REFERENCES



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Wu JL, Chiang MF, Hsu PH, Tsai DY, Hung KH, Wang YH, Angata T, Lin KI. O-GlcNAcylation is required for B cell homeostasis and antibody responses. Nature communications 2017 8(1) 29187734
Abstract:
O-linked N-acetylglucosamine (O-GlcNAc) transferase (Ogt) catalyzes O-GlcNAc modification. O-GlcNAcylation is increased after cross-linking of the B-cell receptor (BCR), but the physiological function of this reaction is unknown. Here we show that lack of Ogt in B-cell development not only causes severe defects in the activation of BCR signaling, but also perturbs B-cell homeostasis by enhancing apoptosis of mature B cells, partly as a result of impaired response to B-cell activating factor. O-GlcNAcylation of Lyn at serine 19 is crucial for efficient Lyn activation and Syk interaction in BCR-mediated B-cell activation and expansion. Ogt deficiency in germinal center (GC) B cells also results in enhanced apoptosis of GC B cells and memory B cells in an immune response, consequently causing a reduction of antibody levels. Together, these results demonstrate that B cells rely on O-GlcNAcylation to maintain homeostasis, transduce BCR-mediated activation signals and activate humoral immunity.
O-GlcNAc proteins:
FAIM3, K1109, BCORL, M3K15, KANL3, EXC6B, PLHD1, CTTB2, MYO1E, SCLT1, TAF4B, TCOF, FLOT1, OXLA, HDAC1, SYPL1, SEM4D, MA2B1, PPE2, PLD3, DPOD2, NOCT, HNRH1, API5, DFFA, DHX9, MMP8, DPM1, EIF3D, ESS2, CTNL1, VTI1B, S28A2, FA5, CO4B, IGKC, LAC1, IGHA, IGHDM, HA11, LAMC1, TBA1B, LDHA, HVM51, SPTA1, ZFP1, EGR1, ENPL, RPB1, ITB1, ENV1, 4F2, HS90B, HA2B, HB2A, CD44, BLK, CN37, LAMP2, ZFP37, PTBP1, HB2I, BASI, FAS, EVI2A, MDR1A, BGAL, ITAL, LYN, TLN1, MOES, U2AF2, MAP4, GNA13, RL3, CATG, DPP4, PTN6, HEXA, NKTR, HMGB2, SUH, CEAM1, GTR3, DRG1, RAB5C, CD22, FMR1, VGFR1, GRP75, CAP1, ECI1, FOXK1, STAT1, NKX25, TCPQ, H11, H13, IL12B, CAPZB, RL5, VDR, RET3, ADCY7, VA0D1, AAAT, IMA1, STOM, FUS, NICA, RU2A, EF2, AAAS, RUVB1, ABCE1, DCAF7, HNRPK, 1433G, ACTA, RS6, VATB2, RL23, RL8, PP2BA, RACK1, TBB4B, M4K1, ITPR3, SURF6, ELAV1, EVL, H2B1A, AT8A1, TCPH, TCPB, NXN, TBB5, HNRL2, CREB1, PLAK, 3MG, CO6A1, LG3BP, COE1, CNN2, NSUN2, HMHA1, SNUT2, SMCA4, TPC10, TGRM2, I20L2, LMF1, PUF60, ZSWM8, PRRC1, SC31A, CPZIP, ITAD, ULK4, ITA1, DYHC2, LIN54, JKIP3, GRHL3, MYO1G, SIN3A, IRAG2, SAMH1, KHDR1, LY75, RASA3, NPT2A, CAPR1, ARHG2, PML, IMA5, LAP2B, PRP4B, M4K2, TS101, ARHG1, PLSL, CTNA2, VSX2, CD37, SERA, PCBP2, TIF1B, COCH, NUP62, RALY, UT14A, ARG39, CLH1, ATS16, F120A, NOP58, TEDC2, U520, RRP12, SMHD1, ANO6, TTBK1, CHD4, SARM1, NUP98, RASL2, TNKS1, AT1A2, NFRKB, DDX55, DNA2, H2B1C, CMYA5, GIMA8, CYFP1, SPAG5, HNRPQ, RPF1, MBB1A, PRC2A, ADCY2, MOGS, SDA1, FA98B, WIPI2, TRRAP, XYLT1, WDR82, GNS, ERLN2, S38A9, WASF2, CMC1, NIM1, TBL1R, ZN526, CARF, HES7, UNC80, RBGPR, ECHA, ELMO1, F214B, KMT2C, FLNA, TPC2, RBBP5, POGZ, DOC10, SYFA, SMKZ, COR2A, RBM14, DOCK2, CASP9, RAE1L, NUP88, RPB2, UACA, SYEP, P66A, VPS50, COPA, VWF, TXTP, ZN536, LMBD1, R4RL1, C2D1A, URP2, STX5, GT251, SDHA, PO121, ABLM1, COL12, ALAT1, RORB, PDLI2, ERO1B, CD177, PSPC1, NUP58, STAB2, LRC8C, COX18, MAVS, PLBL1, UN93B, EVI2B, MYH9, ESIP1, VIGLN, PSMD2, HNRL1, CCAR2, SP7, RECQ5, SFXN3, IF4A3, RINI, DDX1, UBAP2, S15A4, DNJC9, MASP2, UXS1, CSCL1, BMP2K, CYRIB, SYDC, C1TC, GLYR1, PDIA6, CIC, S12A6, ATAD3, MYO5A, MCLN1, ABEC3, STML2, SFXN1, PRP19, TARA, MCRS1, RTCB, NDUS5, S12A9, SF3B1, ANR17, NU155, TR34A, BAP1, PRP8, NUDC2, TSN31, RN138, RTRAF, RU2B, YETS4, M2OM, MIC19, SNX2, DDX28, CXXC1, RUSD4, ILF2, CHTOP, LUC7L, DIM1, MCES, SEC13, SP2, NOP56, U2AF1, EF1G, MCEM1, EVPL, PRP4, CMTR1, WWP2, DHB11, PESC, TLR9, IRX6, KRT81, RBP2, AFF4, KAT2B, STK3, NUP50, DDX21, ACINU, SIGIR, ZN207, SLAF1, SON, H2AY, MTA2, SAE1, MYO1C, RUVB2, TRPV2, PFKAP, ARC1B, ASAH1, VAPA, EHD1, IF2G, CLIC1, HNRPC, HNRPF
Species: Mus musculus
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Tong QH, Tao T, Xie LQ, Lu HJ. ELISA-PLA: A novel hybrid platform for the rapid, highly sensitive and specific quantification of proteins and post-translational modifications. Biosensors & bioelectronics 2016 80 26866564
Abstract:
Detection of low-abundance proteins and their post-translational modifications (PTMs) remains a great challenge. A conventional enzyme-linked immunosorbent assay (ELISA) is not sensitive enough to detect low-abundance PTMs and suffers from nonspecific detection. Herein, a rapid, highly sensitive and specific platform integrating ELISA with a proximity ligation assay (PLA), termed ELISA-PLA, was developed. Using ELISA-PLA, the specificity was improved by the simultaneous and proximate recognition of targets through multiple probes, and the sensitivity was significantly improved by rolling circle amplification (RCA). For GFP, the limit of detection (LOD) was decreased by two orders of magnitude compared to that of ELISA. Using site-specific phospho-antibody and pan-specific phospho-antibody, ELISA-PLA was successfully applied to quantify the phosphorylation dynamics of ERK1/2 and the overall tyrosine phosphorylation level of ERK1/2, respectively. ELISA-PLA was also used to quantify the O-GlcNAcylation of AKT, c-Fos, CREB and STAT3, which is faster and more sensitive than the conventional immunoprecipitation and western blotting (IP-WB) method. As a result, the sample consumption of ELISA-PLA was reduced 40-fold compared to IP-WB. Therefore, ELISA-PLA could be a promising platform for the rapid, sensitive and specific detection of proteins and PTMs.
O-GlcNAc proteins:
FOS, AKT1, STAT3, CREB1
Species: Mus musculus
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Rexach JE, Clark PM, Mason DE, Neve RL, Peters EC, Hsieh-Wilson LC. Dynamic O-GlcNAc modification regulates CREB-mediated gene expression and memory formation. Nature chemical biology 2012 8(3) 22267118
Abstract:
The transcription factor cyclic AMP-response element binding protein (CREB) is a key regulator of many neuronal processes, including brain development, circadian rhythm and long-term memory. Studies of CREB have focused on its phosphorylation, although the diversity of CREB functions in the brain suggests additional forms of regulation. Here we expand on a chemoenzymatic strategy for quantifying glycosylation stoichiometries to characterize the functional roles of CREB glycosylation in neurons. We show that CREB is dynamically modified with an O-linked β-N-acetyl-D-glucosamine sugar in response to neuronal activity and that glycosylation represses CREB-dependent transcription by impairing its association with CREB-regulated transcription coactivator (CRTC; also known as transducer of regulated CREB activity). Blocking glycosylation of CREB alters cellular function and behavioral plasticity, enhancing both axonal and dendritic growth and long-term memory consolidation. Our findings demonstrate a new role for O-glycosylation in memory formation and provide a mechanistic understanding of how glycosylation contributes to critical neuronal functions. Moreover, we identify a previously unknown mechanism for the regulation of activity-dependent gene expression, neural development and memory.
O-GlcNAc proteins:
CREB1, CREB1
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