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Inoue D, Fujino T, Sheridan P, Zhang YZ, Nagase R, Horikawa S, Li Z, Matsui H, Kanai A, Saika M, Yamaguchi R, Kozuka-Hata H, Kawabata KC, Yokoyama A, Goyama S, Inaba T, Imoto S, Miyano S, Xu M, Yang FC, Oyama M, Kitamura T. A novel ASXL1-OGT axis plays roles in H3K4 methylation and tumor suppression in myeloid malignancies. Leukemia 2018 32(6) 29556021
Abstract:
ASXL1 plays key roles in epigenetic regulation of gene expression through methylation of histone H3K27, and disruption of ASXL1 drives myeloid malignancies, at least in part, via derepression of posterior HOXA loci. However, little is known about the identity of proteins that interact with ASXL1 and about the functions of ASXL1 in modulation of the active histone mark, such as H3K4 methylation. In this study, we demonstrate that ASXL1 is a part of a protein complex containing HCFC1 and OGT; OGT directly stabilizes ASXL1 by O-GlcNAcylation. Disruption of this novel axis inhibited myeloid differentiation and H3K4 methylation as well as H2B glycosylation and impaired transcription of genes involved in myeloid differentiation, splicing, and ribosomal functions; this has implications for myelodysplastic syndrome (MDS) pathogenesis, as each of these processes are perturbed in the disease. This axis is responsible for tumor suppression in the myeloid compartment, as reactivation of OGT induced myeloid differentiation and reduced leukemogenecity both in vivo and in vitro. Our data also suggest that MLL5, a known HCFC1/OGT-interacting protein, is responsible for gene activation by the ASXL1-OGT axis. These data shed light on the novel roles of the ASXL1-OGT axis in H3K4 methylation and activation of transcription.
O-GlcNAc proteins:
ASXL1
Species: Homo sapiens
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Berthier A, Vinod M, Porez G, Steenackers A, Alexandre J, Yamakawa N, Gheeraert C, Ploton M, Maréchal X, Dubois-Chevalier J, Hovasse A, Schaeffer-Reiss C, Cianférani S, Rolando C, Bray F, Duez H, Eeckhoute J, Lefebvre T, Staels B, Lefebvre P. Combinatorial regulation of hepatic cytoplasmic signaling and nuclear transcriptional events by the OGT/REV-ERBα complex. Proceedings of the National Academy of Sciences of the United States of America 2018 115(47) 30397120
Abstract:
The nuclear receptor REV-ERBα integrates the circadian clock with hepatic glucose and lipid metabolism by nucleating transcriptional comodulators at genomic regulatory regions. An interactomic approach identified O-GlcNAc transferase (OGT) as a REV-ERBα-interacting protein. By shielding cytoplasmic OGT from proteasomal degradation and favoring OGT activity in the nucleus, REV-ERBα cyclically increased O-GlcNAcylation of multiple cytoplasmic and nuclear proteins as a function of its rhythmically regulated expression, while REV-ERBα ligands mostly affected cytoplasmic OGT activity. We illustrate this finding by showing that REV-ERBα controls OGT-dependent activities of the cytoplasmic protein kinase AKT, an essential relay in insulin signaling, and of ten-of-eleven translocation (TET) enzymes in the nucleus. AKT phosphorylation was inversely correlated to REV-ERBα expression. REV-ERBα enhanced TET activity and DNA hydroxymethylated cytosine (5hmC) levels in the vicinity of REV-ERBα genomic binding sites. As an example, we show that the REV-ERBα/OGT complex modulates SREBP-1c gene expression throughout the fasting/feeding periods by first repressing AKT phosphorylation and by epigenomically priming the Srebf1 promoter for a further rapid response to insulin. Conclusion: REV-ERBα regulates cytoplasmic and nuclear OGT-controlled processes that integrate at the hepatic SREBF1 locus to control basal and insulin-induced expression of the temporally and nutritionally regulated lipogenic SREBP-1c transcript.
O-GlcNAc proteins:
A4D111, POTEF, A5GZ75, AXA2L, P121C, A9Z0R7, EIFCL, C3UMV2, F1JVV5, I6TRR8, MYO1C, IF2B3, DDX3X, TCRG1, OPLA, XPO1, SC16A, SET1A, OGT1, EIF3D, DDX3Y, DHX15, PRP4, SERA, PSMD3, HNRPR, ACTN4, MYO1B, AKAP8, HNRPQ, UGDH, USO1, WDR1, ANR17, GGCT, LX12B, FLNB, PR40A, SF3B1, SPB7, NU155, KRT38, SC24D, GLSK, SC31A, ELP1, SMC2, AGM1, UTS2, BAG4, SC24A, SC24B, AP2A1, LDHA, AL1A1, PGK1, A2MG, CO3, CYTA, KV117, IGHG1, IGHA1, APOE, APOC2, FIBG, TFR1, TRFE, CATA, ALDOA, TBB4A, G3P, HSPB1, RPN1, RPN2, AT1A1, ARGI1, ALDH2, S10A8, ADT2, GELS, ATPB, APOA4, ENOA, PYGL, G6PI, PDIA1, CATD, ANXA2, CAN1, TBB5, HS90A, SP1, CO1A2, HS90B, PO2F2, GSTP1, VILI, ANXA4, PARP1, LKHA4, ATX1L, POTEI, UBB, UBC, SAA2, HS71A, HS71B, IGG1, TBA3C, TBA3D, THIO, CH60, BIP, HSP7C, PYGB, PYGM, G6PD, PYC, C1TC, NFH, IMDH2, XRCC6, XRCC5, AT1A3, EF2, PDIA4, P4HA1, ENOB, GFAP, ENPL, IDE, PO2F1, HNRPL, PLAK, DESP, AT2A2, HSP76, DDX5, LEG3, TCPA, RL7, VINC, E2AK2, ITIH2, ANXA7, HNF1A, FILA, CD11B, FLNA, VDAC1, TGM2, PUR2, UBA1, NDKB, TGM1, EST1, SFPQ, SAHH, MCM3, ATPA, PTBP1, SYVC, ABCD3, GRN, TKT, SPB3, AL4A1, PDIA3, KPYR, RPB2, AKT1, PUR9, HNRH1, CASPE, 1433S, S10AB, PRDX2, MCM4, MCM7, HS71L, CTNB1, IRS1, GDE, MYH9, FUS, SPB5, NUP62, TALDO, HSPA9, CAPG, TCPZ, STAT3, MDHC, MDHM, ECHA, GARS, SYIC, HUTH, LPPRC, MATR3, MSH2, VDAC2, SYQ, LEG7, COPD, SPB4, TCPE, AL9A1, LMAN1, FMO5, TCPG, SYAC, RBM25, KLK7, DYN2, TCPQ, TCPD, RAB7A, KS6A3, HNRPM, HXK2, CAZA1, NUP98, ACLY, COPB, COPA, SC24C, SYRC, SYYC, UBP14, HSP72, P5CS, XPO2, TERA, MTP, AF17, PSA, HNRH2, EIF3B, SYMC, NU107, EPIPL, TPIS, ACTB, IF4A1, HNRPK, 1433G, PRS4, ACTA, H4, RS27A, RL40, 1433Z, RACK1, ACTG, ACTH, ACTC, ACTS, TBA1B, TBA4A, TBB4B, PRKDC, DCD, VIGLN, CLH1, HNRPU, FABP5, MSHR, EWS, SEMG2, DSG1, SP3, PLOD1, EF1A2, GFPT1, PRDX1, KHDR1, TGM3, DHX9, LG3BP, DSC1, ILF3, TRAP1, PAK2, PSMD2, PABP4, PICAL, PKP1, BLMH, SNTB1, TBB2A, VEZF1, TRI29, UBP2L, LY6D, SRC8, PDIA5, HS902, EPN4, SMC1A, GANAB, MVP, PLEC, NONO, SC23A, SC23B, CDSN, JHD2C, CYTM, DPYL2, PCKGM, TKFC, Q53G76, Q58FF2, Q59EA0, ZN326, FILA2, UBAP2, KPLCE, RBM26, EF1A3, ARID2, TBA3E, POTEE, SBSN, FBX50, Q70T18, Q71E78, TBA1A, SND1, NUP54, MYH14, PEG10, PRP39, TAXB1, CAND1, CARM1, PRSR1, SPA12, ANKH1, ASXL1, NUP93, RDHE2, Q8N6B4, PDPR, TNR6A, COP1, PDC6I, POF1B, ATX2L, DDX1, BAP1, TFG, RBP56, EVPL, DDX17, RENT1, FUBP2, UBP7, NCLN, H2B1A, WNK4, ZC3HA, SCYL1, SPB12, GSDMA, VPS35, PHF12, CIC, STRBP, VAT1, NUP88, ATX2, CPNE1, TCPH, TBA1C, DIDO1, HNRL1, TBB2B, NUP58, ACTBM, TB182, SP130, WNK1, AGO3, MCCB, MOV10, TNR6C, S10AE, DD19A, ATD3A, TBA8, UGGG1, IF2B1, CALL5, RRBP1, NXF1, S2513, PO2F3, AGO2, AGO1, Q9UL79, ACSL5, DD19B, TNR6B, CD11A, EIF3L, SYFA, KLK5, RTCB, WNK2, PKP3, HYOU1, SNX9, COPG1, IF2B2, S23IP
Species: Homo sapiens
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Zhao P, Viner R, Teo CF, Boons GJ, Horn D, Wells L. Combining high-energy C-trap dissociation and electron transfer dissociation for protein O-GlcNAc modification site assignment. Journal of proteome research 2011 10(9) 21740066
Abstract:
Mass spectrometry-based studies of proteins that are post-translationally modified by O-linked β-N-acetylglucosamine (O-GlcNAc) are challenged in effectively identifying the sites of modification while simultaneously sequencing the peptides. Here we tested the hypothesis that a combination of high-energy C-trap dissociation (HCD) and electron transfer dissociation (ETD) could specifically target the O-GlcNAc modified peptides and elucidate the amino acid sequence while preserving the attached GlcNAc residue for accurate site assignment. By taking advantage of the recently characterized O-GlcNAc-specific IgG monoclonal antibodies and the combination of HCD and ETD fragmentation techniques, O-GlcNAc modified proteins were enriched from HEK293T cells and subsequently characterized using the LTQ Orbitrap Velos ETD (Thermo Fisher Scientific) mass spectrometer. In our data set, 83 sites of O-GlcNAc modification are reported with high confidence confirming that the HCD/ETD combined approach is amenable to the detection and site assignment of O-GlcNAc modified peptides. Realizing HCD triggered ETD fragmentation on a linear ion trap/Orbitrap platform for more in-depth analysis and application of this technique to other post-translationally modified proteins are currently underway. Furthermore, this report illustrates that the O-GlcNAc transferase appears to demonstrate promiscuity with regards to the hydroxyl-containing amino acid modified in short stretches of primary sequence of the glycosylated polypeptides.
O-GlcNAc proteins:
P121C, MCRI1, ARI1A, TCRG1, MYPT1, HNRDL, SET1A, OGT1, HNRPR, ZN207, DNJA2, ANR17, EIF3G, EIF3J, SC31A, SC24B, TXD12, TBB4A, G3P, S10A8, RLA2, ENOA, NPM, PROF1, SYEP, HNRPC, SP1, VIME, GSTP1, ROA1, H14, THIO, HSP7C, PABP1, ENOB, PO2F1, HNRPL, RS2, RL17, NUCL, RO52, PIMT, SFPQ, EF1B, RS12, DDX6, RL13, ERP29, RL12, PPIF, DNJA1, HSP74, RL22, FUS, NU214, SRP14, NUP62, RBMX, HSPA9, RANG, RL27A, RL5, RL21, RL28, RL29, RL34, SRP09, NU153, TCPD, ROA3, AGFG1, NUP98, SC24C, SEC13, TPIS, RS20, RL26, WDR5, RS7, RS14, RS23, RS11, RL23A, RS6, RAN, RL23, RL31, RL11, RL8, PPIA, YBOX1, EF1A1, TBA1B, RAE1L, RL36A, HNRPU, RL18A, KMT2A, C1QBP, KHDR1, AIMP1, ILF3, ROA0, CBX3, CIRBP, VEZF1, UBP2L, NOLC1, SYK, RBBP5, SC23A, SF01, JHD2C, ELAV1, QSER1, LSM12, UBP39, UBAP2, RBM26, LIN54, NFRKB, NUP54, NUFP2, EMSY, CARM1, ANKH1, CCAR1, SACA3, ASXL1, BAP18, SERB1, FA98A, SMRC2, ATX2L, DDX1, HS105, TFG, DDX17, SMRC1, FUBP2, ZC3HA, CIC, NUP88, ATX2, ROAA, DIDO1, NUP58, WNK3, TBL1R, WNK1, DMAP1, DDX21, BCLF1, CDK12, KANL3, ASH2L, NUP50, YETS2, RTRAF, RUVB2, RUVB1, AT8A1, STRAP, RTCB, WNK2, PRC2C, S23IP
Species: Homo sapiens
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