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Wong YK, Wang J, Lim TK, Lin Q, Yap CT, Shen HM. O-GlcNAcylation promotes fatty acid synthase activity under nutritional stress as a pro-survival mechanism in cancer cells. Proteomics 2022 22(9) 35083852
Abstract:
Protein O-GlcNAcylation is a specific form of protein glycosylation that targets a wide range of proteins with important functions. O-GlcNAcylation is known to be deregulated in cancer and has been linked to multiple aspects of cancer pathology. Despite its ubiquity and importance, the current understanding of the role of O-GlcNAcylation in the stress response remains limited. In this study, we performed a quantitative chemical proteomics-based open study of the O-GlcNAcome in HeLa cells, and identified 163 differentially-glycosylated proteins under starvation, involving multiple metabolic pathways. Among them, fatty acid metabolism was found to be targeted and subsequent analysis confirmed that fatty acid synthase (FASN) is O-GlcNAcylated. O-GlcNAcylation led to enhanced de novo fatty acid synthesis (FAS) activity, and fatty acids contributed to the cytoprotective effects of O-GlcNAcylation under starvation. Moreover, dual inhibition of O-GlcNAcylation and FASN displayed a strong synergistic effect in vitro in inducing cell death in cancer cells. Together, the results from this study provide novel insights into the role of O-GlcNAcylation in the nutritional stress response and suggest the potential of combining inhibition of O-GlcNAcylation and FAS in cancer therapy.
O-GlcNAc proteins:
RUXGL, ADAS, DX39A, MYO1C, IPO5, PESC, NOP56, DDX3X, SCD, MGST3, HNRDL, XPO1, SURF4, OGT1, PPM1G, MOT4, DHX15, CYB5B, SERA, HNRPR, BUB3, ACTN4, MYO1B, GANP, HNRPQ, NDUS7, MPU1, H2AY, FLNB, SC22B, SF3B1, U520, UTP20, NU155, ATP5H, RL1D1, MTA2, RTN3, VAPB, IPO7, ACSL3, BAG2, TOM40, LDHA, DHE3, AATM, PGK1, ASSY, LMNA, TFR1, ALDOA, K2C1, G3P, HSPB1, RPN1, AT1A1, ADT2, PCCA, RLA1, RLA0, LA, K1C18, K2C8, ATPB, ENOA, NPM, TPM3, LDHB, PDIA1, ANXA2, TBB5, TRY1, PROF1, SYEP, HS90A, HNRPC, DAF, 4F2, HS90B, ODPA, RU17, VIME, RS17, K2C7, GNAI3, RSSA, LEG1, ROA1, PARP1, PRS56, HS71B, ODP2, THIO, MGST1, CH60, BIP, HSP7C, GTR1, TOP2A, PYC, PABP1, PCNA, ADT3, IMDH2, KCRU, XRCC6, XRCC5, EF2, K1C10, K2C5, PDIA4, PLST, ETFA, MIF, KPYM, ENPL, HNRPL, PLAK, EZRI, NDKA, RS2, DESP, H13, NCPR, AT2A2, DDX5, TCPA, PTN1, ARF4, RL7, RL17, NUCL, GSTM3, FLNA, FBRL, PUR6, UBA1, ROA2, QCR2, SFPQ, PPIB, RS3, SAHH, COF1, MCM3, RS12, ATPA, U2AF2, RL13, S10A4, PTBP1, SYVC, EF1G, STOM, RL10, APEX1, PYR1, CALX, TKT, ERP29, PRDX6, PRDX5, PRDX3, RL12, PDIA3, CPSM, HNRH1, STIP1, L1CAM, PRDX2, P5CR1, DUT, MCM7, GLYM, HSP74, PHB1, RL22, MYH9, SOAT1, DEK, K22E, RL4, LONM, NUP62, GRP75, IF4A3, RL3, RL13A, ARL1, STAT3, MDHM, RFC3, ECHA, SYIC, LAP2A, LPPRC, MATR3, MSH2, GPDM, VDAC2, KI67, BAG6, RL27A, RL5, RS9, STT3A, CAPZB, SYQ, RL29, AT5G3, TCPE, RL34, FAS, TCPG, EFTU, ACADV, TMEDA, NU153, RBP2, CPT1A, SERPH, RL14, TCPQ, TCPD, FXR1, RAB5C, RAB7A, HCFC1, ROA3, 6PGD, HNRPM, IMA1, HNRPF, MSH6, TXTP, ACLY, COPA, MOT1, SYRC, KAD2, P5CS, XPO2, TERA, NP1L1, DSRAD, ATPK, TMM33, TPIS, MYL6, IF4A1, RS20, S10AA, RAP1B, RL15, RL37A, HNRPK, RS8, RS16, 1433E, RS14, RS23, RS11, RUXE, RL7A, RS4X, RS6, H4, RAB1A, RAN, RL23, RS25, RS26, RL10A, RL11, RL8, PPIA, RS27A, RSMN, RACK1, ACTG, UBC9, TBA1B, TBB4B, GTF2I, TCPB, PRKDC, RL24, ARF5, RL19, SRSF3, MPCP, CLH1, HNRPU, SPTB2, EXOSX, RL18A, RL6, IF4G1, K1C17, PRDX1, RL18, C1QBP, KHDR1, DHX9, NCBP1, AHNK, NU160, SF3A3, ILF3, ACACA, PRDX4, CBX3, TIF1B, SPTN1, HNRPD, SAFB2, TTL12, CAPR1, ITPR1, RRP1B, GANAB, LBR, GOGB1, IMB1, NUMA1, SUZ12, U5S1, RRS1, PDIA6, PLEC, TEBP, NONO, PCBP1, PCBP2, DHC24, SF3B3, SF3A1, TRAM1, ELAV1, AAAT, RBBP7, H31T, PDS5A, TSR1, IF2GL, RRP12, NU188, HP1B3, EF1A3, PPR18, PRP8, C1TM, DHX30, CAND1, MISP, SPB1, PELP1, RDH10, CCAR2, TXND5, STT3B, BRX1, PO210, GEMI5, RT27, HS105, GCN1, NU205, AKAP1, AN32B, RBP56, DDX17, FUBP2, TNPO1, UBP7, UTP4, LRC59, PGAM5, FUBP3, MBOA7, MCCA, WRIP1, UHRF1, POP1, HCD2, ROAA, TM9S2, TCPH, ANM1, H2B1L, RNZ2, MEP50, MBB1A, ESYT1, H2AJ, GNL3, HDHD5, GTPB4, API5, RPF2, SFXN1, RDH14, ABCB6, DDX21, MDN1, DCA13, ATD3A, DDX18, MIC19, TEX10, TECR, MYOF, THYN1, HACD3, RRBP1, ABC3B, RLP24, ACINU, OGDHL, COR1C, PRP19, SSRG, TRI33, EIF3L, RUVB1, VDAC3, PDIP2, NOP58, SF3B6, RTCB, RL36, LAS1L, SRPRB, COPG1, MTCH2, CEPT1, ZNT1
Species: Homo sapiens
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Fan Z, Li J, Liu T, Zhang Z, Qin W, Qian X. A new tandem enrichment strategy for the simultaneous profiling of O-GlcNAcylation and phosphorylation in RNA-binding proteome. The Analyst 2021 146(4) 33465208
Abstract:
RNA-protein interactions play important roles in almost every step of the lifetime of RNAs, such as RNA splicing, transporting, localization, translation and degradation. Post-translational modifications, such as O-GlcNAcylation and phosphorylation, and their "cross-talk" (OPCT) are essential to the activity and function regulation of RNA-binding proteins (RBPs). However, due to the extremely low abundance of O-GlcNAcylation and the lack of RBP-targeted enrichment strategies, large-scale simultaneous profiling of O-GlcNAcylation and phosphorylation on RBPs is still a challenging task. In the present study, we developed a tandem enrichment strategy combining metabolic labeling-based RNA tagging for selective purification of RBPs and HILIC-based enrichment for simultaneous O-GlcNAcylation and phosphorylation profiling. Benefiting from the sequence-independent RNA tagging by ethynyluridine (EU) labeling, 1115 RBPs binding to different types of RNAs were successfully enriched and identified by quantitative mass spectrometry (MS) analysis. Further HILIC enrichment on the tryptic-digested RBPs and MS analysis led to the first large-scale identification of O-GlcNAcylation and phosphorylation in the RNA-binding proteome, with 461 O-GlcNAc peptides corresponding to 300 RBPs and 671 phosphopeptides corresponding to 389 RBPs. Interestingly, ∼25% RBPs modified by two PTMs were found to be related to multiple metabolism pathways. This strategy has the advantage of high compatibility with MS and provides peptide-level evidence for the identification of O-GlcNAcylated RBPs. We expect it will support simultaneous mapping of O-GlcNAcylation and phosphorylation on RBPs and facilitate further elucidation of the crucial roles of OPCT in the function regulation of RBPs.
O-GlcNAc proteins:
NACAM, SAP18, PLOD2, NOP56, DDX3X, PLXB2, RRP8, SERA, PSMD3, MCA3, PRPF3, TPD54, TIM44, ACTN4, ACSL4, PLOD3, IF2P, ZC11A, SC22B, PR40A, MPPB, CSDE1, U520, NU155, EIF3G, SPF27, RL1D1, CLPX, RTN3, LC7L3, VAPB, SMC2, AP2A1, WIZ, BAG2, TOM40, ACL6A, EGFR, LMNA, TFR1, FRIH, RPN1, RPN2, ITB1, SYEP, HNRPC, SRPRA, VIME, GNAI3, ANXA5, LAMP1, ACADM, TOP1, TOP2A, PABP1, ADT3, TPR, EF2, PDIA4, FPPS, ENPL, ALDR, NDKA, RS2, UBF1, ARF4, NUCL, RAB6A, PSB1, FLNA, SDHB, UBA1, NDKB, ITA6, SFPQ, IF4B, AT2B4, THIL, RS12, PSA4, SYVC, 1433T, MAP4, PSA5, PSB4, NDUS1, ECHM, KCY, AMRP, SDHA, METK2, CPSM, PUR9, HNRH1, 1433S, STIP1, P5CR1, MCM4, HSP74, CTNA1, MYH9, DEK, RL4, SPB5, NUP62, RBMX, TCPZ, ECE1, PRS6B, KI67, RAGP1, ATRX, SYQ, LMAN1, NASP, FAS, AL7A1, SYSC, MCM2, ACADV, NU153, RBP2, DNLI3, MRE11, CPT1A, F10A1, TCPD, RAB7A, IDH3G, HCFC1, DHB4, HDGF, ROA3, 6PGD, NUP98, ACLY, TCP4, SYYC, UBP14, SNAA, IF5, TERA, DSRAD, TPD52, EIF3B, NU107, EPIPL, SC61B, SRP54, B2MG, SMD2, RL23A, YBOX1, NOP14, IF4G2, GTF2I, NUCB2, RT22, HMGN5, RBM10, TFAM, CLH1, SPTB2, SET, CAP1, EXOSX, EWS, ODO1, RL18A, NUCB1, M2OM, LMNB2, SRS11, CALD1, RL18, C1QBP, CKAP4, KHDR1, DHX9, GOGA2, SSRP1, AHNK, AIMP1, ILF3, SRSF5, SRSF6, TIF1B, TCOF, PICAL, SNW1, TRI29, EIF3A, MLEC, CAPR1, SMC1A, RRP1B, GANAB, NUMA1, U5S1, RRS1, ACOX1, PLEC, RNPS1, PUM3, RB11B, SEPT7, DDB1, CDC37, SRSF7, PCKGM, HNRL2, INF2, PDS5A, PREP, RRP12, TOIP1, HP1B3, RBM26, BRE1A, CDKAL, PRP8, ZC3HE, QSOX2, IKIP, TM10C, EIF3M, PABP2, KTN1, CAND1, THOC6, P66A, MISP, CCAR1, PELP1, NDUF2, RM50, PAF1, TXND5, TOIP2, THOC2, TM263, NU133, PDC6I, SCFD1, LMO7, ELYS, RT27, HS105, NU205, RAD50, SMRC1, TNPO1, FUBP1, P5CR2, PTCD3, DDX27, EFGM, IWS1, NIBA2, YMEL1, PSMD1, EIF3C, ROAA, CMS1, MBB1A, GNL3, PDIP3, PININ, ACAD9, SFXN1, CYBP, RM47, RTN4, DDX21, AAAS, CARF, AATF, BCLF1, MYOF, SYLC, NXF1, SEC63, LIMA1, SEPT9, KAD3, RCOR1, ACINU, TMCO1, PPIE, PA2G4, RUVB2, TR150, RT23, CHTOP, TLN1, HYOU1, SAM50, SP16H, UTP18, SRPRB
Species: Homo sapiens
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Xie X, Wu Q, Zhang K, Liu Y, Zhang N, Chen Q, Wang L, Li W, Zhang J, Liu Y. O-GlcNAc modification regulates MTA1 transcriptional activity during breast cancer cell genotoxic adaptation. Biochimica et biophysica acta. General subjects 2021 1865(8) 34019948
Abstract:
Chromatin modifier metastasis-associated protein 1 (MTA1), closely associated with tumor angiogenesis in breast cancer, plays an important role in gene expression and cancer cell behavior. Recently, an association between O-GlcNAc transferase (OGT) and MTA1 was identified by mass spectroscopy. However, the potential relationship between MTA1 and O-GlcNAc modification has not yet explored.