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Jeon BC, Kim YJ, Park AK, Song MR, Na KM, Lee J, An D, Park Y, Hwang H, Kim TD, Lim J, Park SK. Dynamic O-GlcNAcylation governs long-range chromatin interactions in V(D)J recombination during early B-cell development. Cellular & molecular immunology 2025 22(1) 39627609
Abstract:
V(D)J recombination secures the production of functional immunoglobulin (Ig) genes and antibody diversity during the early stages of B-cell development through long-distance interactions mediated by cis-regulatory elements and trans-acting factors. O-GlcNAcylation is a dynamic and reversible posttranslational modification of nuclear and cytoplasmic proteins that regulates various protein functions, including DNA-binding affinity and protein-protein interactions. However, the effects of O-GlcNAcylation on proteins involved in V(D)J recombination remain largely unknown. To elucidate this relationship, we downregulated O-GlcNAcylation in a mouse model by administering an O-GlcNAc inhibitor or restricting the consumption of a regular diet. Interestingly, the inhibition of O-GlcNAcylation in mice severely impaired Ig heavy-chain (IgH) gene rearrangement. We identified several factors crucial for V(D)J recombination, including YY1, CTCF, SMC1, and SMC3, as direct targets of O-GlcNAc modification. Importantly, O-GlcNAcylation regulates the physical interaction between SMC1 and SMC3 and the DNA-binding patterns of YY1 at the IgH gene locus. Moreover, O-GlcNAc inhibition downregulated DDX5 protein expression, affecting the functional association of CTCF with its DNA-binding sites at the IgH locus. Our results showed that locus contraction and long-range interactions throughout the IgH locus are disrupted in a manner dependent on the cellular O-GlcNAc level. In this study, we established that V(D)J recombination relies on the O-GlcNAc status of stage-specific proteins during early B-cell development and identified O-GlcNAc-dependent mechanisms as new regulatory components for the development of a diverse antibody repertoire.
O-GlcNAc proteins:
MPEG1, CUL4B, DHX8, RHG27, VIR, PNISR, FRPD1, RENT2, LAS1L, ITIH4, THOC2, MMRN1, PYR1, YTDC2, PTPRB, ANR44, RBM25, OSBL8, DAAF5, SAFB1, KI67, DESP, YTDC1, UBE4A, NUMA1, MORC3, HXK2, LEG9, KNG1, UBE3A, DCTN1, DIAP1, U5S1, RL21, PHB2, CPSF2, DHX15, EXOC4, STAG2, AP1B1, PININ, HNRH1, SP100, GP1BA, ITB3, RL35A, SPT5H, DHX9, E41L2, BAZ1A, ZFR, ROA2, PRS6A, FA5, AFAM, COR1A, SP1, C1QR1, COX2, AMY1, CO3, CO4B, B2MG, HBA, HBB1, K1C10, K2C1, CFAB, ALDOA, TBA1B, TBA3, ITAM, K1C18, LDHA, LCK, APOA4, PTPRC, CFAH, TTHY, ANXA2, ALBU, A1AT1, SPA3K, HS90A, TRFL, ENPL, APOE, MDHM, GNAI2, RPB1, ITB1, PDIA1, NUCL, APOA2, PTPRQ, CALM2, EF1A1, 4F2, PARP1, PERM, FINC, HS90B, K2C8, ITA5, ITB2, TCPA, RL7A, GELS, ICAM1, DNMT1, S10A6, RL27A, RS16, RL7, RSSA, LMNB1, ANXA6, RLA0, CD44, LEUK, H12, CN37, AMPE, HS71L, G3P, LAMP2, HSP72, ENOA, PTBP1, PPIA, TPIS, LYZ1, PCNA, PTPRA, BASI, KS6A1, KS6A3, COF1, FAS, THRB, RL13A, BIP, VIME, PLMN, VTDB, A1AT2, CBL, AP1G1, EIF3A, EST1C, ITAL, CD11B, MCM3, RS2, CD19, UBF1, TLN1, EZRI, MOES, KLKB1, H2AX, VAV, NCKP1, MUG1, KIF2A, DPP4, PTN6, FETUA, C5AR1, CEAM1, CD68, ANT3, SYWC, KIF4, DPOLA, RAB5C, RAB18, CD22, TSP1, CALX, RFC1, PRDX1, RL12, RL18, DNLI1, HSPA9, DYN2, RL28, MMP9, STAT1, STA5B, EPS15, TCPQ, MSH2, H14, H15, RAGP1, SIPA1, NSF, PRS7, BRCC3, NEDD4, CAPZB, RL6, RL5, RL13, RL36, KSYK, PERE, ROA1, MCM4, MCM5, SAHH, K2C6A, VATA, PA2G4, RAB7A, RL9, ADT2, IMA1, PON1, DPOD1, UBP10, KPYM, STAT6, RL10A, CEBPZ, PIPNB, MSH6, UBP5, ATPB, UBP25, NICA, ACTN4, EF2, OPA1, FOXP1, TPM2, WDHD1, ARPC4, RUVB1, PCBP1, ACTB, IF4A1, RS20, UB2D3, ARF3, RL26, RL27, RL37A, ARF4, HNRPK, RS7, PRS4, RS8, RS15A, RS14, RS23, RS18, RS11, RS13, SMD2, ARF6, PRS10, RS4X, RL18A, RL23A, RS6, H4, VATB2, RAB1A, RAN, RL23, RS24, RS25, RS26, RL30, RL31, RS3, RL8, PROF1, RL40, HSP7C, PHB1, RL22, RACK1, ACTS, TBA4A, TBB4B, 1433F, IMB1, M4K1, PKN1, STIM1, PYRG2, ROCK1, RAD50, PYRG1, TCPH, TCPB, TCPD, TCPE, TCPZ, TCPG, WNK1, RHOG, RL19, H33, BACH2, MCM2, MCM6, RS3A, ANX11, SMRC1, FUMH, ARVC, TBB5, APOA1, A1AT4, TYY1, HNRL2, LYAM3, TOP2A, APOH, TERA, UBA1, PLAK, ATPA, IKZF1, SPA3M, SMRCD, TOP1, RAC2, PYC, IF2P, CBG, ACADS, AMBP, PECA1, SSRP1, ZCH18, K2C80, PSA, PTCD3, NSUN2, EDEM3, MCM9, TMC5, HMHA1, HP1B3, GUAA, H2AV, SMCA4, PRC2C, MIDN, K1C26, K22E, PSMD1, BRE1B, ESYT1, AAK1, RHG17, EDC4, UBP19, GPD1L, ELNE, SC31A, IQGA2, K22O, ITB2L, C1TM, UN13A, PLCH1, PDS5B, CENPJ, DDX46, TR150, A16A1, EHMT1, MCTP2, RBM27, CYFP2, PSME4, MYO1G, LC7L3, PUR4, MYH1, LEO1, SIN3A, XRCC1, ODO1, HNRPD, SAMH1, HELLS, ARHG2, I17RA, PML, 2A5G, PPM1G, CFAI, CERU, CTCF, PRDX2, EZH2, HCFC1, PA1B3, ARHG1, PLSL, A2AP, HSP74, DSG1A, GSLG1, EWS, RAD21, FSCN1, GDIB, DDX5, HS105, ITIH2, ITA6, EI2BD, SERA, KINH, PDCD4, PZP, PRG2, MYH10, MCM7, NPM, PCBP2, CTR9, DDX3X, CD180, SPTB2, SPR1A, TIF1B, TFR1, RU17, SPT6H, NDUA4, IF4G2, MINT, RHG30, H2B1B, TOP2B, TPP2, AT2A3, H2A2C, VINC, PUR2, CLH1, SYMC, GNPTA, PDS5A, CDC5L, CE290, F120A, UBP7, JADE3, K1C42, K2C72, SR140, K2C73, S23IP, IF4G1, RBM26, P4R3A, U520, ABCF1, SMHD1, UGGG1, XPO1, ANO6, KIF15, KIF11, FHOD1, FKB15, PTN23, LPPRC, SMRC2, ECM29, CHD4, PK3C3, NUP98, GMIP, NFRKB, TEX2, UBE2O, KDM3B, CE162, CNOT1, CAND1, LARP1, VIP2, RS9, RL35, RS27L, 2AAA, SND1, ASAP2, IPO8, HUWE1, LC7L2, MBB1A, INT7, CTDP1, PP6R1, ELP1, DCAF1, CLAP1, SCRIB, PUM1, NU214, NAA15, FACD2, FBLL1, SYMPK, SIG10, DDX42, ANFY1, EFTU, TNPO1, ROA3, PLD4, SYAC, S2512, NU107, PTBP3, NRDC, ERC6L, GANAB, SP130, NUP93, SUN2, RCC2, IPO5, ODP2, RBGPR, SYLC, SYQ, ECHA, RL24, CLAP2, CNDH2, PB1, FLNA, SYIC, IFIX, CIP2A, GEMI5, UBP47, CTL2, TBCD, POGZ, ANC2, KS6A5, EFL1, LCAP, DOCK8, CND2, IWS1, RBM14, DOCK2, UBA6, MIC60, UFL1, VCIP1, NUP88, NED4L, RPB2, AQR, SMC4, SMC2, SYEP, TCRG1, LONM, OGT1, CHERP, CCAR1, INT5, PYGB, COPA, PLCG2, INT4, EIF3B, BCLF1, K319L, URP2, DNM1L, NEK9, FCHO1, PAF1, IPO11, CND1, MATR3, PLCL2, DP13A, PO121, SF3A1, HNRPL, NU133, EIF3C, BST2, CD177, ADIPL, CDC16, STPAP, LRC8C, ACSF2, EVI2B, MYH9, UHRF1, VIGLN, ADPGK, PSMD2, HNRL1, AT1A1, MICA1, CCAR2, DX39A, SRSF4, K2C79, RFA1, HNRPU, S25A3, RBM39, SEC63, IPO4, SFPQ, ACLY, IF4A3, NDUS1, ATPG, DDX1, UBAP2, HEMO, IPO9, RBM5, PRP6, SMCA5, SP16H, TADBP, SF3B3, SYDC, PP6R3, C1TC, NOP2, PDE2A, KIF2C, K2C5, SIR1, XPO5, SMRD2, ECHB, ARP3, EMIL1, UN45A, ACON, DPP3, HSP7E, GTPB4, ARBK1, SRRT, SF3B1, NU155, RRBP1, DHX30, RL17, NUDC2, 6PGL, COTL1, RM18, TRAP1, AT5F1, RL14, XPOT, PRPS2, RRP44, SMC1A, SMUF1, SMC3, PUR9, SNX2, ROA0, RL11, GARS, RL15, MTREX, MMS19, HNRPM, SYRC, NH2L1, RL34, GRIFN, UB2V2, S10AE, CORO7, STAG1, CUL5, SC23B, CALL3, NOP56, RL4, EF1G, PRP4, QCR2, PELP1, AP2B1, XRN2, NVL, EIF3K, 6PGD, SYF1, EIF3F, XPO7, IPO7, RENT1, BCAP, PESC, ERAP1, VPS35, EHD4, TFP11, XPO2, PKHA2, RBP2, UBE4B, SHIP1, HRG, XPO4, AN32B, GTF2I, DYHC1, STK4, COPB, DDX21, ACINU, FLII, IQGA1, HYOU1, HIP1R, FMNL1, SACS, SART3, GIT2, MY18A, ITA2B, FAK2, CAF1A, K1C17, FETUB, PLEC, PO210, ADDA, PCLO, COPG1, UBQL2, H2AY, ZEB2, GALK1, SC11A, MTA2, PR40A, TIM, MYO1C, INSRR, MD1L1, PDC6I, PFKAP, CXA10, GANP, IF2G, ADNP, P5CS, SAE2, ARI1, DX39B, CLIC1, SYVC, AP3B1, ILF3, USO1, HNRPC, BAZ1B, K1C16, SNUT1
Species: Mus musculus
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Zaro BW, Batt AR, Chuh KN, Navarro MX, Pratt MR. The Small Molecule 2-Azido-2-deoxy-glucose Is a Metabolic Chemical Reporter of O-GlcNAc Modifications in Mammalian Cells, Revealing an Unexpected Promiscuity of O-GlcNAc Transferase. ACS chemical biology 2017 12(3) 28135057
Abstract:
Glycans can be directly labeled using unnatural monosaccharide analogs, termed metabolic chemical reporters (MCRs). These compounds enable the secondary visualization and identification of glycoproteins by taking advantage of bioorthogonal reactions. Most widely used MCRs have azides or alkynes at the 2-N-acetyl position but are not selective for one class of glycoprotein over others. To address this limitation, we are exploring additional MCRs that have bioorthogonal functionality at other positions. Here, we report the characterization of 2-azido-2-deoxy-glucose (2AzGlc). We find that 2AzGlc selectively labels intracellular O-GlcNAc modifications, which further supports a somewhat unexpected, structural flexibility in this pathway. In contrast to the endogenous modification N-acetyl-glucosamine (GlcNAc), we find that 2AzGlc is not dynamically removed from protein substrates and that treatment with higher concentrations of per-acetylated 2AzGlc is toxic to cells. Finally, we demonstrate that this toxicity is an inherent property of the small-molecule, as removal of the 6-acetyl-group renders the corresponding reporter nontoxic but still results in protein labeling.
O-GlcNAc proteins:
A2A5R8, A2A6U3, A2AF81, A2AG39, A2AIW9, A2AJ72, A2AJI1, A2AKV2, A2AL12, A2AMW0, A2AUR3, LAS1L, TRM1L, A5A4Y9, A6PWC3, B0QZF8, B1AU76, UPP, B7ZC19, B7ZP47, B8JJC1, D3YWF6, D3YWK1, D3YWS3, D3YYP4, E9PX53, E9Q066, I2BP2, E9Q4Q2, E9Q5L7, E9Q7W0, E9QP59, F8WGW3, G3UX26, G3UYZ0, G3UZ44, G3X972, H3BKW0, H7BWX9, GTPB1, AIP, ATOX1, HDAC1, GSH0, DHX15, IKBE, AKAP2, SLK, IMPCT, IF6, ACOT1, NMT1, DHB12, SRPK1, ZN326, KLC1, RPP30, IDHC, CASP8, GCR, TYSY, RIR1, S10AA, LEG1, G3P, TPIS, PRDX3, CBX3, TISD, CATA, IMDH2, NFKB1, MAP4, CEBPB, CDK4, FKBP4, HMGB2, KAP3, MP2K1, RANG, PTN11, FBRL, PTN12, FMR1, HMGCL, DYN1, CAP1, STAT1, STAT3, PURA, ALD2, SIPA1, PURA2, GSHR, FOSL2, FOSL1, GSTM5, PCY1A, VATA, HDGF, UBP10, RHOX5, HMGA2, CCHL, NUB1, FAF1, ZNRD2, TB182, PCBP1, ARL1, PFD3, TCTP, HMGB1, DYL1, UB2L3, HDAC2, ELAV1, 4EBP2, PYRG1, TCPB, SPTC2, PSME2, BOP1, WBP2, XDH, HMMR, E2AK2, CO6A1, FABP5, LARP7, CNN2, PP4R2, RM10, Q3TFP0, GUAA, FUBP2, TRADD, CTU2, Q3U4W8, SNX27, BABA1, EDC4, COBL1, SKAP2, ARH40, CSTOS, LRRF1, ZMAT1, Q45VK5, JIP4, MDC1, Q5SUW3, SRC8, SAMH1, KHDR1, SPB6, CAPR1, PAPS1, TS101, PA1B2, FNTA, IGBP1, FSCN1, FXR1, CBX5, RAI1, MELK, FOXC2, DBNL, CYTB, NDRG1, RALY, GPDM, RAB3I, F120A, NOP58, Q6DFZ1, TPM4, Q6NXL1, Q6NZD2, TNPO3, SMHD1, UGGG1, UBXN7, TXLNA, DC1L2, KI18B, JUPI2, LARP1, CAND2, ACAP2, HNRPQ, SPAG7, ATX2L, MAP6, ELP1, PJA2, PGRC2, KCMF1, Q80VB6, FA98B, WDTC1, CPPED, LPP, PEF1, IF4B, ATG4B, FTO, Q8BH80, PRUN1, AHSA1, RCC2, NCEH1, LSS, FBLN3, PPR18, SRRM2, MSRB3, PPME1, RL1D1, TBCD4, NHLC2, MAP1S, TLK1, CND2, RAE1L, SEP10, ZFP57, UBA6, UBA3, STON1, PPM1F, GNL3, PUR1, HMCS1, Q8K0C7, PDXK, ANGE2, LRC41, SDE2, DNM1L, ANLN, MATR3, CBR3, MEPCE, ERF3A, DC1L1, SPART, TDIF2, HEXI1, SNP47, UBP15, MAVS, UBXN4, ACSF2, MICU1, ZNG1, BACH, ISOC1, IPYR2, CSDE1, PIP30, GCSH, Q91X76, DUS3L, BAG2, KCC1A, TTC1, HNRLL, RIN1, PP6R3, MARC2, DBR1, ATAD3, PSIP1, NXF1, NONO, PLST, RRAGC, VMA5A, TARA, DDAH2, TADA1, GRPE1, ABD12, NU155, OGFR, NPM3, GLOD4, COPRS, DPOE4, MIEN1, TRAP1, VATG1, CHSP1, OCAD1, RANB3, MFR1L, NDUF7, TBC15, PPIL4, MPPB, CYBP, ZCHC8, CD37L, MMS19, ARPIN, HNRPM, NXP20, SPF27, TOE1, Q9D4G5, ATAD1, CF226, IPYR, ORN, CNN3, KAP0, PLIN3, AKAP8, EIF3F, IFG15, LIMA1, NEK7, RTN3, STK3, NUP50, SYSM, HSPB8, BAG3, CUL3, RABX5, CAF1A, DREB, TOM40, DNJC7, NFU1, FBX6, NUBP1, DEST, TEBP, ACOT9, NFKB2, KAD2, SKP1, PDC6I, VAPA, CARM1, RAD9A, IF2G, SAE2, TRIP6, MBD2, HNRPF
Species: Mus musculus
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