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Seo HG, Kim HB, Yoon JY, Kweon TH, Park YS, Kang J, Jung J, Son S, Yi EC, Lee TH, Yang WH, Cho JW. Mutual regulation between OGT and XIAP to control colon cancer cell growth and invasion. Cell death & disease 2020 11(9) 32994395
Abstract:
O-GlcNAc transferase (OGT) is an enzyme that catalyzes the O-GlcNAc modification of nucleocytoplasmic proteins and is highly expressed in many types of cancer. However, the mechanism regulating its expression in cancer cells is not well understood. This study shows that OGT is a substrate of the E3 ubiquitin ligase X-linked inhibitor of apoptosis (XIAP) which plays an important role in cancer pathogenesis. Although LSD2 histone demethylase has already been reported as an E3 ubiquitin ligase in lung cancer cells, we identified XIAP as the main E3 ubiquitin ligase in colon cancer cells. Interestingly, OGT catalyzes the O-GlcNAc modification of XIAP at serine 406 and this modification is required for the E3 ubiquitin ligase activity of XIAP toward specifically OGT. Moreover, O-GlcNAcylation of XIAP suppresses colon cancer cell growth and invasion by promoting the proteasomal degradation of OGT. Therefore, our findings regarding the reciprocal regulation of OGT and XIAP provide a novel molecular mechanism for controlling cancer growth and invasion regulated by OGT and O-GlcNAc modification.
O-GlcNAc proteins:
XIAP
Species: Homo sapiens
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Seo J, Park YS, Kweon TH, Kang J, Son S, Kim HB, Seo YR, Kang MJ, Yi EC, Lee YH, Kim JH, Park B, Yang WH, Cho JW. O-Linked N-Acetylglucosamine Modification of Mitochondrial Antiviral Signaling Protein Regulates Antiviral Signaling by Modulating Its Activity. Frontiers in immunology 2020 11 33603735
Abstract:
Post-translational modifications, including O-GlcNAcylation, play fundamental roles in modulating cellular events, including transcription, signal transduction, and immune signaling. Several molecular targets of O-GlcNAcylation associated with pathogen-induced innate immune responses have been identified; however, the direct regulatory mechanisms linking O-GlcNAcylation with antiviral RIG-I-like receptor signaling are not fully understood. In this study, we found that cellular levels of O-GlcNAcylation decline in response to infection with Sendai virus. We identified a heavily O-GlcNAcylated serine-rich region between amino acids 249-257 of the mitochondrial antiviral signaling protein (MAVS); modification at this site disrupts MAVS aggregation and prevents MAVS-mediated activation and signaling. O-GlcNAcylation of the serine-rich region of MAVS also suppresses its interaction with TRAF3; this prevents IRF3 activation and production of interferon-β. Taken together, these results suggest that O-GlcNAcylation of MAVS may be a master regulatory event that promotes host defense against RNA viruses.
O-GlcNAc proteins:
MAVS
Species: Homo sapiens
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Kim HB, Seo HG, Son S, Choi H, Kim BG, Kweon TH, Kim S, Pai J, Shin I, Yang WH, Cho JW. O-GlcNAcylation of Mef2c regulates myoblast differentiation. Biochemical and biophysical research communications 2020 529(3) 32736694
Abstract:
Unlike other types of glycosylation, O-GlcNAcylation is a single glycosylation which occurs exclusively in the nucleus and cytosol. O-GlcNAcylation underlie metabolic diseases, including diabetes and obesity. Furthermore, O-GlcNAcylation affects different oncogenic processes such as osteoblast differentiation, adipogenesis and hematopoiesis. Emerging evidence suggests that skeletal muscle differentiation is also regulated by O-GlcNAcylation, but the detailed molecular mechanism has not been fully elucidated. In this study, we showed that hyper-O-GlcNAcylation reduced the expression of myogenin, a transcription factor critical for terminal muscle development, in C2C12 myoblasts differentiation by O-GlcNAcylation on Thr9 of myocyte-specific enhancer factor 2c. Furthermore, we showed that O-GlcNAcylation on Mef2c inhibited its DNA binding affinity to myogenin promoter. Taken together, we demonstrated that hyper-O-GlcNAcylation attenuates skeletal muscle differentiation by increased O-GlcNAcylation on Mef2c, which downregulates its DNA binding affinity.
O-GlcNAc proteins:
MEF2C
Species: Mus musculus
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Lee BE, Kim HY, Kim HJ, Jeong H, Kim BG, Lee HE, Lee J, Kim HB, Lee SE, Yang YR, Yi EC, Hanover JA, Myung K, Suh PG, Kwon T, Kim JI. O-GlcNAcylation regulates dopamine neuron function, survival and degeneration in Parkinson disease. Brain : a journal of neurology 2020 143(12) 33300544
Abstract:
The dopamine system in the midbrain is essential for volitional movement, action selection, and reward-related learning. Despite its versatile roles, it contains only a small set of neurons in the brainstem. These dopamine neurons are especially susceptible to Parkinson's disease and prematurely degenerate in the course of disease progression, while the discovery of new therapeutic interventions has been disappointingly unsuccessful. Here, we show that O-GlcNAcylation, an essential post-translational modification in various types of cells, is critical for the physiological function and survival of dopamine neurons. Bidirectional modulation of O-GlcNAcylation importantly regulates dopamine neurons at the molecular, synaptic, cellular, and behavioural levels. Remarkably, genetic and pharmacological upregulation of O-GlcNAcylation mitigates neurodegeneration, synaptic impairments, and motor deficits in an animal model of Parkinson's disease. These findings provide insights into the functional importance of O-GlcNAcylation in the dopamine system, which may be utilized to protect dopamine neurons against Parkinson's disease pathology.
O-GlcNAc proteins:
BIG2, F1712, VIR, AJM1, RPGP1, UBR4, SCN1A, AGRIN, TITIN, KALRN, STPG3, FXL16, TT23L, PTPRS, GRIK3, SCN2A, DLGP4, OSBL8, PTPRZ, PGBD5, GLSK, GCN1, CE350, PI4KA, RYR2, AGRF2, UBE4A, NRX2A, FRY, SYGP1, OTOGL, AT2B1, ANK3, CA2D1, DPYL2, STXB1, DCTN1, U5S1, GFRA2, GALT1, SEM4D, KIF3C, PLCA, PHB2, NCAM2, GRAK, PURB, IMA3, IMA7, PLD3, FOLH1, FKBP8, STX1A, PSDE, VIAAT, AP1B1, C1QBP, SYT3, HNRH1, SATT, CTND2, SDC4, AP3D1, RGS9, RGS7, CSK22, OX2G, AAKG1, CRYM, PROM1, CNTP1, ENTP2, BCKD, SNG1, NIPS1, NIPS2, SEPT7, AT2A2, DHX9, PI51C, PI42A, ITB5, GPX4, NPTX2, GNAZ, WDR1, S4A4, MTX2, CNTFR, ZFR, CSN3, HCN2, HCN1, CTBP1, BSN, MPP3, NOE1, CBPD, LGMN, COR1A, CYB, COX1, COX2, COX3, HPRT, ATP6, THY1, H3C, LAMC1, NU1M, NU2M, NU4M, NU5M, ATP8, GFAP, MBP, PRIO, ALDOA, KAPCA, AATM, TBA1B, TBA3, KIT, LDHA, G6PI, MDR1B, ENPP1, HS90A, ENPL, KCC4, NFL, NFM, RASN, PGK2, ITB1, PPBT, NUCL, PGK1, ACE, LRC4B, UBB, UBC, EF1A1, IF4A2, GSTM1, 4F2, H10, LAMP1, HS90B, L1CAM, ITA5, KCC2A, ITB2, ITPR1, TCPA, PFKAL, CNTN1, NCAM1, AT1B1, C1QB, RS16, RL7, AT1B2, PSMD3, MAP1B, GLNA, CADH2, INSR, NTRK2, KCNC1, SPTB1, H12, KPCE, LDHB, CN37, DDX3L, KCNA1, KCNA3, AMPE, ASSY, SPTN1, G3P, LAMP2, ENOA, AP2A1, AP2A2, HXK1, GTR1, PTPRA, COF1, GNAO, FAS, LAMA1, NFH, COX41, BIP, HEXB, VIME, MTAP2, MAG, GNA11, GNAQ, MDR1A, ACES, GBRG2, AP1G1, GBRD, EIF3A, CXA1, GRIA1, GRIA2, TY3H, RS2, GBRA2, RL3, BRAF, KCC2B, NP1L1, NCKP1, SNAB, KIF2A, KIF3A, PABP1, GBB4, KCRU, GNA14, KAP3, SC6A1, S6A11, MP2K1, GTR3, LA, RASK, SYWC, KIF1A, HYES, RAB3D, RAB5C, RAB6A, RAB21, NMDZ1, ODPA, RET, FBRL, KCNJ2, CD81, GPM6A, GPM6B, GNL1, DYN1, DYN2, GRIK2, CAP1, ABCA2, PURA, HD, EAA2, H14, H15, H13, ITAV, SYT1, NSF, RB11B, AINX, MYO1B, NEDD4, ALDH2, GRM8, CAZA2, CAPZB, MP2K4, PFKAM, RL6, RL29, RL5, GLRB, DCE1, DCE2, CBR1, GSTM5, ADT1, INPP, CDK5, SAHH, GDIA, VATA, VATE1, GBRB1, RAB7A, ACADL, VA0D1, ADT2, EAA3, KCNJ4, KPYM, RAB2A, PRS6B, PTN5, NCAN, ABCD3, RAB8A, ATPK, ATP5E, UBP5, ATPB, CTBP2, EAA1, WFS1, FUS, NICA, ACTN4, ASM3B, EF2, OPA1, DOCK4, IRPL1, ARPC4, MYPR, PLPP, ACTB, MDGA2, NEUG, RAC3, IF4A1, MEGF8, RAB5B, RAB10, RAB8B, ARP2, ACTZ, CSN2, ARF3, ARL1, CAH10, RAP2B, STX1B, RAB6B, RL27, ARF4, GABT, HNRPK, 1433G, RS7, PP1A, RS8, SMD1, KCAB2, ABI2, RB11A, EF1A2, RS4X, PP2AB, RL18A, ACTA, AP2S1, RL23A, VISL1, H4, GBRA1, VATB2, RAB1A, RAB3C, RAN, RAP1A, RS24, GBB1, GBB2, RS3, RL8, RS27A, RL40, RAC1, RAB3A, HSP7C, CH60, VAMP2, NOE3, GBRB3, VATL, PP1G, 1433Z, GBRB2, KCNA2, KCAB1, CRNL1, DYL1, ACTG, ACTH, KPCG, PP2BA, PP2AA, PHB1, CSK2B, ACTC, RACK1, ACTS, KAPCB, TBA4A, TBA1A, TBB4B, KPCB, H31, IMB1, PLXA1, PLXA2, PLXA3, DCC, ITPR3, NCHL1, HNRH2, ELAV1, USP9X, IDHG1, LYAG, AT8A1, TCPH, TCPB, TCPD, TCPE, TCPZ, TCPG, TNIK, WNK1, RL36A, ARF1, ARF5, AP2M1, H32, H33, ADCY5, NPTN, RS3A, AT1B3, DPYL1, ZNT3, GRM1, SHPS1, NEO1, FUMH, M4K4, C1QA, TBB5, PDE4D, PDE1B, NMDE2, SC23A, TERA, C1QC, CTNB1, PLAK, EPHA4, MARK3, ATPA, CHLE, KCND1, KCRB, NF1, CDK18, RAC2, MARK2, PGBM, PTPRG, PYC, KCMA1, PADI2, INF2, TRIO, MDGA1, CTP5A, ITB8, PSA, GRM2, PTCD3, PHAR1, LRFN1, SPP2B, HP1B3, NLRX1, PRC2C, TM38A, VGLU1, BIG3, PLXD1, AGAP2, AAK1, TEN4, CAMKV, DOP2, RMD3, SMU1, MCCB, GPD1L, LIGO2, SRBS2, CDKL5, K22O, VPS51, GRM5, CBAR2, SHAN3, UN13A, SE6L2, KCTD8, KCD16, LRC8B, VP13A, C2C4C, S2551, MRS2, DIRA2, CYFP2, TM1L2, RHG44, MYO1D, RABL6, DJC11, UIMC1, ICAM5, FLOT2, HNRPD, PTPRN, CSK21, KHDR1, IGF1R, CLD11, SPB6, ARHG2, VDAC2, VDAC3, VDAC1, ABCB7, ASTN1, P3C2A, CAC1E, LAMB2, CTNA2, SC6A3, CNTN2, PGCB, NEP, KCNA4, CD166, 5NTD, GSLG1, EWS, AP180, FSCN1, GDIB, GRIK5, GRID1, DDX5, HS105, ITIH3, IL1AP, CD47, KINH, KIF3B, LASP1, MYH10, MOG, NPM, PCBP2, CSPG2, DDX3Y, DLG4, RHOC, DAG1, DDX3X, SYPH, TICN1, NDUA4, NPTX1, NUP62, OMGP, HECAM, AOFA, ARP3B, SURF4, SYN2, CP3AD, H2B1H, GLPK, SDC3, GPDM, H2A2C, H2B2B, GRM7, GRM4, CLH1, K1549, GIT1, PKP4, PPR29, CNTN4, NLGN2, SV2C, THS7A, CE170, UBP7, BRNP2, SCMC3, LIGO3, DGKB, RPRD2, DPP10, S23IP, PPRC1, 2ABA, TNPO3, SIK3, U520, S39AA, TTYH3, XPO1, SPCS, KCRS, CSKI1, NRX3A, BCR, SARM1, PRRT3, TEFF1, RAB35, CA2D2, KCC2D, AT1A3, AT1A2, GNAS1, SDK2, WDFY3, NTRK3, RAD9B, DGLA, KCD12, MTMR5, UBE2O, CAND1, UBP34, RS9, 2ABB, H2B1C, TLN2, CSPG5, 2AAA, NP1L4, MTCH2, OPALI, CYFP1, TBB2A, HUWE1, IGS21, ROBO2, ACTN1, IGSF1, TR143, TPPP, OTUB1, KPBB, PP6R1, MAP6, ELP1, RRAGD, MRCKB, GABR2, CSMD3, EPT1, VAT1L, LRRC7, CAPS1, CYLD, AGRL1, AGRL3, CLAP1, AUXI, DAAM2, MADD, MFN2, NU214, UBE3C, PLXA4, FBX2, KCMF1, CBPM, GSTM7, AGFG2, LRC8A, HPLN4, VAC14, UBP2L, C2C2L, LRRT4, BDH, MK15, CNKR2, TENA, ASTN2, NEGR1, RAP2A, THEM6, SLIK5, SLIK4, SLIK3, SLIK2, NFASC, NRCAM, RHG32, SRGP3, EFTU, VGLU3, ERLN2, ROA3, SV2B, MIRO1, EFR3A, LRRT2, U2AF4, ENPP6, SYAC, FLRT3, CBLN2, LRTM2, HPCL4, COR2B, S2512, ATLA1, NU107, RB39B, RB39A, ZN526, ANS1B, DLGP2, AHSA1, IPO5, NCEH1, LSAMP, CADM2, NOE2, ODP2, RBGPR, ECHA, SPA2L, SYNC, RL24, DAAM1, DMXL2, RLGPB, CLAP2, VMAT2, ARF2, NDRG4, ENPP4, HSDL1, RAP2C, GEPH, VATH, PMGT2, TTC12, AOFB, LRFN5, PIGT, CTL2, TENR, NLGN3, LRRT3, DYN3, LRC4C, ARHGA, SYFA, SI1L1, LCAP, EXOG, CERS6, SEP11, IKZF4, GP158, CWC22, VPS52, SCAI, ANK2, PDE10, PGM2L, SHFL, MIC60, WDR37, ABI1, SYNPO, T132C, GLT13, NED4L, RPB2, TCRG1, GNAL, H2B1K, H2B1P, H2A1F, H2A1H, H2A1K, OGT1, SYNJ1, SEPT8, MBOA7, PGP, NGEF, PYGB, COPA, MARK4, DOCK3, PLXB1, TXTP, AGRL2, TRHDE, R4RL1, RTN1, HS12A, K319L, DNM1L, AGRG1, PACS1, ABCF3, SDHA, HACD3, AGFG1, PAF1, IPO11, CCM2, MATR3, ATAT, LRRT1, LGI3, RPTOR, COL12, NAC2, THIL, EIF3L, MARE2, HNRPL, K0513, IQEC1, CACB4, SCPDL, BPHL, SNG3, EIF3C, H2AJ, DC1L1, S35A3, AP3M2, MUC18, UBQL1, PSPC1, NUP58, IGSF8, EXOC1, CACB1, CADM4, NUP85, SNP47, ACTY, WASF1, AMPB, MICU1, PSMD2, AT1A1, CDIPT, GD1L1, CC50A, HNRPU, REM2, MPCP, MARK1, CSPG4, SORC3, IPO4, SFPQ, BACH, S12A5, RAB14, SFXN3, ACLY, NDUS1, ITM2C, RMXL1, MIC25, ATPG, DDX1, MLP3A, UBAP2, ACSL6, NDUS2, ERLN1, DLG2, PI42C, IPO9, NDUV1, GRHPR, SRGP2, SRGP1, RAB4B, LRP1, WDR7, BRNP1, SYDC, TBB6, PDK3, TSN2, PDE2A, RPAB3, CSMD1, KCC2G, 2ABD, ATAD3, SFXN5, MYO5A, G37L1, RAP1B, SFXN1, NLGN1, NONO, RRAGC, TIP, MLF2, GAK, CDS2, NDUAA, ETFA, TNPO2, PTPRT, DNJA3, T121B, SF3B1, RIMS1, CNTP4, NTRI, PRP8, COX6C, MGST3, CNTP2, 6PGL, QCR8, NDUB4, RAB5A, GLRX3, AT5F1, S2546, MLP3B, 1433B, RL14, M2OM, UCRI, MIC19, PRPS2, NRX1A, MICU3, ARPC2, TBB2B, ROA0, CENPV, RL11, ILF2, TECR, RN181, BIEA, QCR1, OLA1, RL15, AL1B1, TOM70, MPC2, ODPB, MMS19, MGRN1, HNRPM, SCOT1, DYL2, RM28, RAB1B, LIGO1, RUFY3, MEII1, ATAD1, CUL5, GBRA4, TBB4A, GHC1, IDH3A, PRPS1, U2AF1, RL4, PSD12, SNAA, ATPO, BTBDH, QCR2, ALG2, AP2B1, RPN2, SUSD2, NDUA9, NDUS7, 6PGD, EIF3F, NDUS3, RAB13, XPO7, IPO7, NBEA, SORC2, VPS35, RPGF4, TBB3, XPO2, RTN3, LRBA, SPN90, TRIM2, DYHC1, LRP1B, LGI1, PRAF2, SV2A, SCAM5, NECT1, HYOU1, EXTL1, SORC1, DCLK1, MTOR, MINK1, ZN207, AP3B2, MY18A, RHOA, HPLN1, FAK2, NAGAB, COPG2, KI21A, SHRM3, PLEC, DREB, S2513, EHD3, PLXB3, ADDA, DNJA2, GRM3, PCLO, SIA7A, ARP10, DCTN5, PLXC1, COPG1, GPC1, UBQL2, FBX6, SRR, AT2B2, CELR2, DEST, ARC1A, KAD1, GBRG1, GUAD, CBLN1, DGKE, VAS1, ADA22, ADA23, PEPL, CAD13, TEN1, TEN2, CUL1, ATRN, GLPK2, PDC6I, PFKAP, PYGM, SUCA, RBMX, GABR1, GSK3B, FPRP, E41L3, BUB3, CARM1, PSD13, CP46A, APC7, NCDN, ITB6, KCND2, NU160, HNRDL, SAE2, VATC1, VPP1, ARI1, CA2D3, SEPT3, AP3B1, STK39, HNRPC, DPP6, E41L1, SUCB1, SEPT5, GRIA4, GRIA3, HOME1
Species: Mus musculus
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Seo HG, Kim HB, Kang MJ, Ryum JH, Yi EC, Cho JW. Identification of the nuclear localisation signal of O-GlcNAc transferase and its nuclear import regulation. Scientific reports 2016 6 27713473
Abstract:
Nucleocytoplasmic O-GlcNAc transferase (OGT) attaches a single GlcNAc to hydroxyl groups of serine and threonine residues. Although the cellular localisation of OGT is important to regulate a variety of cellular processes, the molecular mechanisms regulating the nuclear localisation of OGT is unclear. Here, we characterised three amino acids (DFP; residues 451-453) as the nuclear localisation signal of OGT and demonstrated that this motif mediated the nuclear import of non-diffusible β-galactosidase. OGT bound the importin α5 protein, and this association was abolished when the DFP motif of OGT was mutated or deleted. We also revealed that O-GlcNAcylation of Ser389, which resides in the tetratricopeptide repeats, plays an important role in the nuclear localisation of OGT. Our findings may explain how OGT, which possesses a NLS, exists in the nucleus and cytosol simultaneously.
O-GlcNAc proteins:
OGT1
Species: Homo sapiens
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