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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-21664 | ||||||||||||||||||
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Title | Cryo-EM map of mutant Mcm2-7 hexamer with Mcm6 WHD truncation | ||||||||||||||||||
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![]() | DNA replication / Cryo-EM / OCCM-deltaC6 / REPLICATION | ||||||||||||||||||
Function / homology | ![]() MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / premeiotic DNA replication / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / mitotic DNA replication / Activation of the pre-replicative complex / CMG complex ...MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / premeiotic DNA replication / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / mitotic DNA replication / Activation of the pre-replicative complex / CMG complex / nuclear pre-replicative complex / MCM complex / Activation of ATR in response to replication stress / DNA replication preinitiation complex / replication fork protection complex / double-strand break repair via break-induced replication / mitotic DNA replication initiation / single-stranded DNA helicase activity / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / DNA strand elongation involved in DNA replication / DNA unwinding involved in DNA replication / nuclear replication fork / DNA replication origin binding / DNA replication initiation / subtelomeric heterochromatin formation / DNA helicase activity / helicase activity / transcription elongation by RNA polymerase II / heterochromatin formation / single-stranded DNA binding / DNA helicase / chromosome, telomeric region / DNA damage response / chromatin binding / ATP hydrolysis activity / nucleoplasm / ATP binding / nucleus / metal ion binding / cytoplasm Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() | ||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 7.7 Å | ||||||||||||||||||
![]() | Yuan Z / Schneider S | ||||||||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Structural mechanism of helicase loading onto replication origin DNA by ORC-Cdc6. Authors: Zuanning Yuan / Sarah Schneider / Thomas Dodd / Alberto Riera / Lin Bai / Chunli Yan / Indiana Magdalou / Ivaylo Ivanov / Bruce Stillman / Huilin Li / Christian Speck / ![]() ![]() Abstract: DNA replication origins serve as sites of replicative helicase loading. In all eukaryotes, the six-subunit origin recognition complex (Orc1-6; ORC) recognizes the replication origin. During late M- ...DNA replication origins serve as sites of replicative helicase loading. In all eukaryotes, the six-subunit origin recognition complex (Orc1-6; ORC) recognizes the replication origin. During late M-phase of the cell-cycle, Cdc6 binds to ORC and the ORC-Cdc6 complex loads in a multistep reaction and, with the help of Cdt1, the core Mcm2-7 helicase onto DNA. A key intermediate is the ORC-Cdc6-Cdt1-Mcm2-7 (OCCM) complex in which DNA has been already inserted into the central channel of Mcm2-7. Until now, it has been unclear how the origin DNA is guided by ORC-Cdc6 and inserted into the Mcm2-7 hexamer. Here, we truncated the C-terminal winged-helix-domain (WHD) of Mcm6 to slow down the loading reaction, thereby capturing two loading intermediates prior to DNA insertion in budding yeast. In "semi-attached OCCM," the Mcm3 and Mcm7 WHDs latch onto ORC-Cdc6 while the main body of the Mcm2-7 hexamer is not connected. In "pre-insertion OCCM," the main body of Mcm2-7 docks onto ORC-Cdc6, and the origin DNA is bent and positioned adjacent to the open DNA entry gate, poised for insertion, at the Mcm2-Mcm5 interface. We used molecular simulations to reveal the dynamic transition from preloading conformers to the loaded conformers in which the loading of Mcm2-7 on DNA is complete and the DNA entry gate is fully closed. Our work provides multiple molecular insights into a key event of eukaryotic DNA replication. | ||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 5.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 22 KB 22 KB | Display Display | ![]() |
Images | ![]() | 157.8 KB | ||
Filedesc metadata | ![]() | 8.9 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6wgfMC ![]() 6wgcC ![]() 6wggC ![]() 6wgiC C: citing same article ( M: atomic model generated by this map |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.31 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Mcm2-7
Entire | Name: Mcm2-7 |
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Components |
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-Supramolecule #1: Mcm2-7
Supramolecule | Name: Mcm2-7 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: DNA replication licensing factor MCM2
Macromolecule | Name: DNA replication licensing factor MCM2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 98.911539 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSDNRRRRRE EDDSDSENEL PPSSPQQHFR GGMNPVSSPI GSPDMINPEG DDNEVDDVPD IDEVEEQMNE VDLMDDNMYE DYAADHNRD RYDPDQVDDR EQQELSLSER RRIDAQLNER DRLLRNVAYI DDEDEEQEGA AQLDEMGLPV QRRRRRRQYE D LENSDDDL ...String: MSDNRRRRRE EDDSDSENEL PPSSPQQHFR GGMNPVSSPI GSPDMINPEG DDNEVDDVPD IDEVEEQMNE VDLMDDNMYE DYAADHNRD RYDPDQVDDR EQQELSLSER RRIDAQLNER DRLLRNVAYI DDEDEEQEGA AQLDEMGLPV QRRRRRRQYE D LENSDDDL LSDMDIDPLR EELTLESLSN VKANSYSEWI TQPNVSRTIA RELKSFLLEY TDETGRSVYG ARIRTLGEMN SE SLEVNYR HLAESKAILA LFLAKCPEEM LKIFDLVAME ATELHYPDYA RIHSEIHVRI SDFPTIYSLR ELRESNLSSL VRV TGVVTR RTGVFPQLKY VKFNCLKCGS ILGPFFQDSN EEIRISFCTN CKSKGPFRVN GEKTVYRNYQ RVTLQEAPGT VPPG RLPRH REVILLADLV DVSKPGEEVE VTGIYKNNYD GNLNAKNGFP VFATIIEANS IKRREGNTAN EGEEGLDVFS WTEEE EREF RKISRDRGII DKIISSMAPS IYGHRDIKTA VACSLFGGVP KNVNGKHSIR GDINVLLLGD PGTAKSQILK YVEKTA HRA VFATGQGASA VGLTASVRKD PITKEWTLEG GALVLADKGV CLIDEFDKMN DQDRTSIHEA MEQQSISISK AGIVTTL QA RCSIIAAANP NGGRYNSTLP LAQNVSLTEP ILSRFDILCV VRDLVDEEAD ERLATFVVDS HVRSHPENDE DREGEELK N NGESAIEQGE DEINEQLNAR QRRLQRQRKK EEEISPIPQE LLMKYIHYAR TKIYPKLHQM DMDKVSRVYA DLRRESIST GSFPITVRHL ESILRIAESF AKMRLSEFVS SYDLDRAIKV VVDSFVDAQK VSVRRQLRRS FAIYTLGH UniProtKB: DNA replication licensing factor MCM2 |
-Macromolecule #2: DNA replication licensing factor MCM7
Macromolecule | Name: DNA replication licensing factor MCM7 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 95.049875 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSAALPSIQL PVDYNNLFNE ITDFLVTFKQ DTLSSDATRN ENEDENLDAE NIEQHLLEKG PKYMAMLQKV ANRELNSVII DLDDILQYQ NEKFLQGTQA DDLVSAIQQN ANHFTELFCR AIDNNMPLPT KEIDYKDDVL DVILNQRRLR NERMLSDRTN E IRSENLMD ...String: MSAALPSIQL PVDYNNLFNE ITDFLVTFKQ DTLSSDATRN ENEDENLDAE NIEQHLLEKG PKYMAMLQKV ANRELNSVII DLDDILQYQ NEKFLQGTQA DDLVSAIQQN ANHFTELFCR AIDNNMPLPT KEIDYKDDVL DVILNQRRLR NERMLSDRTN E IRSENLMD TTMDPPSSMN DALREVVEDE TELFPPNLTR RYFLYFKPLS QNCARRYRKK AISSKPLSVR QIKGDFLGQL IT VRGIITR VSDVKPAVEV IAYTCDQCGY EVFQEVNSRT FTPLSECTSE ECSQNQTKGQ LFMSTRASKF SAFQECKIQE LSQ QVPVGH IPRSLNIHVN GTLVRSLSPG DIVDVTGIFL PAPYTGFKAL KAGLLTETYL EAQFVRQHKK KFASFSLTSD VEER VMELI TSGDVYNRLA KSIAPEIYGN LDVKKALLLL LVGGVDKRVG DGMKIRGDIN VCLMGDPGVA KSQLLKAICK ISPRG VYTT GKGSSGVGLT AAVMKDPVTD EMILEGGALV LADNGICCID EFDKMDESDR TAIHEVMEQQ TISISKAGIN TTLNAR TSI LAAANPLYGR YNPRLSPLDN INLPAALLSR FDILFLMLDI PSRDDDEKLA EHVTYVHMHN KQPDLDFTPV EPSKMRE YI AYAKTKRPVM SEAVNDYVVQ AYIRLRQDSK REMDSKFSFG QATPRTLLGI IRLSQALAKL RLADMVDIDD VEEALRLV R VSKESLYQET NKSKEDESPT TKIFTIIKKM LQETGKNTLS YENIVKTVRL RGFTMLQLSN CIQEYSYLNV WHLINEGNT LKFVDDGTMD TDQEDSLVST PKLAPQTTAS ANVSAQDSDI DLQDA UniProtKB: DNA replication licensing factor MCM7 |
-Macromolecule #3: DNA replication licensing factor MCM6
Macromolecule | Name: DNA replication licensing factor MCM6 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 113.110211 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSSPFPADTP SSNRPSNSSP PPSSIGAGFG SSSGLDSQIG SRLHFPSSSQ PHVSNSQTGP FVNDSTQFSS QRLQTDGSAT NDMEGNEPA RSFKSRALNH VKKVDDVTGE KVREAFEQFL EDFSVQSTDT GEVEKVYRAQ IEFMKIYDLN TIYIDYQHLS M RENGALAM ...String: MSSPFPADTP SSNRPSNSSP PPSSIGAGFG SSSGLDSQIG SRLHFPSSSQ PHVSNSQTGP FVNDSTQFSS QRLQTDGSAT NDMEGNEPA RSFKSRALNH VKKVDDVTGE KVREAFEQFL EDFSVQSTDT GEVEKVYRAQ IEFMKIYDLN TIYIDYQHLS M RENGALAM AISEQYYRFL PFLQKGLRRV VRKYAPELLN TSDSLKRSEG DEGQADEDEQ QDDDMNGSSL PRDSGSSAAP GN GTSAMAT RSITTSTSPE QTERVFQISF FNLPTVHRIR DIRSEKIGSL LSISGTVTRT SEVRPELYKA SFTCDMCRAI VDN VEQSFK YTEPTFCPNP SCENRAFWTL NVTRSRFLDW QKVRIQENAN EIPTGSMPRT LDVILRGDSV ERAKPGDRCK FTGV EIVVP DVTQLGLPGV KPSSTLDTRG ISKTTEGLNS GVTGLRSLGV RDLTYKISFL ACHVISIGSN IGASSPDANS NNRET ELQM AANLQANNVY QDNERDQEVF LNSLSSDEIN ELKEMVKDEH IYDKLVRSIA PAVFGHEAVK KGILLQMLGG VHKSTV EGI KLRGDINICV VGDPSTSKSQ FLKYVVGFAP RSVYTSGKAS SAAGLTAAVV RDEEGGDYTI EAGALMLADN GICCIDE FD KMDISDQVAI HEAMEQQTIS IAKAGIHATL NARTSILAAA NPVGGRYNRK LSLRGNLNMT APIMSRFDLF FVILDDCN E KIDTELASHI VDLHMKRDEA IEPPFSAEQL RRYIKYARTF KPILTKEARS YLVEKYKELR KDDAQGFSRS SYRITVRQL ESMIRLSEAI ARANCVDEIT PSFIAEAYDL LRQSIIRVDV DDVEMDEEFD NIESQSHAAS GNNDDNDDGT GSGVITSEPP ADIEEGQSE ATARPGTSEK KKTTVTYDKY VSMMNMIVRK IAEVDREGAE ELTAVDIVDW YLLQKENDLG SLAEYWEERR L AFKVIKRL VKDRILMEIH GTRHNLRDLE NEENENNKTV YVIHPNCEVL DQLEPQDSS UniProtKB: DNA replication licensing factor MCM6 |
-Macromolecule #4: Minichromosome maintenance protein 5
Macromolecule | Name: Minichromosome maintenance protein 5 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 86.505734 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSFDRPEIYS APVLQGESPN DDDNTEIIKS FKNFILEFRL DSQFIYRDQL RNNILVKNYS LTVNMEHLIG YNEDIYKKLS DEPSDIIPL FETAITQVAK RISILSRAQS ANNNDKDPEN TSMDTDSLLL NSLPTFQLIL NSNANQIPLR DLDSEHVSKI V RLSGIIIS ...String: MSFDRPEIYS APVLQGESPN DDDNTEIIKS FKNFILEFRL DSQFIYRDQL RNNILVKNYS LTVNMEHLIG YNEDIYKKLS DEPSDIIPL FETAITQVAK RISILSRAQS ANNNDKDPEN TSMDTDSLLL NSLPTFQLIL NSNANQIPLR DLDSEHVSKI V RLSGIIIS TSVLSSRATY LSIMCRNCRH TTSITINNFN SITGNTVSLP RSCLSTIESE SSMANESNIG DESTKKNCGP DP YIIIHES SKFIDQQFLK LQEIPELVPV GEMPRNLTMT CDRYLTNKVI PGTRVTIVGI YSIYNSKNGA GSGRSGGGNG GSG VAIRTP YIKILGIQSD VETSSIWNSV TMFTEEEEEE FLQLSRNPKL YEILTNSIAP SIFGNEDIKK AIVCLLMGGS KKIL PDGMR LRGDINVLLL GDPGTAKSQL LKFVEKVSPI AVYTSGKGSS AAGLTASVQR DPMTREFYLE GGAMVLADGG VVCID EFDK MRDEDRVAIH EAMEQQTISI AKAGITTVLN SRTSVLAAAN PIYGRYDDLK SPGDNIDFQT TILSRFDMIF IVKDDH NEE RDISIANHVI NIHTGNANAM QNQQEENGSE ISIEKMKRYI TYCRLKCAPR LSPQAAEKLS SNFVTIRKQL LINELES TE RSSIPITIRQ LEAIIRITES LAKLELSPIA QERHVDEAIR LFQASTMDAA SQDPIGGLNQ ASGTSLSEIR RFEQELKR R LPIGWSTSYQ TLRREFVDTH RFSQLALDKA LYALEKHETI QLRHQGQNIY RSGV UniProtKB: Minichromosome maintenance protein 5 |
-Macromolecule #5: DNA replication licensing factor MCM4
Macromolecule | Name: DNA replication licensing factor MCM4 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 105.138375 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSQQSSSPTK EDNNSSSPVV PNPDSVPPQL SSPALFYSSS SSQGDIYGRN NSQNLSQGEG NIRAAIGSSP LNFPSSSQRQ NSDVFQSQG RQGRIRSSAS ASGRSRYHSD LRSDRALPTS SSSLGRNGQN RVHMRRNDIH TSDLSSPRRI VDFDTRSGVN T LDTSSSSA ...String: MSQQSSSPTK EDNNSSSPVV PNPDSVPPQL SSPALFYSSS SSQGDIYGRN NSQNLSQGEG NIRAAIGSSP LNFPSSSQRQ NSDVFQSQG RQGRIRSSAS ASGRSRYHSD LRSDRALPTS SSSLGRNGQN RVHMRRNDIH TSDLSSPRRI VDFDTRSGVN T LDTSSSSA PPSEASEPLR IIWGTNVSIQ ECTTNFRNFL MSFKYKFRKI LDEREEFINN TTDEELYYIK QLNEMRELGT SN LNLDARN LLAYKQTEDL YHQLLNYPQE VISIMDQTIK DCMVSLIVDN NLDYDLDEIE TKFYKVRPYN VGSCKGMREL NPN DIDKLI NLKGLVLRST PVIPDMKVAF FKCNVCDHTM AVEIDRGVIQ EPARCERIDC NEPNSMSLIH NRCSFADKQV IKLQ ETPDF VPDGQTPHSI SLCVYDELVD SCRAGDRIEV TGTFRSIPIR ANSRQRVLKS LYKTYVDVVH VKKVSDKRLD VDTST IEQE LMQNKVDHNE VEEVRQITDQ DLAKIREVAA REDLYSLLAR SIAPSIYELE DVKKGILLQL FGGTNKTFTK GGRYRG DIN ILLCGDPSTS KSQILQYVHK ITPRGVYTSG KGSSAVGLTA YITRDVDTKQ LVLESGALVL SDGGVCCIDE FDKMSDS TR SVLHEVMEQQ TISIAKAGII TTLNARSSIL ASANPIGSRY NPNLPVTENI DLPPPLLSRF DLVYLVLDKV DEKNDREL A KHLTNLYLED KPEHISQDDV LPVEFLTMYI SYAKEHIHPI ITEAAKTELV RAYVGMRKMG DDSRSDEKRI TATTRQLES MIRLAEAHAK MKLKNVVELE DVQEAVRLIR SAIKDYATDP KTGKIDMNLV QTGKSVIQRK LQEDLSREIM NVLKDQASDS MSFNELIKQ INEHSQDRVE SSDIQEALSR LQQEDKVIVL GEGVRRSVRL NNRV UniProtKB: DNA replication licensing factor MCM4 |
-Macromolecule #6: DNA replication licensing factor MCM3
Macromolecule | Name: DNA replication licensing factor MCM3 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 107.653508 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MEGSTGFDGD ATTFFAPDAV FGDRVRRFQE FLDTFTSYRD SVRSIQVYNS NNAANYNDDQ DDADERDLLG DDDGDDLEKE KKAASSTSL NILPHRIIIS LDDLREFDRS FWSGILVEPA YFIPPAEKAL TDLADSMDDV PHPNASAVSS RHPWKLSFKG S FGAHALSP ...String: MEGSTGFDGD ATTFFAPDAV FGDRVRRFQE FLDTFTSYRD SVRSIQVYNS NNAANYNDDQ DDADERDLLG DDDGDDLEKE KKAASSTSL NILPHRIIIS LDDLREFDRS FWSGILVEPA YFIPPAEKAL TDLADSMDDV PHPNASAVSS RHPWKLSFKG S FGAHALSP RTLTAQHLNK LVSVEGIVTK TSLVRPKLIR SVHYAAKTGR FHYRDYTDAT TTLTTRIPTP AIYPTEDTEG NK LTTEYGY STFIDHQRIT VQEMPEMAPA GQLPRSIDVI LDDDLVDKTK PGDRVNVVGV FKSLGAGGMN QSNSNTLIGF KTL ILGNTV YPLHARSTGV AARQMLTDFD IRNINKLSKK KDIFDILSQS LAPSIYGHDH IKKAILLMLM GGVEKNLENG SHLR GDINI LMVGDPSTAK SQLLRFVLNT ASLAIATTGR GSSGVGLTAA VTTDRETGER RLEAGAMVLA DRGVVCIDEF DKMTD VDRV AIHEVMEQQT VTIAKAGIHT TLNARCSVIA AANPVFGQYD VNRDPHQNIA LPDSLLSRFD LLFVVTDDIN EIRDRS ISE HVLRTHRYLP PGYLEGEPVR ERLNLSLAVG EDADINPEEH SNSGAGVENE GEDDEDHVFE KFNPLLQAGA KLAKNKG NY NGTEIPKLVT IPFLRKYVQY AKERVIPQLT QEAINVIVKN YTDLRNDDNT KKSPITARTL ETLIRLATAH AKVRLSKT V NKVDAKVAAN LLRFALLGED IGNDIDEEES EYEEALSKRS PQKSPKKRQR VRQPASNSGS PIKSTPRRST ASSVNATPS SARRILRFQD DEQNAGEDDN DIMSPLPADE EAELQRRLQL GLRVSPRRRE HLHAPEEGSS GPLTEVGTPR LPNVSSAGQD DEQQQSVIS FDNVEPGTIS TGRLSLISGI IARLMQTEIF EEESYPVASL FERINEELPE EEKFSAQEYL AGLKIMSDRN N LMVADDKV WRV UniProtKB: DNA replication licensing factor MCM3 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Grid | Details: unspecified |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: PDB ENTRY |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 7.7 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 24072 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |
-Atomic model buiding 1
Refinement | Protocol: RIGID BODY FIT |
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Output model | ![]() PDB-6wgf: |