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Liu Y, Chen Q, Zhang N, Zhang K, Dou T, Cao Y, Liu Y, Li K, Hao X, Xie X, Li W, Ren Y, Zhang J. Proteomic profiling and genome-wide mapping of O-GlcNAc chromatin-associated proteins reveal an O-GlcNAc-regulated genotoxic stress response. Nature communications 2020 11(1) 33214551
Abstract:
O-GlcNAc modification plays critical roles in regulating the stress response program and cellular homeostasis. However, systematic and multi-omics studies on the O-GlcNAc regulated mechanism have been limited. Here, comprehensive data are obtained by a chemical reporter-based method to survey O-GlcNAc function in human breast cancer cells stimulated with the genotoxic agent adriamycin. We identify 875 genotoxic stress-induced O-GlcNAc chromatin-associated proteins (OCPs), including 88 O-GlcNAc chromatin-associated transcription factors and cofactors (OCTFs), subsequently map their genomic loci, and construct a comprehensive transcriptional reprogramming network. Notably, genotoxicity-induced O-GlcNAc enhances the genome-wide interactions of OCPs with chromatin. The dynamic binding switch of hundreds of OCPs from enhancers to promoters is identified as a crucial feature in the specific transcriptional activation of genes involved in the adaptation of cancer cells to genotoxic stress. The OCTF nuclear factor erythroid 2-related factor-1 (NRF1) is found to be a key response regulator in O-GlcNAc-modulated cellular homeostasis. These results provide a valuable clue suggesting that OCPs act as stress sensors by regulating the expression of various genes to protect cancer cells from genotoxic stress.
O-GlcNAc proteins:
RBM47, SBNO1, CNOT1, RGPD3, P121C, PDLI1, MYO1C, AIP, PSD11, PGRC1, TAF4, CLIC1, IPO5, IF2B3, AGRIN, PLOD2, HMGN4, IMA4, PESC, NOP56, DDX3X, PODXL, IMA3, NFIB, ARI1A, G3PT, PDCD5, TCRG1, PSA7, SCAM3, HGS, MYPT1, HNRDL, XPO1, ZN609, SC16A, SR140, SET1A, NPC1, TBX3, ARC1B, TIF1A, PGRC2, PFD6, NKRF, ZN185, OGT1, HMGB3, PPM1G, EIF3D, IPO8, RPA34, NUP42, DHX15, PRP4, SERA, PSMD3, RFOX2, PAPS1, MCA3, HNRPR, PRPF3, TPD54, IF4G3, KLF4, E41L2, DENR, XPOT, PRC1, ZN207, GET3, BUB3, ACTN4, BUD23, SYNC, KRT86, CPSF5, U3IP2, CALU, SAHH2, MED14, SMCA5, ZN862, GANP, KDM1A, ACSL4, SNX3, OGA, HNRPQ, PLOD3, MAFK, IMA7, UGDH, PQBP1, DKC1, IF2P, EDF1, DNJA2, BRD4, PFD1, WDR1, CPNE3, ZC11A, CLU, T22D2, PP6R2, CREST, ANR17, PDCD6, TBCA, H2AY, FLNB, NCOR1, SC22B, PR40A, PSIP1, SRS10, SF3B1, CSDE1, NPM3, U520, NU155, WDHD1, CRTAP, IDHC, CCNK, PIAS2, SPF27, DNJC8, RL1D1, SRP72, MTA2, TOM70, TOX4, SC24D, SUN1, NFAT5, AP2A2, SC31A, SEM3D, AGFG2, ZRAB2, LC7L3, LYPD3, FKBP9, SMC2, IPO7, AHSA1, PSMG1, SC24A, SC24B, CNOT4, OXSR1, HS74L, AP2A1, BAG3, CLPT1, ACL6A, LDHA, AATM, EGFR, PGK1, ASSY, LDLR, K1C14, LMNA, APOA2, FINC, ALBU, TFR1, PROC, ALDOA, CYTB, ANXA1, GCR, KITH, THY1, K2C1, G3P, HSPB1, RPN1, GNAI2, AT1A1, AT1B1, ADT2, IF2A, HMGN2, ICAM1, RLA2, JUN, LA, ITB1, K1C18, K2C8, CDK1, ATPB, S10A6, ENOA, PYGL, G6PI, NPM, TPM3, ITAV, ACBP, LDHB, PDIA1, H10, CATD, ANXA2, TBB5, PROF1, SYEP, HS90A, HNRPC, TSP1, SP1, ANXA6, RHOC, DAF, MDR1, 4F2, HS90B, SRPRA, ASNS, CY1, RU17, ITA5, NFIC, VIME, RS17, K2C7, ANXA5, K1C16, RSSA, SNRPA, GSTP1, LEG1, HMGB1, TPM1, ROA1, RU2A, PARP1, PPBI, UCHL1, ALDOC, ATX1L, HS71B, CALM3, RO60, H14, PTPRF, THIO, ESTD, CH60, BIP, HSP7C, LAMP1, TOP1, TOP2A, PYC, C1TC, MPRI, ADHX, PABP1, PCNA, HARS1, IMDH2, TPR, KCRB, ACTN1, XRCC6, XRCC5, RINI, EF2, K1C10, K2C5, PDIA4, P4HA1, PLST, T2FB, CD59, MIF, GLU2B, CBPM, AK1A1, KPYM, ENPL, CCNB1, PO2F1, HNRPL, SYDC, PLAK, ALDR, AMPN, ERF3A, EZRI, FOSL1, FOSL2, MCP, NQO1, GNS, ZEP1, RS2, DESP, MUC1, CD44, CBR1, CREB1, H15, H13, H12, NCPR, AT2A2, CD36, STMN1, HSP76, HMGA1, JUNB, UBF1, JUND, ATF7, CEBPB, PYRG1, DDX5, PFKAL, LEG3, TCPA, PTN1, RL35A, RL7, VINC, SON, RL17, PGAM1, RCC1, ATF1, ML12A, NUCL, SPEE, RXRA, NFKB1, IF2B, ANXA7, BTF3, PSB1, MPRD, LMNB1, CSRP1, FLNA, 5NTD, VDAC1, CD9, TGM2, PIMT, FBRL, PUR2, PUR6, UBA1, NDKB, ROA2, RFX1, CBL, TCEA1, ITA6, SFPQ, PPIB, SYWC, RS3, NFYA, SAHH, COF1, IF4B, KTHY, EF1B, PPAC, CDK2, MCM3, RS12, BRD2, DNJB1, ATPA, PSA1, PSA3, PSA4, S100P, ITA3, MOES, DDX6, DNMT1, PAX6, U2AF2, RL13, S10A4, HMGB2, PTBP1, SYTC, SYVC, EF1G, STOM, 1433T, ARNT, RL10, RFA1, APEX1, PYR1, CALR, MAP4, CALX, TEAD1, GRN, EPHA2, 3MG, TKT, RBMS1, PML, EF1D, ERP29, PRDX6, RL12, KCY, PEBP1, PDIA3, 2AAA, NMT1, PURA2, UFO, SORCN, ILEU, RPB2, METK2, TIA1, ZEP2, DNJA1, PUR9, HNRH3, HNRH1, 1433B, 1433S, STIP1, S10AB, L1CAM, PRDX2, CDD, ELF1, RL9, CD70, KINH, CSTF2, MCM4, MCM5, MCM7, GLYM, HSP74, PROF2, PHB, SPB6, RFC4, RL22, K1C9, MYH9, MYH10, COPB2, BASI, FUS, NU214, DEK, K22E, PRS7, ATPG, RL4, PP1G, GNL1, SRP14, NUP62, TAGL2, TALDO, RBMX, VKGC, GRP75, IF4A3, RS19, RL3, OST48, FEN1, CAPG, TXLNA, TCPZ, RL13A, STAT3, MDHC, MDHM, IF2G, GARS, SYIC, LAP2A, LAP2B, STAT1, MTREX, RS27, LPPRC, RL35, CDN2A, ECE1, LIS1, MUC18, MATR3, MSH2, SSRA, RANG, VDAC2, CBX5, UBP5, KI67, RAGP1, RECQ1, NOP2, BAG6, NOTC1, RL27A, RL5, RL21, RL28, RS9, RS5, RS10, IQGA1, CAPZB, IF1AX, RL29, SOX9, COPD, GSH0, PSMD8, PRC2A, TCPE, PTSS1, K2C6C, AGRE5, PAXI, RL34, LMAN1, NASP, FAS, CDK8, TCPG, EFTU, SYAC, SYSC, MCM2, ACADV, YLPM1, TMEDA, RBM25, HINT1, NU153, RBP2, TAF6, GUAA, CRIP1, GDIB, EMD, SERPH, F10A1, MAP2, RL14, TCPQ, TCPD, ANX11, PAPOA, FXR1, FXR2, RAB7A, SMCA4, SSRD, HCFC1, HDGF, ROA3, 6PGD, HNRPM, IMA1, GDIR1, AGFG1, HNRPF, MSH6, CAZA1, CRIP2, NUP98, ACLY, COPA, SC24C, TCP4, SYRC, ATX1, ATN1, SYYC, UBP14, AT1B3, RD23B, SNAA, IF5, PSMD4, XPO2, TERA, AF10, AF17, NP1L1, ADK, DSRAD, SEC13, NH2L1, PSA, EIF3B, SYMC, IF6, CTBP2, TMM33, NU107, EPIPL, TPIS, EIF3E, SC61B, MYL6, ACTB, IF4A1, RS20, PRPS1, PSA6, S10AA, CDC42, DEST, RAB10, UBC12, UBE2N, ARP3, ABCE1, RS3A, RL26, PSME3, RL15, RL27, RL37A, S61A1, PFD3, B2MG, DAD1, SUMO2, WDR5, NTF2, HNRPK, 1433G, RS7, PP1A, PP1B, RS8, RS15A, RS16, 1433E, RS14, RS23, RS18, RS29, RS13, RS11, RUXE, SMD1, SMD2, SMD3, PRS10, RL7A, ERF1, CNBP, RS4X, RL23A, RS6, H4, RAN, RL23, RAP1A, RS24, RS25, RS26, RS30, GBB2, RL30, RL31, RL10A, RL32, RL11, RL8, PPIA, FKB1A, RS27A, TRA2B, AP2B1, 1433Z, RSMN, SUMO1, DYL1, RL38, RS21, RACK1, UBC9, YBOX1, CSK2B, TPM4, EF1A1, ACTS, TBA1B, TBA4A, TBB4B, CSK21, PA1B2, HBB, HBA, PITX1, GTF2I, PHC1, TCPB, RAE1L, PRKDC, SARNP, RL24, ARF1, ERH, RL19, SRSF3, FOXK1, DAB2, EFNB1, RBM10, RBM3, CYC, MPCP, VIGLN, CLH1, FKBP3, HNRPU, U2AF1, SPTB2, TIAR, SRSF2, FOXK2, RUNX1, FABP5, LAT1, TFAP4, OTUD4, PFKAP, XPC, EWS, MEF2A, SP3, H11, RL18A, FKBP4, PLOD1, RL6, M2OM, DYST, KMT2A, LMNB2, TF65, UBXN1, GLGB, IF4G1, K1C17, TLE3, REL, 1433F, PLP2, CSTF1, SRS11, EF1A2, SUH, GABPA, PAX8, FMR1, PRDX1, RL18, CKAP4, KHDR1, LRP1, SRSF1, DHX9, LG3BP, PPID, SSRP1, NSUN2, RBBP4, EP300, AHNK, HSP7E, GALT2, BST2, NU160, TBL3, ASPH, TROAP, BPTF, NFIA, SF3A3, AIMP1, ILF2, ILF3, LMAN2, TRAP1, FOXC1, MYO1E, CSTF3, ECH1, ACACA, CAF1B, RED, MTAP, TADBP, ROA0, PRDX4, CBX3, PSMD2, GPS2, SRSF9, SRSF5, SRSF6, TIF1B, G3BP1, PTK7, PABP4, EIF3I, TCOF, SF3B2, HAP28, FKBP5, SMAD4, PICAL, TBB3, PRP4B, PIN1, RIPK1, HDAC1, DCTN2, SNW1, TRA2A, CUL4B, DYR1A, TPBG, FHL1, MOGS, CD166, SPTN1, DX39B, TBB2A, KLF5, BYST, RUNX2, CDK13, CKAP5, CIRBP, HNRPD, SCRB2, DAG1, VEZF1, DSG2, EIF3A, UBP2L, SCRIB, TTL12, FHL2, DPYL3, DYHC1, IF4A2, SRC8, TRI25, FLNC, FA50A, CAPR1, RBM39, MCM6, ITPR1, PUM1, MDC1, EPN4, SMC1A, RRP1B, NCOA6, GSE1, UBP10, GANAB, LBR, MEF2D, CHD4, LASP1, ZN638, IMB1, NOLC1, NUMA1, SEPT2, SART3, CND1, ACAP1, U5S1, SYK, IF4H, PDIA6, PLEC, NOMO1, PON2, IPYR, TEBP, NONO, PWP2, RNPS1, PCBP1, PCBP2, SF3B3, KS6A1, SAFB1, SF3A2, RBMS2, SC23A, SC23B, SF3A1, SSXT, NCOA2, TRAM1, SF01, MED1, HMGN3, JHD2C, TRIP6, MARE1, ELAV1, ELF2, TAB1, AAAT, TOM34, UB2V2, NEDD8, ZYX, SEPT7, ADRM1, UAP1, PSMD5, DDB1, CDC37, DPYL2, RBBP7, TAF9, SRSF7, CPSF6, NRF1, FSCN1, IF16, KYNU, H2A2C, H2B2E, TRXR1, HNRL2, PDS5A, QSER1, TSR1, SMU1, P3H1, LSM12, CRTC2, GLE1, H90B2, ZN326, BCORL, TGO1, PRC2B, RRP12, TOIP1, PCID2, NU188, HP1B3, CE170, ZN362, ZC3HD, LRIF1, UBR4, UBAP2, KPRP, RBM26, AHDC1, CROCC, RPRD2, ECM29, MBNL2, ZMYM4, AR6P4, STEA4, ARID2, BICRL, CPIN1, LIN54, TM214, CAVN1, CDC73, EDC4, PRP8, SCYL2, GOLM2, NFRKB, NCEH1, MDEAS, ZC3HE, LARP1, FIP1, CRTC3, SAS6, CSPG4, WDR82, MCAF1, PACS1, SRCAP, RIPR1, UBN2, FBX50, IKIP, H32, LARP4, H2AV, RS27L, HAKAI, SPT6H, SND1, DDX46, BZW1, CYFP1, KDM3B, PHF5A, ZCCHV, NUP54, POGZ, NUFP2, HEAT3, EMSY, RAI1, I2BP2, RBBP6, SH3R1, HUWE1, YTHD3, KHDC4, CENPV, KAISO, MYPN, PEG10, PABP2, KTN1, THOC4, GP180, CAND1, CARM1, PRSR1, DDX42, DAAF5, P66A, RB6I2, CHERP, ANKH1, CCAR1, RAVR1, SPB1, SMAP1, PHAR4, MAML2, PORIM, CCAR2, NUP93, LRC47, MT1M, FNBP4, CPSF7, PR38A, GT251, TXND5, PAIRB, FA98A, TNR6A, PHC3, ABCF1, VP37A, NUP43, NUP37, NUP35, RLA0L, THOC2, WDR36, SMRC2, PUM2, SPP2A, ALMS1, C99L2, DDX54, DLG5, BRX1, DOT1L, PO210, GEMI5, ZN384, SCRB1, ZC3HF, NU133, PDC6I, NUDC2, GLMP, LMO7, ATX2L, PALLD, PSPC1, P66B, DNJC9, ELYS, DDX1, H1X, NICA, TM131, MAML1, HS105, CNOT9, ZN592, LAR4B, GCN1, NU205, TFG, TAF4B, STAM1, CBP, RBP56, DDX17, CELF1, OSTF1, RENT1, SMRC1, SMRD2, FUBP2, TNPO1, NEP1, UBP7, STMN2, LPP, MED12, H2A1C, SMCE1, RL36L, NCLN, FERM2, FUBP1, LRC59, FKB10, PF21A, INT12, FWCH2, AP2M1, REPS1, CMBL, SNR40, SEH1, DAZP1, RBM33, S10AG, OTUB1, HMCES, DDX27, P121A, PDLI5, FUBP3, WNK4, CHAP1, ZC3HA, CLP1L, CNDP2, ZFR, EP400, PRRC1, NOL4L, RBM14, QKI, PLIN4, S38A2, VPS35, CIC, MED15, MCCA, WRIP1, STRBP, TM209, SIN3A, MINT, UHRF1, HTF4, CDC5L, PFD5, RING2, EYA3, NUP88, POP1, MNT, SCAFB, EIF3C, DNJC7, PHB2, ATX2, ROAA, NP1L4, TS101, CPNE1, TCPH, EBP2, ANM1, H2B1M, RNZ2, TBA1C, MBB1A, TXD17, ERP44, ESYT1, WAC, DIDO1, AN32E, TMM43, TBB6, HNRL1, DDX23, TBB2B, TM109, TMED9, NUP58, GNL3, KIFC1, NUP85, RBM4, NAA15, SRRT, PDIP3, YTHD1, WNK3, NOG1, UNK, SLIRP, IF5A2, NAT10, ILKAP, XRN2, SP130, RGAP1, DDX47, I2BPL, PININ, BOLA2, PTN23, WNK1, FA83D, ZHX3, STEEP, RPF2, ZN703, GORS2, JUPI2, MLXIP, CYBP, RC3H2, TENS1, EMAL4, NCOA5, TNR6C, CHD8, APMAP, ENY2, CD320, UBN1, DCP1A, LUC7L, RTN4, RPR1B, NIT2, ANLN, PDLI7, DDX21, SIAS, SHLB2, MBNL1, OSTC, RAB6B, PHP14, SYFB, RBM12, DD19A, LYAR, CARF, BCLF1, TAB2, TMOD3, CDK12, IF2B1, MAT2B, MYOF, ITSN2, BICRA, CNOT2, SEP10, RCC2, BCCIP, RRBP1, RBM27, KANL3, ATX10, MRC2, SAE2, NXF1, ABCF2, TES, TCF20, SUN2, LIMA1, CHRD1, SEPT9, UBQL2, S30BP, MED13, PFD2, PUF60, XPO7, SIX4, DDX41, CCNL1, JUPI1, MRT4, GPTC8, NUDT5, RALY, ACINU, AGO2, NUP50, ZHX1, CDV3, TRPC5, MRTFB, ZMIZ1, YETS2, HECD1, PKCB1, COR1C, TPX2, AKP8L, PRP19, UBQL1, G3BP2, CHIP, PACN2, SSRG, EPCR, SCAF8, TRI33, SRRM2, PA2G4, CD11A, SMC3, RTRAF, RUVB2, EIF3L, RUVB1, NUDC, SYFA, DRG1, E41L3, RRP44, TR150, WBP11, NOP58, ZN281, SGT1, NOSIP, LSM2, LC7L2, SBDS, STRAP, RTCB, NOC2L, RL36, CHTOP, TLN1, ARIP4, HYOU1, PRC2C, PPME1, YTHD2, SP16H, TNPO3, SRPRB, RBM8A, ZN706, NCOR2, NPTN, COPG1, CLIC4, MD1L1, BZW2, IF2B2, SCC4, ZHX2, S23IP
Species: Homo sapiens
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Yang Y, Fu M, Li MD, Zhang K, Zhang B, Wang S, Liu Y, Ni W, Ong Q, Mi J, Yang X. O-GlcNAc transferase inhibits visceral fat lipolysis and promotes diet-induced obesity. Nature communications 2020 11(1) 31924761
Abstract:
Excessive visceral fat accumulation is a primary risk factor for metabolically unhealthy obesity and related diseases. The visceral fat is highly susceptible to the availability of external nutrients. Nutrient flux into the hexosamine biosynthetic pathway leads to protein posttranslational modification by O-linked β-N-acetylglucosamine (O-GlcNAc) moieties. O-GlcNAc transferase (OGT) is responsible for the addition of GlcNAc moieties to target proteins. Here, we report that inducible deletion of adipose OGT causes a rapid visceral fat loss by specifically promoting lipolysis in visceral fat. Mechanistically, visceral fat maintains a high level of O-GlcNAcylation during fasting. Loss of OGT decreases O-GlcNAcylation of lipid droplet-associated perilipin 1 (PLIN1), which leads to elevated PLIN1 phosphorylation and enhanced lipolysis. Moreover, adipose OGT overexpression inhibits lipolysis and promotes diet-induced obesity. These findings establish an essential role for OGT in adipose tissue homeostasis and indicate a unique potential for targeting O-GlcNAc signaling in the treatment of obesity.
O-GlcNAc proteins:
PLIN1
Species: Mus musculus
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Yang Y, Li X, Luan HH, Zhang B, Zhang K, Nam JH, Li Z, Fu M, Munk A, Zhang D, Wang S, Liu Y, Albuquerque JP, Ong Q, Li R, Wang Q, Robert ME, Perry RJ, Chung D, Shulman GI, Yang X. OGT suppresses S6K1-mediated macrophage inflammation and metabolic disturbance. Proceedings of the National Academy of Sciences of the United States of America 2020 117(28) 32601203
Abstract:
Enhanced inflammation is believed to contribute to overnutrition-induced metabolic disturbance. Nutrient flux has also been shown to be essential for immune cell activation. Here, we report an unexpected role of nutrient-sensing O-linked β-N-acetylglucosamine (O-GlcNAc) signaling in suppressing macrophage proinflammatory activation and preventing diet-induced metabolic dysfunction. Overnutrition stimulates an increase in O-GlcNAc signaling in macrophages. O-GlcNAc signaling is down-regulated during macrophage proinflammatory activation. Suppressing O-GlcNAc signaling by O-GlcNAc transferase (OGT) knockout enhances macrophage proinflammatory polarization, promotes adipose tissue inflammation and lipolysis, increases lipid accumulation in peripheral tissues, and exacerbates tissue-specific and whole-body insulin resistance in high-fat-diet-induced obese mice. OGT inhibits macrophage proinflammatory activation by catalyzing ribosomal protein S6 kinase beta-1 (S6K1) O-GlcNAcylation and suppressing S6K1 phosphorylation and mTORC1 signaling. These findings thus identify macrophage O-GlcNAc signaling as a homeostatic mechanism maintaining whole-body metabolism under overnutrition.
O-GlcNAc proteins:
KS6B1, KS6B1
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Singh JP, Qian K, Lee JS, Zhou J, Han X, Zhang B, Ong Q, Ni W, Jiang M, Ruan HB, Li MD, Zhang K, Ding Z, Lee P, Singh K, Wu J, Herzog RI, Kaech S, Wendel HG, Yates JR 3rd, Han W, Sherwin RS, Nie Y, Yang X. O-GlcNAcase targets pyruvate kinase M2 to regulate tumor growth. Oncogene 2020 39(3) 31501520
Abstract:
Cancer cells are known to adopt aerobic glycolysis in order to fuel tumor growth, but the molecular basis of this metabolic shift remains largely undefined. O-GlcNAcase (OGA) is an enzyme harboring O-linked β-N-acetylglucosamine (O-GlcNAc) hydrolase and cryptic lysine acetyltransferase activities. Here, we report that OGA is upregulated in a wide range of human cancers and drives aerobic glycolysis and tumor growth by inhibiting pyruvate kinase M2 (PKM2). PKM2 is dynamically O-GlcNAcylated in response to changes in glucose availability. Under high glucose conditions, PKM2 is a target of OGA-associated acetyltransferase activity, which facilitates O-GlcNAcylation of PKM2 by O-GlcNAc transferase (OGT). O-GlcNAcylation inhibits PKM2 catalytic activity and thereby promotes aerobic glycolysis and tumor growth. These studies define a causative role for OGA in tumor progression and reveal PKM2 O-GlcNAcylation as a metabolic rheostat that mediates exquisite control of aerobic glycolysis.
O-GlcNAc proteins:
KPYM
Species: Homo sapiens
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Li Y, Wang L, Liu J, Zhang P, An M, Han C, Li Y, Guan X, Zhang K. O-GlcNAcylation modulates Bmi-1 protein stability and potential oncogenic function in prostate cancer. Oncogene 2017 36(45) 28714959
Abstract:
The Polycomb group transcriptional repressor Bmi-1 often overexpressed and participated in stem cells self-renewal and tumorigenesis initiating of prostate cancer. In this progression, Bmi-1 protein was regulated by transcription and post-translational modifications (PTMs). Nobly, the underlying PTMs regulation of Bmi-1 is poorly known. Here we use co-immunoprecipitation show that in C4-2 cell line, Bmi-1 directly interacted with OGT which is the only known enzyme catalyzed the O-GlcNAcylation in human. Furthermore, we identified that Ser255 is the site for Bmi-1 O-GlcNAcylation, and O-GlcNAcylation promoted Bmi-1 protein stability and its oncogenic activity. Finally, microarray analysis has characterized potential oncogenes associated pathway subject to repression via the OGT-Bmi-1 axis. Taken together, these results indicate that OGT-mediated O-GlcNAcylation at Ser255 stabilizes Bmi-1 and hence inhibits the TP53, PTEN and CDKN1A/CDKN2A pathway. The study not only uncovers a novel functional PTMs of Bmi-1 but also reveals a unique oncogenic role of O-GlcNAcylation in prostate cancer.
O-GlcNAc proteins:
BMI1
Species: Homo sapiens
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Ruan HB, Dietrich MO, Liu ZW, Zimmer MR, Li MD, Singh JP, Zhang K, Yin R, Wu J, Horvath TL, Yang X. O-GlcNAc transferase enables AgRP neurons to suppress browning of white fat. Cell 2014 159(2) 25303527
Abstract:
Induction of beige cells causes the browning of white fat and improves energy metabolism. However, the central mechanism that controls adipose tissue browning and its physiological relevance are largely unknown. Here, we demonstrate that fasting and chemical-genetic activation of orexigenic AgRP neurons in the hypothalamus suppress the browning of white fat. O-linked β-N-acetylglucosamine (O-GlcNAc) modification of cytoplasmic and nuclear proteins regulates fundamental cellular processes. The levels of O-GlcNAc transferase (OGT) and O-GlcNAc modification are enriched in AgRP neurons and are elevated by fasting. Genetic ablation of OGT in AgRP neurons inhibits neuronal excitability through the voltage-dependent potassium channel, promotes white adipose tissue browning, and protects mice against diet-induced obesity and insulin resistance. These data reveal adipose tissue browning as a highly dynamic physiological process under central control, in which O-GlcNAc signaling in AgRP neurons is essential for suppressing thermogenesis to conserve energy in response to fasting.
O-GlcNAc proteins:
KCNQ3
Species: Homo sapiens
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