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Liu X, Cai YD, Hou C, Liu X, Luo Y, Mendiola AJP, Xu X, Luo Y, Zheng H, Zhao C, Chen CH, Zhang Y, Xiang YK, Ma J, Chiu JC. O-GlcNAcylation of nuclear proteins in the mouse liver exhibit daily oscillations that are influenced by meal timing. PLoS biology 2025 23(9) 40997131
Abstract:
The liver circadian clock and hepatic transcriptome are highly responsive to metabolic signals generated from feeding-fasting rhythm. Previous studies have identified a number of nutrient-sensitive signaling pathways that could interpret metabolic input to regulate rhythmic hepatic biology. Here, we investigated the role of O-GlcNAcylation, a nutrient-sensitive post-translational modification (PTM) in mediating metabolic regulation of rhythmic biology in the liver. We observe daily oscillation of global nuclear protein O-GlcNAcylation in the liver of mice subjected to night-restricted feeding (NRF) using label-free global O-GlcNAc proteomics. Additional site-specific O-GlcNAc analysis by tandem mass tag mass spectrometry further supports temporal differences in O-GlcNAcylation by revealing day-night differences. Proteins involved in gene expression are enriched among rhythmically O-GlcNAcylated proteins, suggesting rhythmic O-GlcNAcylation may directly regulate the hepatic transcriptome. We show that rhythmic O-GlcNAcylation can also indirectly modulate nuclear proteins by interacting with phosphorylation. Several proteins harboring O-GlcNAcylation-phosphorylation interplay motif exhibit rhythmic O-GlcNAcylation and phosphorylation. Specifically, we show that O-GlcNAcylation occurs at a phospho-degron of a key circadian transcriptional activator, circadian locomotor output cycles kaput (CLOCK), thus regulating its stability and transcriptional output. Finally, we report that day-restricted feeding (DRF) in the nocturnal mouse significantly alters O-GlcNAcylation pattern. Whereas global O-GlcNAcylation analysis indicates dampening of global O-GlcNAcylation rhythm in mice fed under DRF, site-specific analysis reveals differential responses of O-GlcNAc sites when timing of food intake is altered. Notably, a substantial number of O-GlcNAcylation sites exhibit inverted day-night profiles when mice are subjected to DRF. This suggests the dysregulation of daily nuclear protein O-GlcNAcylation rhythm may contribute to the disruption in liver transcriptome previously observed in DRF condition. In summary, our results provide new mechanistic insights into metabolic regulation of hepatic transcriptional regulators via interplay between O-GlcNAcylation and phosphorylation and shed light on the deleterious effects of improper mealtimes.
O-GlcNAc proteins:
A0A075B680, A0A087WQ44, A0A087WSN6, A0A0A6YVV8, A0A0B6VMB2, A0A0F7QZE4, A0A0G2JGY6, A0A0R4J092, A0A0U1RNL9, A0A1I7Q4G8, A0A1N9PTV1, A0A1Y7VP67, A0A286YCY7, A2A654, ZMYM4, TM201, MED14, A2ADB1, A2AJ72, S35D1, BCORL, A2AQR4, A2ATN3, MGAP, KANL3, PHRF1, B1AR09, B1ASA5, B2RQG2, B2RR24, B2RT41, B2RUQ2, EP300, RBM25, B7ZNL9, D3YWX2, D3Z0K6, D3Z2U7, E9PUF4, E9PUH7, FIBA, E9PV38, SET1A, PARP4, PRR12, E9Q1A5, E9Q1M6, ICE1, E9Q3L4, ANR11, ARI1B, SETD2, YTDC1, ZC3HD, ARID2, E9Q7G1, E9Q9V3, E9Q9Y2, E9QAN9, E9QAP7, E9QKL0, E9QMD3, E9QNA7, F6R9G0, F6T8X6, BICRA, G3UVU2, G3X8Q1, G3X928, G3X961, G3X972, G3X9Q0, PCF11, G5E896, H9KV00, ERR1, GTPB1, HNF6, CLOCK, GLU2B, ATN1, IMA3, KLF12, CALU, AF10, ZN143, SP3, KDM6A, ZN106, ZFR, CCNK, PIAS1, LGMN, SP1, IGHG3, CFAH, EGR1, ITB1, ATX1L, CATB, ITPR1, B4GT1, HNF1A, PGH1, A1AT2, NFYA, PO2F1, 3BHS3, HNF1B, CEBPB, CELF1, RXRA, VTNC, NKTR, SUH, ANT3, G6PC1, FOXA1, FOXK1, STAT3, CBP, FKBP2, FOSL2, RFX1, LMNA, STS, MAT1, PON1, CEBPA, ATX1, RD23B, KMT2A, FUS, PAXB1, LMA2L, MRTFB, SUMO2, PP1B, RS11, SMD3, NFYB, SUMO1, ZHX1, TIAR, TBX3, NFYC, ATF1, ERG, NFIB, RBBP6, GABPA, CREB1, S30BP, NFIA, ZEP1, SPA3M, PPA5, CLUS, GATA4, CHD8, CDK12, Q3T9J2, KHDC4, Q3TGN5, PRC2C, CIART, K22E, YETS2, Q3U1M7, LMF1, FOXK2, PUF60, RREB1, ZEP2, UD3A1, ZCCHV, PRRC1, SFSWA, PRD10, ERMP1, Q3UXF4, TMED1, ZBT45, Q569X9, LIN54, TASO2, RESF1, ZN652, NUFP2, KDM6B, Q5PRE9, Q5RIM6, RBM27, UTP18, Q5SUT0, MED13, Q5SXC4, SFR19, UIMC1, A1CF, SIN3A, CSK21, CAPR1, MEF2A, RBBP7, KLF3, NCOA2, USF1, CTCF, GATA6, TS101, HCFC1, ZN148, HIRA, LASP1, RAI1, MAFK, PRG2, SPTB2, SSXT, TAF6, UD19, NUP62, UD11, MEF2D, TIF1A, USF2, CDK13, JHD2C, HECD1, Q6DI81, SCAF8, NOMO1, FND3B, Q6NXL1, ZMIZ1, NSD3, UGGG1, ALG8, AHDC1, PTN23, PIGS, NUP98, NFRKB, GNAS1, ONEC2, FNBP4, CNOT1, NU188, SPCS3, PICAL, HUWE1, CPEB4, PRR14, ATX2L, NACC1, MCAF1, KANL1, NU214, PR40B, UBN2, TNC18, UBP2L, ZN598, Q80ZX0, DDX42, LPP, TET3, E41L5, SP130, ZC3HE, SUN2, EST2E, NCEH1, ARI5B, EMSY, TM260, RFOX2, TM209, KMT2C, ASPH, SRRM2, NUP54, CPSF7, TOX4, IFIX, CREST, Z385B, PIGT, PGLT1, YTHD3, KAT6A, ASXL2, ZN609, POGZ, SREK1, ZHX2, ZHX3, P20D1, MBNL2, RBM14, PIAS2, CNOT2, ITCH, DIDO1, EPC1, SCYL2, G6PE, TCRG1, BCOR, CCAR1, Q8CHB3, ADNP2, BICRL, EP400, PHC3, P66A, FWCH1, PDLI5, NUP42, ZMIZ2, BTD, UD3A2, ESRP2, TAF10, ZBT20, Q8K154, GT251, ALG3, BRD3, I2BPL, PO121, SF3A1, EST2A, SF3B4, Q8R084, ZBT44, MTSS1, TMED4, ZC3HA, UBQL1, NUP58, BRD8, ATX7, STAB2, RBM12, RBPS2, MED25, MAVS, ALG12, HNRL1, CDIPT, SRSF4, P66B, TAF9, MCR, SFPQ, MBOA5, UBAP2, SMAP1, NCOA5, RBM47, CREL1, SC16B, BAZ2A, RBM5, RISC, ALS2, BCL7B, TMCO1, SYDC, CIC, MED15, WAC, MED1, GORS2, RBM10, ZN281, MLXPL, ANR17, ZN318, TRI33, PCYOX, NECP1, RBM33, SSRA, CREL2, PINX1, INT12, SP2, PHF14, SUN1, APMAP, FIP1, AP2B1, RPN2, LMAN2, AKAP8, MYPT1, RSRC1, EIF3F, Q9EQC8, ERAP1, SALL1, Q9ERL0, RBP2, RTN3, PALLD, TF2H2, ANM1, NUP50, HAKAI, HYOU1, ELOV1, ZN207, DOPP1, CCNT1, TBL1X, PO210, VKGC, QKI, UBQL2, HIPK2, COP1, PR40A, FOXO1, PIGN, MAN1, GANP, ENTP5, NFAT5, CARM1, FOXO3, FBLN5, IF2H, Q9Z1A1, DEAF1, HTAI2, HNRPF, ITPR2, S4R1W8, V9GX43
Species: Mus musculus
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Lane EA, Choi DW, Garcia-Haro L, Levine ZG, Tedoldi M, Walker S, Danial NN. HCF-1 Regulates De Novo Lipogenesis through a Nutrient-Sensitive Complex with ChREBP. Molecular cell 2019 75(2) 31227231
Abstract:
Carbohydrate response element binding protein (ChREBP) is a key transcriptional regulator of de novo lipogenesis (DNL) in response to carbohydrates and in hepatic steatosis. Mechanisms underlying nutrient modulation of ChREBP are under active investigation. Here we identify host cell factor 1 (HCF-1) as a previously unknown ChREBP-interacting protein that is enriched in liver biopsies of nonalcoholic steatohepatitis (NASH) patients. Biochemical and genetic studies show that HCF-1 is O-GlcNAcylated in response to glucose as a prerequisite for its binding to ChREBP and subsequent recruitment of OGT, ChREBP O-GlcNAcylation, and activation. The HCF-1:ChREBP complex resides at lipogenic gene promoters, where HCF-1 regulates H3K4 trimethylation to prime recruitment of the Jumonji C domain-containing histone demethylase PHF2 for epigenetic activation of these promoters. Overall, these findings define HCF-1's interaction with ChREBP as a previously unappreciated mechanism whereby glucose signals are both relayed to ChREBP and transmitted for epigenetic regulation of lipogenic genes.
O-GlcNAc proteins:
HCFC1, MLXPL
Species: Mus musculus
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Yang AQ, Li D, Chi L, Ye XS. Validation, Identification, and Biological Consequences of the Site-specific O-GlcNAcylation Dynamics of Carbohydrate-responsive Element-binding Protein (ChREBP). Molecular & cellular proteomics : MCP 2017 16(7) 28450420
Abstract:
O-GlcNAcylation of carbohydrate-responsive element-binding protein (ChREBP) is believed as an important modulator of ChREBP activities, however little direct evidence of O-GlcNAcylation on ChREBP and no exact O-GlcNAcylation sites have been reported so far. Here, we validate O-GlcNAcylation on ChREBP in cell-free coupled transcription/translation system and in cells by chemoenzymatic and metabolic labeling, respectively. Moreover, for the first time, we identify O-GlcNAcylation on Ser614 in the C-terminus of ChREBP by mass spectrometry and validate two important sites, Thr517 and Ser839 for O-GlcNAcylation and their function via molecular and chemical biological method. Under high glucose conditions, Ser514 phosphorylation enhances ChREBP O-GlcNAcylation, maintaining the transcriptional activity of ChREBP; Ser839 O-GlcNAcylation is essential for Mlx-heterodimerization and DNA-binding activity enhancement, consequently inducing transcriptional activity. Ser839 O-GlcNAcylation is also crucial for ChREBP nuclear export partially by strengthening interactions with CRM1 and 14-3-3. This work is a detailed study of ChREBP O-GlcNAcylation and highlights the biological consequences of the site-specific O-GlcNAcylation dynamics of ChREBP.
O-GlcNAc proteins:
MLXPL
Species: Mus musculus
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Fan Q, Nørgaard RC, Bindesbøll C, Lucas C, Dalen KT, Babaie E, Itkonen HM, Matthews J, Nebb HI, Grønning-Wang LM. LXRα Regulates Hepatic ChREBPα Activity and Lipogenesis upon Glucose, but Not Fructose Feeding in Mice. Nutrients 2017 9(7) 28661453
Abstract:
Liver X receptors (LXRα/β) and carbohydrate response element-binding proteins (ChREBPα/β) are key players in the transcriptional control of hepatic de novo lipogenesis. LXRα/β double knockout (LXRα-/-/β-/-) mice have reduced feeding-induced nuclear O-linked N-acetylglucosamine (O-GlcNAc) signaling, ChREBPα activity, and lipogenic gene expression in livers, suggesting important roles for LXRs in linking hepatic glucose utilization to lipid synthesis. However, the role of LXRs in fructose-induced ChREBP activation and lipogenesis is currently unknown. In this study, we studied the effects of high fructose or high glucose feeding on hepatic carbohydrate metabolism and lipogenic gene expression in livers from fasted (24 h) and fasted-refed (12 h) wild type and LXRα knockout (LXRα-/-) mice. Hepatic lipogenic gene expression was reduced in glucose fed, but not fructose fed LXRα-/- mice. This was associated with lower expression of liver pyruvate-kinase (L-pk) and Chrebpβ, indicating reduced ChREBPα activity in glucose fed, but not fructose fed mice. Interestingly, ChREBP binding to the L-pk promoter was increased in fructose fed LXRα-/- mice, concomitant with increased glucose-6-phosphatase (G6pc) expression and O-GlcNAc modified LXRβ, suggesting a role for LXRβ in regulating ChREBPα activity upon fructose feeding. In conclusion, we propose that LXRα is an important regulator of hepatic lipogenesis and ChREBPα activity upon glucose, but not fructose feeding in mice.
O-GlcNAc proteins:
NR1H2, MLXPL, NR1H3
Species: Mus musculus
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Bindesbøll C, Fan Q, Nørgaard RC, MacPherson L, Ruan HB, Wu J, Pedersen TÅ, Steffensen KR, Yang X, Matthews J, Mandrup S, Nebb HI, Grønning-Wang LM. Liver X receptor regulates hepatic nuclear O-GlcNAc signaling and carbohydrate responsive element-binding protein activity. Journal of lipid research 2015 56(4) 25724563
Abstract:
Liver X receptor (LXR)α and LXRβ play key roles in hepatic de novo lipogenesis through their regulation of lipogenic genes, including sterol regulatory element-binding protein (SREBP)-1c and carbohydrate responsive element-binding protein (ChREBP). LXRs activate lipogenic gene transcription in response to feeding, which is believed to be mediated by insulin. We have previously shown that LXRs are targets for glucose-hexosamine-derived O-linked β-N-acetylglucosamine (O-GlcNAc) modification enhancing their ability to regulate SREBP-1c promoter activity in vitro. To elucidate insulin-independent effects of feeding on LXR-mediated lipogenic gene expression in vivo, we subjected control and streptozotocin-treated LXRα/β(+/+) and LXRα/β(-/-) mice to a fasting-refeeding regime. We show that under hyperglycemic and hypoinsulinemic conditions, LXRs maintain their ability to upregulate the expression of glycolytic and lipogenic enzymes, including glucokinase (GK), SREBP-1c, ChREBPα, and the newly identified shorter isoform ChREBPβ. Furthermore, glucose-dependent increases in LXR/retinoid X receptor-regulated luciferase activity driven by the ChREBPα promoter was mediated, at least in part, by O-GlcNAc transferase (OGT) signaling in Huh7 cells. Moreover, we show that LXR and OGT interact and colocalize in the nucleus and that loss of LXRs profoundly reduced nuclear O-GlcNAc signaling and ChREBPα promoter binding activity in vivo. In summary, our study provides evidence that LXRs act as nutrient and glucose metabolic sensors upstream of ChREBP by modulating GK expression, nuclear O-GlcNAc signaling, and ChREBP expression and activity.
O-GlcNAc proteins:
NR1H2, MLXPL, NR1H3
Species: Mus musculus
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Ido-Kitamura Y, Sasaki T, Kobayashi M, Kim HJ, Lee YS, Kikuchi O, Yokota-Hashimoto H, Iizuka K, Accili D, Kitamura T. Hepatic FoxO1 integrates glucose utilization and lipid synthesis through regulation of Chrebp O-glycosylation. PloS one 2012 7(10) 23056614
Abstract:
In liver, glucose utilization and lipid synthesis are inextricably intertwined. When glucose availability exceeds its utilization, lipogenesis increases, leading to increased intrahepatic lipid content and lipoprotein secretion. Although the fate of three-carbon metabolites is largely determined by flux rate through the relevant enzymes, insulin plays a permissive role in this process. But the mechanism integrating insulin receptor signaling to glucose utilization with lipogenesis is unknown. Forkhead box O1 (FoxO1), a downstream effector of insulin signaling, plays a central role in hepatic glucose metabolism through the regulation of hepatic glucose production. In this study, we investigated the mechanism by which FoxO1 integrates hepatic glucose utilization with lipid synthesis. We show that FoxO1 overexpression in hepatocytes reduces activity of carbohydrate response element binding protein (Chrebp), a key regulator of lipogenesis, by suppressing O-linked glycosylation and reducing the protein stability. FoxO1 inhibits high glucose- or O-GlcNAc transferase (OGT)-induced liver-pyruvate kinase (L-PK) promoter activity by decreasing Chrebp recruitment to the L-PK promoter. Conversely, FoxO1 ablation in liver leads to the enhanced O-glycosylation and increased protein level of Chrebp owing to decreased its ubiquitination. We propose that FoxO1 regulation of Chrebp O-glycosylation is a mechanism linking hepatic glucose utilization with lipid synthesis.
O-GlcNAc proteins:
MLXPL
Species: Mus musculus
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Guinez C, Filhoulaud G, Rayah-Benhamed F, Marmier S, Dubuquoy C, Dentin R, Moldes M, Burnol AF, Yang X, Lefebvre T, Girard J, Postic C. O-GlcNAcylation increases ChREBP protein content and transcriptional activity in the liver. Diabetes 2011 60(5) 21471514
Abstract:
Carbohydrate-responsive element-binding protein (ChREBP) is a key transcription factor that mediates the effects of glucose on glycolytic and lipogenic genes in the liver. We have previously reported that liver-specific inhibition of ChREBP prevents hepatic steatosis in ob/ob mice by specifically decreasing lipogenic rates in vivo. To better understand the regulation of ChREBP activity in the liver, we investigated the implication of O-linked β-N-acetylglucosamine (O-GlcNAc or O-GlcNAcylation), an important glucose-dependent posttranslational modification playing multiple roles in transcription, protein stabilization, nuclear localization, and signal transduction.
O-GlcNAc proteins:
MLXPL
Species: Mus musculus
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