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- EMDB-29647: Body1 of G4 RNA-mediated PRC2 dimer from multibody refinement -

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Basic information

Entry
Database: EMDB / ID: EMD-29647
TitleBody1 of G4 RNA-mediated PRC2 dimer from multibody refinement
Map data
Sample
  • Complex: G4 RNA-mediated dimer of polycomb repressive complex 2
    • Protein or peptide: Polycomb protein SUZ12Polycomb-group proteins
    • Protein or peptide: Polycomb protein EED
    • Protein or peptide: Histone-binding protein RBBP4
    • Protein or peptide: Histone-lysine N-methyltransferase EZH2
    • Protein or peptide: protein Jumonji isoform X3
    • Protein or peptide: Zinc finger protein AEBP2
    • RNA: G4 RNA
KeywordsPRC2 / G-quadruplex RNA / RNP complex / chromatin modifier / GENE REGULATION
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsJiarui JS / Vignesh VK
Funding support United States, 2 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R00GM132544 United States
CitationJournal: Science / Year: 2023
Title: Structural basis for inactivation of PRC2 by G-quadruplex RNA.
Authors: Jiarui Song / Anne R Gooding / Wayne O Hemphill / Brittney D Love / Anne Robertson / Liqi Yao / Leonard I Zon / Trista E North / Vignesh Kasinath / Thomas R Cech /
Abstract: Polycomb repressive complex 2 (PRC2) silences genes through trimethylation of histone H3K27. PRC2 associates with numerous precursor messenger RNAs (pre-mRNAs) and long noncoding RNAs (lncRNAs) with ...Polycomb repressive complex 2 (PRC2) silences genes through trimethylation of histone H3K27. PRC2 associates with numerous precursor messenger RNAs (pre-mRNAs) and long noncoding RNAs (lncRNAs) with a binding preference for G-quadruplex RNA. In this work, we present a 3.3-Å-resolution cryo-electron microscopy structure of PRC2 bound to a G-quadruplex RNA. Notably, RNA mediates the dimerization of PRC2 by binding both protomers and inducing a protein interface composed of two copies of the catalytic subunit EZH2, thereby blocking nucleosome DNA interaction and histone H3 tail accessibility. Furthermore, an RNA-binding loop of EZH2 facilitates the handoff between RNA and DNA, another activity implicated in PRC2 regulation by RNA. We identified a gain-of-function mutation in this loop that activates PRC2 in zebrafish. Our results reveal mechanisms for RNA-mediated regulation of a chromatin-modifying enzyme.
History
DepositionJan 31, 2023-
Header (metadata) releaseOct 4, 2023-
Map releaseOct 4, 2023-
UpdateOct 4, 2023-
Current statusOct 4, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_29647.png

Downloads & links

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Map

FileDownload / File: emd_29647.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.06344 Å
Density
Contour LevelBy AUTHOR: 0.015
Minimum - Maximum-0.016353995 - 0.05215779
Average (Standard dev.)0.00022294959 (±0.0018041022)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 319.03198 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_29647_msk_1.map
Projections & Slices
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Additional map: #1

Fileemd_29647_additional_1.map
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Half map: #1

Fileemd_29647_half_map_1.map
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Half map: #2

Fileemd_29647_half_map_2.map
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Sample components

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Entire : G4 RNA-mediated dimer of polycomb repressive complex 2

EntireName: G4 RNA-mediated dimer of polycomb repressive complex 2
Components
  • Complex: G4 RNA-mediated dimer of polycomb repressive complex 2
    • Protein or peptide: Polycomb protein SUZ12Polycomb-group proteins
    • Protein or peptide: Polycomb protein EED
    • Protein or peptide: Histone-binding protein RBBP4
    • Protein or peptide: Histone-lysine N-methyltransferase EZH2
    • Protein or peptide: protein Jumonji isoform X3
    • Protein or peptide: Zinc finger protein AEBP2
    • RNA: G4 RNA

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Supramolecule #1: G4 RNA-mediated dimer of polycomb repressive complex 2

SupramoleculeName: G4 RNA-mediated dimer of polycomb repressive complex 2
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Polycomb protein SUZ12

MacromoleculeName: Polycomb protein SUZ12 / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
SequenceString: MAPQKHGGGG GGGSGPSAGS GGGGFGGSAA VAAATASGGK SGGGSCGGGG SYSASSSSSA AAAAGAAVLP VKKPKMEHVQ ADHELFLQA FEKPTQIYRF LRTRNLIAPI FLHRTLTYMS HRNSRTNIKR KTFKVDDMLS KVEKMKGEQE SHSLSAHLQL T FTGFFHKN ...String:
MAPQKHGGGG GGGSGPSAGS GGGGFGGSAA VAAATASGGK SGGGSCGGGG SYSASSSSSA AAAAGAAVLP VKKPKMEHVQ ADHELFLQA FEKPTQIYRF LRTRNLIAPI FLHRTLTYMS HRNSRTNIKR KTFKVDDMLS KVEKMKGEQE SHSLSAHLQL T FTGFFHKN DKPSPNSENE QNSVTLEVLL VKVCHKKRKD VSCPIRQVPT GKKQVPLNPD LNQTKPGNFP SLAVSSNEFE PS NSHMVKS YSLLFRVTRP GRREFNGMIN GETNENIDVN EELPARRKRN REDGEKTFVA QMTVFDKNRR LQLLDGEYEV AMQ EMEECP ISKKRATWET ILDGKRLPPF ETFSQGPTLQ FTLRWTGETN DKSTAPIAKP LATRNSESLH QENKPGSVKP TQTI AVKES LTTDLQTRKE KDTPNENRQK LRIFYQFLYN NNTRQQTEAR DDLHCPWCTL NCRKLYSLLK HLKLCHSRFI FNYVY HPKG ARIDVSINEC YDGSYAGNPQ DIHRQPGFAF SRNGPVKRTP ITHILVCRPK RTKASMSEFL ESEDGEVEQQ RTYSSG HNR LYFHSDTCLP LRPQEMEVDS EDEKDPEWLR EKTITQIEEF SDVNEGEKEV MKLWNLHVMK HGFIADNQMN HACMLFV EN YGQKIIKKNL CRNFMLHLVS MHDFNLISIM SIDKAVTKLR EMQQKLEKGE SASPANEEIT EEQNGTANGF SEINSKEK A LETDSVSGVS KQSKKQKL

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Macromolecule #2: Polycomb protein EED

MacromoleculeName: Polycomb protein EED / type: protein_or_peptide / ID: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
SequenceString: MSEREVSTAP AGTDMPAAKK QKLSSDENSN PDLSGDENDD AVSIESGTNT ERPDTPTNTP NAPGRKSWGK GKWKSKKCKY SFKCVNSLK EDHNQPLFGV QFNWHSKEGD PLVFATVGSN RVTLYECHSQ GEIRLLQSYV DADADENFYT CAWTYDSNTS H PLLAVAGS ...String:
MSEREVSTAP AGTDMPAAKK QKLSSDENSN PDLSGDENDD AVSIESGTNT ERPDTPTNTP NAPGRKSWGK GKWKSKKCKY SFKCVNSLK EDHNQPLFGV QFNWHSKEGD PLVFATVGSN RVTLYECHSQ GEIRLLQSYV DADADENFYT CAWTYDSNTS H PLLAVAGS RGIIRIINPI TMQCIKHYVG HGNAINELKF HPRDPNLLLS VSKDHALRLW NIQTDTLVAI FGGVEGHRDE VL SADYDLL GEKIMSCGMD HSLKLWRINS KRMMNAIKES YDYNPNKTNR PFISQKIHFP DFSTRDIHRN YVDCVRWLGD LIL SKSCEN AIVCWKPGKM EDDIDKIKPS ESNVTILGRF DYSQCDIWYM RFSMDFWQKM LALGNQVGKL YVWDLEVEDP HKAK CTTLT HHKCGAAIRQ TSFSRDSSIL IAVCDDASIW RWDRLR

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Macromolecule #3: Histone-binding protein RBBP4

MacromoleculeName: Histone-binding protein RBBP4 / type: protein_or_peptide / ID: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
SequenceString: MADKEAAFDD AVEERVINEE YKIWKKNTPF LYDLVMTHAL EWPSLTAQWL PDVTRPEGKD FSIHRLVLGT HTSDEQNHLV IASVQLPND DAQFDASHYD SEKGEFGGFG SVSGKIEIEI KINHEGEVNR ARYMPQNPCI IATKTPSSDV LVFDYTKHPS K PDPSGECN ...String:
MADKEAAFDD AVEERVINEE YKIWKKNTPF LYDLVMTHAL EWPSLTAQWL PDVTRPEGKD FSIHRLVLGT HTSDEQNHLV IASVQLPND DAQFDASHYD SEKGEFGGFG SVSGKIEIEI KINHEGEVNR ARYMPQNPCI IATKTPSSDV LVFDYTKHPS K PDPSGECN PDLRLRGHQK EGYGLSWNPN LSGHLLSASD DHTICLWDIS AVPKEGKVVD AKTIFTGHTA VVEDVSWHLL HE SLFGSVA DDQKLMIWDT RSNNTSKPSH SVDAHTAEVN CLSFNPYSEF ILATGSADKT VALWDLRNLK LKLHSFESHK DEI FQVQWS PHNETILASS GTDRRLNVWD LSKIGEEQSP EDAEDGPPEL LFIHGGHTAK ISDFSWNPNE PWVICSVSED NIMQ VWQMA ENIYNDEDPE GSVDPEGQGS

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Macromolecule #4: Histone-lysine N-methyltransferase EZH2

MacromoleculeName: Histone-lysine N-methyltransferase EZH2 / type: protein_or_peptide / ID: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
SequenceString: MGQTGKKSEK GPVCWRKRVK SEYMRLRQLK RFRRADEVKS MFSSNRQKIL ERTEILNQEW KQRRIQPVHI LTSVSSLRGT RECSVTSDL DFPTQVIPLK TLNAVASVPI MYSWSPLQQN FMVEDETVLH NIPYMGDEVL DQDGTFIEEL IKNYDGKVHG D RECGFIND ...String:
MGQTGKKSEK GPVCWRKRVK SEYMRLRQLK RFRRADEVKS MFSSNRQKIL ERTEILNQEW KQRRIQPVHI LTSVSSLRGT RECSVTSDL DFPTQVIPLK TLNAVASVPI MYSWSPLQQN FMVEDETVLH NIPYMGDEVL DQDGTFIEEL IKNYDGKVHG D RECGFIND EIFVELVNAL GQYNDDDDDD DGDDPEEREE KQKDLEDHRD DKESRPPRKF PSDKIFEAIS SMFPDKGTAE EL KEKYKEL TEQQLPGALP PECTPNIDGP NAKSVQREQS LHSFHTLFCR RCFKYDCFLH RKCNYSFHAT PNTYKRKNTE TAL DNKPCG PQCYQHLEGA KEFAAALTAE RIKTPPKRPG GRRRGRLPNN SSRPSTPTIN VLESKDTDSD REAGTETGGE NNDK EEEEK KDETSSSSEA NSRCQTPIKM KPNIEPPENV EWSGAEASMF RVLIGTYYDN FCAIARLIGT KTCRQVYEFR VKESS IIAP APAEDVDTPP RKKKRKHRLW AAHCRKIQLK KDGSSNHVYN YQPCDHPRQP CDSSCPCVIA QNFCEKFCQC SSECQN RFP GCRCKAQCNT KQCPCYLAVR ECDPDLCLTC GAADHWDSKN VSCKNCSIQR GSKKHLLLAP SDVAGWGIFI KDPVQKN EF ISEYCGEIIS QDEADRRGKV YDKYMCSFLF NLNNDFVVDA TRKGNKIRFA NHSVNPNCYA KVMMVNGDHR IGIFAKRA I QTGEELFFDY RYSQADALKY VGIEREMEIP

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Macromolecule #5: protein Jumonji isoform X3

MacromoleculeName: protein Jumonji isoform X3 / type: protein_or_peptide / ID: 5 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
SequenceString: MSKERPKRNI IQKKYDDSDG IPWSEERVVR KVLYLSLKEF KNAQKRQHGE GIAGSLKSVN GLLGNDQSKA LGPASEQSEN EKDDASQVS STSNDVSSSD FEEGPSRKRP RLQAQRKFAQ SQPNSPSTTP VKTVEPLLPP PATQISDLSK RKPKTEDFLT F LCLRGSPA ...String:
MSKERPKRNI IQKKYDDSDG IPWSEERVVR KVLYLSLKEF KNAQKRQHGE GIAGSLKSVN GLLGNDQSKA LGPASEQSEN EKDDASQVS STSNDVSSSD FEEGPSRKRP RLQAQRKFAQ SQPNSPSTTP VKTVEPLLPP PATQISDLSK RKPKTEDFLT F LCLRGSPA LPSSMVYFGS SQDEEDVEEE DDETEDVKTA NNNASSSCQS TPRKGKTHKH VHNGHVFNGS NRSTREKEPA QK HKSKETT PAKEKHIDHR ADSRREPASV AQPTATPSAG SLAKGLPANH QPPPPHRSAQ DLRKQVTLHV SKVNGVTRMS SLG AGTTSA KKIREVRPSP SKTVKYTATV TKGTVTYTKA KRELVKETKP THHKPSSAVN HTISGKTESS NAKTRKQVLS LGGA STSTG PAASGLKASS RLNPKSCTKE VGGRQLREGL RNSKRRLEEA QQVDKPQSPP KKMKGAAGIA EAPGKKASAA SAEKS LLNG HVKKEVPERS LERNRPKRAT AGKNMPGKQA HGKAEGTPCE NRSTSQPESS HKPHDPQGKP EKGIGKSGWT AMDEIP VLR PSAKEFHDPL IYIESVRAQV EKYGMCRVIP PPDWRPECKL NDEMRFVTQI QHIHKLGRRW GPNVQRLACI KKHLRSQ GI TMDELPLIGG CELDLACFFR LINEMGGMQQ VTDLKKWNKL ADMLRIPKTA QDRLAKLQEA YCQYLLSYDS LSPEEHRR L EKEVLMEKEI LEKRKGPLEG HTENDHHKFH SLPRFEPKNG LIHGVTPRNG FRSKLKEVGQ APLKTGRRRL FAQEKEVVK EEEEDKGVLN DFHKCIYKGR SVSLTTFYRT ARNIMNMCFS KEPAPAEIEQ EYWRLVEEKD CHVAVHCGKV DTNTHGSGFP VGKSEPFSR HGWNLTVLPN NTGSILRHLG AVPGVTIPWL NIGMVFSTSC WSRDQNHLPY IDYLHTGADC IWYCIPAEEE N KLEDVVHT LLQANGTPGL QMLESNVMIS PEVLCKEGIK VHRTVQQSGQ FVVCFPGSFV SKVCCGYSVS ETVHFATTQW TS MGFETAK EMKRRHIAKP FSMEKLLYQI AQAEAKKENG PTLSTISALL DELRDTELRQ RRQLFEAGLH SSARYGSHDG NST VADGKK KPRKWLQLET SERRCQICQH LCYLSMVVQE NENVVFCLEC ALRHVEKQKS CRGLKLMYRY DEEQIISLVN QICG KVSGK HGGIENCLNK PTPKRGPRKR ATVDVPPSRL PSS

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Macromolecule #6: Zinc finger protein AEBP2

MacromoleculeName: Zinc finger protein AEBP2 / type: protein_or_peptide / ID: 6 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
SequenceString: MAAAITDMAD LEELSRLSPL PPGSPGSAAR GRAEPPEEEE EEEEEEEEAE AEAVAALLLN GGSGGGGGGG GGGVGGGEAE TMSEPSPES ASQAGEDEDE EEDDEEEEDE SSSSGGGEEE SSAESLVGSS GGSSSDETRS LSPGAASSSS GDGDGKEGLE E PKGPRGSQ ...String:
MAAAITDMAD LEELSRLSPL PPGSPGSAAR GRAEPPEEEE EEEEEEEEAE AEAVAALLLN GGSGGGGGGG GGGVGGGEAE TMSEPSPES ASQAGEDEDE EEDDEEEEDE SSSSGGGEEE SSAESLVGSS GGSSSDETRS LSPGAASSSS GDGDGKEGLE E PKGPRGSQ GGGGGGSSSS SVVSSGGDEG YGTGGGGSSA TSGGRRGSLE MSSDGEPLSR MDSEDSISST IMDVDSTISS GR STPAMMN GQGSTTSSSK NIAYNCCWDQ CQACFNSSPD LADHIRSIHV DGQRGGVFVC LWKGCKVYNT PSTSQSWLQR HML THSGDK PFKCVVGGCN ASFASQGGLA RHVPTHFSQQ NSSKVSSQPK AKEESPSKAG MNKRRKLKNK RRRSLPRPHD FFDA QTLDA IRHRAICFNL SAHIESLGKG HSVVFHSTVI AKRKEDSGKI KLLLHWMPED ILPDVWVNES ERHQLKTKVV HLSKL PKDT ALLLDPNIYR TMPQKRLKRT LIRKVFNLYL SKQ

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Macromolecule #7: G4 RNA

MacromoleculeName: G4 RNA / type: rna / ID: 7
Source (natural)Organism: Homo sapiens (human)
SequenceString:
GGGUAAGGGU AAGGGUAAGG GUAA

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.9
Details: RNP complex buffer (25 mM HEPES pH 7.9, 50 mM KCl, 2 mM MgCl2, 10% glycerol, and 1mM TCEP) EM preparation buffer I (25 mM HEPES pH 7.9, 50 mM KCl, 2.5% glycerol, and 1mM TCEP) EM preparation ...Details: RNP complex buffer (25 mM HEPES pH 7.9, 50 mM KCl, 2 mM MgCl2, 10% glycerol, and 1mM TCEP) EM preparation buffer I (25 mM HEPES pH 7.9, 50 mM KCl, 2.5% glycerol, and 1mM TCEP) EM preparation buffer II (25 mM HEPES pH 7.9, 50 mM KCl, 2.5% glycerol, 0.01%NP-40, and 1mM TCEP).
GridModel: Quantifoil R2/1 / Material: GOLD / Mesh: 300
VitrificationCryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 281 K / Instrument: LEICA PLUNGER / Details: 3s of single side blotting.
DetailsWe used streptavidin-affinity grid preparation method with biotin-labeled RNA at 100 nM concentration. PRC2 was applied in excess at 600 nM.

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsCalibrated magnification: 81000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 0.01 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.6 µm
Specialist opticsEnergy filter - Slit width: 20 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 18632 / Average electron dose: 60.0 e/Å2 / Details: 60 frames per movie
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 3885383
Startup modelType of model: OTHER / Details: Negative staining model
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 217196
FSC plot (resolution estimation)

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