The O-linked-N -acetylglucosamine (O-GlcNAc) modifi cation of cytoplasmic and nuclear proteins regulates basic cellular functions and is involved in the aetiology of diabetes and neurodegeneration. This intracellular O-GlcNAcylation is catalyzed by a single O-GlcNAc transferase, OGT. Here we report a novel OGT, EOGT, responsible for extracellular O-GlcNAcylation. Although both OGT and EOGT are regulated by hexosamine fl ux, EOGT localizes to the lumen of the endoplasmic reticulum and transfers GlcNAc to epidermal growth factor-like domains in an OGT-independent manner. Loss of Eogt gives phenotypes similar to those caused by defects in the apical extracellular matrix. Dumpy (Dp), a membrane-anchored extracellular protein, is O-GlcNAcylated, and EOGT is required for Dp-dependent epithelial cell -matrix interactions. Thus, O-GlcNAcylation of secreted and membrane glycoproteins is a novel mediator of cell -cell or cell -matrix interactions at the cell surface.
This paper is focused on the figure of a Mayogini, a female healer in Patan. Nepal, and her relation with the goddess of Vijesvari Temple, from whom she derives her power. In particular, I am interested in the source of the Mayogini power's and the ritual by which she heals.
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