TY - JOUR
T1 - An O-GlcNAc transferase pathogenic variant linked to intellectual disability affects pluripotent stem cell self-renewal
AU - Omelková, Michaela
AU - Fenger, Christina Dühring
AU - Murray, Marta
AU - Hammer, Trine Bjørg
AU - Pravata, Veronica M.
AU - Bartual, Sergio Galan
AU - Czajewski, Ignacy
AU - Bayat, Allan
AU - Ferenbach, Andrew T.
AU - Stavridis, Marios P.
AU - van Aalten, Daan M.F.
N1 - Publisher Copyright:
© 2023. Published by The Company of Biologists Ltd.
PY - 2023/6
Y1 - 2023/6
N2 - O-linked β-N-acetylglucosamine (O-GlcNAc) transferase (OGT) is an essential enzyme that modifies proteins with O-GlcNAc. Inborn OGT genetic variants were recently shown to mediate a novel type of congenital hdisorder of glycosylation (OGT-CDG), which is characterised by X-linked intellectual disability (XLID) and developmental delay. Here, we report an OGTC921Y variant that co-segregates with XLID and epileptic seizures, and results in loss of catalytic activity. Colonies formed by mouse embryonic stem cells carrying OGTC921Y showed decreased levels of protein O-GlcNAcylation accompanied by decreased levels of Oct4 (encoded by Pou5f1), Sox2 and extracellular alkaline phosphatase (ALP), implying reduced self-renewal capacity. These data establish a link between OGT-CDG and embryonic stem cell self-renewal, providing a foundation for examining the developmental aetiology of this syndrome.
AB - O-linked β-N-acetylglucosamine (O-GlcNAc) transferase (OGT) is an essential enzyme that modifies proteins with O-GlcNAc. Inborn OGT genetic variants were recently shown to mediate a novel type of congenital hdisorder of glycosylation (OGT-CDG), which is characterised by X-linked intellectual disability (XLID) and developmental delay. Here, we report an OGTC921Y variant that co-segregates with XLID and epileptic seizures, and results in loss of catalytic activity. Colonies formed by mouse embryonic stem cells carrying OGTC921Y showed decreased levels of protein O-GlcNAcylation accompanied by decreased levels of Oct4 (encoded by Pou5f1), Sox2 and extracellular alkaline phosphatase (ALP), implying reduced self-renewal capacity. These data establish a link between OGT-CDG and embryonic stem cell self-renewal, providing a foundation for examining the developmental aetiology of this syndrome.
KW - Congenital disorders of glycosylation
KW - Intellectual disability
KW - O-GlcNAc
KW - OGT
KW - Self-renewal
KW - Stem cells
U2 - 10.1242/dmm.049132
DO - 10.1242/dmm.049132
M3 - Journal article
C2 - 37334838
AN - SCOPUS:85162652512
SN - 1754-8403
VL - 16
JO - DMM Disease Models and Mechanisms
JF - DMM Disease Models and Mechanisms
IS - 6
M1 - dmm049132
ER -