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Chen Y, Tang F, Qin H, Yue X, Nie Y, Huang W, Ye M. Endo-M Mediated Chemoenzymatic Approach Enables Reversible Glycopeptide Labeling for O-GlcNAcylation Analysis. Angewandte Chemie (International ed. in English) 2022 61(23) 35289036
Abstract:
To selectively enrich O-linked β-N-acetylglucosamine (O-GlcNAc) peptides in their original form from complex samples, we report the first reversible chemoenzymatic labeling approach for proteomic analysis. In this strategy, the O-GlcNAc moieties are ligated with long N-glycans using an Endo-M mutant, which enables the enrichment of the labeled glycopeptides by hydrophilic interaction liquid chromatography (HILIC). The attached glycans on the enriched glycopeptides are removed by wild-type Endo-M/S to restore the O-GlcNAc moiety. Compared with classic chemoenzymatic labeling, this approach enables the tag-free identification, and eliminates the interference of bulky tags in glycopeptide detection. This approach presents a unique avenue for the proteome-wide analysis of protein O-GlcNAcylation to promote its mechanism research.
O-GlcNAc proteins:
TM271, HEAT9, SBNO1, P121B, GGT3, TAF4, AGRIN, MEIS1, RNT2, NFIB, MA2B1, CDKA1, ABLM1, ADA10, KMT2D, MYPT1, ZN609, SC16A, PLXB2, SET1A, VA0E1, TNC18, TLR3, TET3, PRPF3, IF4G3, ZN207, AKAP8, CALU, EXTL3, PCDH7, TRAK2, GANP, TSN3, MAFK, KERA, SRGP2, ANR17, NCOR1, U520, CRTAP, ATRN, CBPD, RMP, TOX4, SC24D, SRBS2, SUN1, ERLN2, PCF11, SCAF4, VAPB, SMC2, SC24B, CNOT4, EGFR, HPT, GLHA, LMNA, NU3M, VTNC, GCR, A1BG, K2C1, HSPB1, RPN1, AT1B1, K1C18, K2C8, ITAV, GDN, TRY1, SAP, MET, NFIC, VIME, K2C7, SNRPA, UCRIL, ATX1L, NT2NC, LYAG, LAMC1, PPAL, LAMP1, MPRI, TPR, SKIL, T2FB, GLU2B, NID1, PO2F1, MCP, ZEP1, CD36, ATF7, EGR1, SON, ATF1, ICAL, CO5A1, ASPG, SFPQ, ITA3, NKG2A, ARNT, TEAD1, 3MG, TKT, UFO, HXA11, HXC9, ZEP2, HNRH1, ELF1, CD68, RFC1, FBN1, NU214, RL4, SCNNA, SRP14, NUP62, TAGL2, CUX1, IL6RB, PBX2, STAT3, NBL1, LAP2A, LAP2B, LIFR, PCP, ECE1, MUC18, MATR3, SSRB, VDAC2, ATRX, NOTC1, UTRN, RFX5, HSP13, CCN3, AGRE5, NR2C2, CDK8, CENPF, YLPM1, RBM25, NU153, RBP2, TAF6, EMD, PPT1, SMCA4, HCFC1, AGFG1, NUP98, PTTG, ATX1, AT1B3, AF17, DSRAD, LAMB2, CAD13, ITA1, NU107, TGFB2, ACTG, CXAR, PITX1, CNTP1, ABCA4, PHC1, ADA17, KGD4, SARNP, FOXK1, DAB2, HNRPU, SPTB2, FOXK2, MEF2A, SP3, PLOD1, KMT2A, UPAR, IF4G1, NOTC2, SRS11, SUH, MFGM, AHNK, TMM62, GALT1, BST2, SIA4C, ASPH, BPTF, NFIA, FOXC1, ADAM9, NFAC2, MAMD1, NAB1, TBB3, PKD2, LAMB3, KLF5, NFYC, CDK13, SCRB2, LRP8, VEZF1, UBP2L, LAGE3, MDC1, RRP1B, MEF2D, ARI5B, NUMA1, PON2, RCN1, TAF1C, SF01, MED1, JHD2C, ELF2, TAB1, ZFHX3, ZYX, ADRM1, LAMA4, TAF9, FOXD1, LAMA3, RFX7, QSER1, SVEP1, SYTL3, EPC2, LUZP6, CRTC2, YIF1B, BCORL, K2026, PRC2B, ZN362, LRIF1, UBAP2, RBM26, VP13D, RPRD2, RN220, ZN318, TASO2, ECM29, ARID2, SE1L3, BICRL, SCAR3, NIPBL, LIN54, FSTL4, TET2, ZNT6, GOLM2, NFRKB, S39A4, ZC3HE, FIP1, CRTC3, PLGT2, SUSD1, MCAF1, BCOR, IGS10, B3GLT, CD109, FRRS1, SRCAP, NBEL1, UBN2, RAPH1, HAKAI, ASXL2, SPT6H, KDM3B, NRK, NUP54, POGZ, MAVS, PK1L3, PLGT3, EMSY, RAI1, YTHD3, LDB1, LYRIC, OSTM1, PRSR1, DDX42, P66A, FOXP4, CTL2, TEX2, MGAP, ANKH1, SUGP1, NUP93, PLD6, FNBP4, ARFG1, PMGT2, GOLM1, PGLT1, TM87A, CA131, PHC3, SP20H, ARI1B, NUP35, OR6C4, VA0E2, PLBL2, PUM2, SPP2B, DLG5, GPX8, PO210, ZN384, LMO7, MUC16, P66B, BBX, SMG7, NICA, TM131, PHF3, TAF4B, GGH, GSLG1, FUBP2, LPP, NCLN, TTC17, FKB10, TOM6, PF21A, RBM33, I17RA, P121A, PDLI5, CREL1, FUBP3, TXD15, LOXL4, VCIP1, CHAP1, Z512B, ZFR, EP400, HUTU, RBM14, KI20B, PHF12, PANX1, CIC, MED15, ERBIN, JMJD8, MINT, TEAD3, SEM3C, WAC, DIDO1, HNRL1, TM109, NUP58, M4A8, YTHD1, ULBP3, AMRA1, TANC1, TWSG1, S22A4, SP130, APC1, I2BPL, WNT5B, VP33B, EPC1, ADNP, ZN106, FOXP1, PTN23, WNK1, SIA7D, ZHX3, PIEZ2, SG196, TM231, PEAK1, DOCK5, CF155, CNO10, MLXIP, SIAE, PKHA5, RC3H2, TAF9B, ZBT20, NCOA5, TANC2, ZN532, CELR2, APMAP, ABCB9, CHSTB, UBN1, NECT3, PDLI7, RBM12, OCAD1, CARF, ETAA1, HXC10, TAB2, CELR1, CDK12, CNOT2, CRIM1, TMEM9, RCC2, CHD7, RBM27, KANL3, MRC2, SUCO, TCF20, SUN2, UBQL2, LCAP, GGT7, TASOR, GMEB2, ZHX1, DSE, WWC3, MRTFB, ZBT21, PRR12, YETS2, NOTC3, KMT2B, PRP19, MINP1, SCAF8, ZC3H4, SRRM2, SCML2, UST, ICE1, ZN281, DAAM1, IRS2, PRC2C, NCOR2, NPTN, GMEB1, POMT1, S4A7, S23IP
Species: Homo sapiens
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Isono T. O-GlcNAc-specific antibody CTD110.6 cross-reacts with N-GlcNAc2-modified proteins induced under glucose deprivation. PloS one 2011 6(4) 21526146
Abstract:
Modification of serine and threonine residues in proteins by O-linked β-N-acetylglucosamine (O-GlcNAc) glycosylation is a feature of many cellular responses to the nutritional state and to stress. O-GlcNAc modification is reversibly regulated by O-linked β-N-acetylglucosamine transferase (OGT) and β-D-N-acetylglucosaminase (O-GlcNAcase). O-GlcNAc modification of proteins is dependent on the concentration of uridine 5'-diphospho-N-acetylglucosamine (UDP-GlcNAc), which is a substrate of OGT and is synthesized via the hexosamine biosynthetic pathway. Immunoblot analysis using the O-GlcNAc-specific antibody CTD110.6 has indicated that glucose deprivation increases protein O-GlcNAcylation in some cancer cells. The mechanism of this paradoxical phenomenon has remained unclear. Here we show that the increased glycosylation induced by glucose deprivation and detected by CTD110.6 antibodies is actually modification by N-GlcNAc(2), rather than by O-GlcNAc. We found that this induced glycosylation was not regulated by OGT and O-GlcNAcase, unlike typical O-GlcNAcylation, and it was inhibited by treatment with tunicamycin, an N-glycosylation inhibitor. Proteomics analysis showed that proteins modified by this induced glycosylation were N-GlcNAc(2)-modified glycoproteins. Furthermore, CTD110.6 antibodies reacted with N-GlcNAc(2)-modified glycoproteins produced by a yeast strain with a ts-mutant of ALG1 that could not add a mannose residue to dolichol-PP-GlcNAc(2). Our results demonstrated that N-GlcNAc(2)-modified glycoproteins were induced under glucose deprivation and that they cross-reacted with the O-GlcNAc-specific antibody CTD110.6. We therefore propose that the glycosylation status of proteins previously classified as O-GlcNAc-modified proteins according to their reactivity with CTD110.6 antibodies must be re-examined. We also suggest that the repression of mature N-linked glycoproteins due to increased levels of N-GlcNAc(2)-modified proteins is a newly recognized pathway for effective use of sugar under stress and deprivation conditions. Further research is needed to clarify the physiological and pathological roles of N-GlcNAc(2)-modified proteins.
O-GlcNAc proteins:
4F2, LG3BP, LAMB3, NUP88, HYOU1
Species: Homo sapiens
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