attachment of a single N-acetylglucosamine (GlcNAc) to the serine and threonine residues of nuclear or cytoplasmic proteins. Here, we showed that the O-GlcNAc on the phosphorylation site of PKCζ inhibits PKCζ phosphorylation (activation) and, consequently, the FGF4-PKCζ-MEK-ERK1/2 pathway in ESCs. Our results demonstrate the mechanism for the maintenance of the undifferentiated state of ESCs via the inhibition of the FGF4-PKCζ-MEK-ERK1/2 pathway by O-GlcNAcylation on PKCζ.}, pages = {1--15}, title = {O-GlcNAc on PKCζ Inhibits the FGF4-PKCζ-MEK-ERK1/2 Pathway via Inhibition of PKCζ Phosphorylation in Mouse Embryonic Stem Cells}, volume = {10}, year = {2017} }