+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-4581 | ||||||||||||
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Title | Structure of inner kinetochore CCAN complex with mask1 | ||||||||||||
Map data | Map of CCAN with mask1 | ||||||||||||
Sample |
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Keywords | inner kinetochore / CCAN / DNA BINDING PROTEIN | ||||||||||||
Function / homology | Function and homology information negative regulation of meiotic DNA double-strand break formation involved in reciprocal meiotic recombination / COMA complex / maintenance of meiotic sister chromatid cohesion / Mis6-Sim4 complex / meiotic sister chromatid segregation / centromere complex assembly / establishment of meiotic sister chromatid cohesion / ascospore formation / attachment of spindle microtubules to kinetochore / CENP-A containing chromatin assembly ...negative regulation of meiotic DNA double-strand break formation involved in reciprocal meiotic recombination / COMA complex / maintenance of meiotic sister chromatid cohesion / Mis6-Sim4 complex / meiotic sister chromatid segregation / centromere complex assembly / establishment of meiotic sister chromatid cohesion / ascospore formation / attachment of spindle microtubules to kinetochore / CENP-A containing chromatin assembly / outer kinetochore / protein localization to chromosome, centromeric region / establishment of mitotic sister chromatid cohesion / kinetochore assembly / protein localization to kinetochore / spindle pole body / mitotic spindle assembly checkpoint signaling / meiotic cell cycle / chromosome segregation / kinetochore / cell division / structural molecule activity / nucleus / cytoplasm Similarity search - Function | ||||||||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.45 Å | ||||||||||||
Authors | Yan K / Yang J | ||||||||||||
Funding support | United Kingdom, 3 items
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Citation | Journal: Nature / Year: 2019 Title: Structure of the inner kinetochore CCAN complex assembled onto a centromeric nucleosome. Authors: Kaige Yan / Jing Yang / Ziguo Zhang / Stephen H McLaughlin / Leifu Chang / Domenico Fasci / Ann E Ehrenhofer-Murray / Albert J R Heck / David Barford / Abstract: In eukaryotes, accurate chromosome segregation in mitosis and meiosis maintains genome stability and prevents aneuploidy. Kinetochores are large protein complexes that, by assembling onto specialized ...In eukaryotes, accurate chromosome segregation in mitosis and meiosis maintains genome stability and prevents aneuploidy. Kinetochores are large protein complexes that, by assembling onto specialized Cenp-A nucleosomes, function to connect centromeric chromatin to microtubules of the mitotic spindle. Whereas the centromeres of vertebrate chromosomes comprise millions of DNA base pairs and attach to multiple microtubules, the simple point centromeres of budding yeast are connected to individual microtubules. All 16 budding yeast chromosomes assemble complete kinetochores using a single Cenp-A nucleosome (Cenp-A), each of which is perfectly centred on its cognate centromere. The inner and outer kinetochore modules are responsible for interacting with centromeric chromatin and microtubules, respectively. Here we describe the cryo-electron microscopy structure of the Saccharomyces cerevisiae inner kinetochore module, the constitutive centromere associated network (CCAN) complex, assembled onto a Cenp-A nucleosome (CCAN-Cenp-A). The structure explains the interdependency of the constituent subcomplexes of CCAN and shows how the Y-shaped opening of CCAN accommodates Cenp-A to enable specific CCAN subunits to contact the nucleosomal DNA and histone subunits. Interactions with the unwrapped DNA duplex at the two termini of Cenp-A are mediated predominantly by a DNA-binding groove in the Cenp-L-Cenp-N subcomplex. Disruption of these interactions impairs assembly of CCAN onto Cenp-A. Our data indicate a mechanism of Cenp-A nucleosome recognition by CCAN and how CCAN acts as a platform for assembly of the outer kinetochore to link centromeres to the mitotic spindle for chromosome segregation. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_4581.map.gz | 8.2 MB | EMDB map data format | |
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Header (meta data) | emd-4581-v30.xml emd-4581.xml | 19.3 KB 19.3 KB | Display Display | EMDB header |
Images | emd_4581.png | 40.6 KB | ||
Filedesc metadata | emd-4581.cif.gz | 7 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-4581 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-4581 | HTTPS FTP |
-Validation report
Summary document | emd_4581_validation.pdf.gz | 189.9 KB | Display | EMDB validaton report |
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Full document | emd_4581_full_validation.pdf.gz | 189.5 KB | Display | |
Data in XML | emd_4581_validation.xml.gz | 502 B | Display | |
Data in CIF | emd_4581_validation.cif.gz | 371 B | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4581 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4581 | HTTPS FTP |
-Related structure data
Related structure data | 6qlfMC 4579C 4580C 4971C 6qldC 6qleC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_4581.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Map of CCAN with mask1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.09 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Inner kinetochore CCAN complex
Entire | Name: Inner kinetochore CCAN complex |
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Components |
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-Supramolecule #1: Inner kinetochore CCAN complex
Supramolecule | Name: Inner kinetochore CCAN complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
-Macromolecule #1: Inner kinetochore subunit IML3
Macromolecule | Name: Inner kinetochore subunit IML3 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 28.093223 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MPYTWKFLGI SKQLSLENGI AKLNQLLNLE VDLDIQTIRV PSDPDGGTAA DEYIRYEMRL DISNLDEGTY SKFIFLGNSK MEVPMFLCY CGTDNRNEVV LQWLKAEYGV IMWPIKFEQK TMIKLADASI VHVTKENIEQ ITWFSSKLYF EPETQDKNLR Q FSIEIPRE ...String: MPYTWKFLGI SKQLSLENGI AKLNQLLNLE VDLDIQTIRV PSDPDGGTAA DEYIRYEMRL DISNLDEGTY SKFIFLGNSK MEVPMFLCY CGTDNRNEVV LQWLKAEYGV IMWPIKFEQK TMIKLADASI VHVTKENIEQ ITWFSSKLYF EPETQDKNLR Q FSIEIPRE SCEGLALGYG NTMHPYNDAI VPYIYNETGM AVERLPLTSV ILAGHTKIMR ESIVTSTRSL RNRVLAVVLQ SI QFTSE UniProtKB: Inner kinetochore subunit IML3 |
-Macromolecule #2: Inner kinetochore subunit CHL4
Macromolecule | Name: Inner kinetochore subunit CHL4 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 53.538566 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MSNELRLEDN YVPTSDTLVV FKQLMKLPVT VLYDLTLSWF AKFGGSFDGD IYLLTETLDL LIEKGVRRNV IVNRILYVYW PDGLNVFQL AEIDCHLMIS KPEKFKWLPS KALRGDGKPY VVKLQPAKFI ENLQTDLAKI YHCHVYMFKH PSLPVLITRI Q LFDSNNLF ...String: MSNELRLEDN YVPTSDTLVV FKQLMKLPVT VLYDLTLSWF AKFGGSFDGD IYLLTETLDL LIEKGVRRNV IVNRILYVYW PDGLNVFQL AEIDCHLMIS KPEKFKWLPS KALRGDGKPY VVKLQPAKFI ENLQTDLAKI YHCHVYMFKH PSLPVLITRI Q LFDSNNLF LSTPNIGSIN KESLYNKLDK FQGKPLISRR PYYVAFPLNS PIIFHSVDKD IYARLVLQSI SRTISERETI IF KPVQKIP VKSIHNIMTL LGPSRFAESM GPWECYASAN FERSPLHDYK KHQGLTGKKV MVREFDDSFL NDDENFYGKE EPE IRRLRL EKNMIKFKGS ANGVMDQKYN DLKEFNEHVH NIRNGKKNED SGEPVYISRY SSLVPIEKVG FTLKNEINSR IITI KLKFN GNDIFGGLHE LCDKNLINID KVPGWLAGEN GSFSGTIMNG DFQREQVAKG GLLENLYFQ UniProtKB: Inner kinetochore subunit CHL4 |
-Macromolecule #3: Inner kinetochore subunit MCM21
Macromolecule | Name: Inner kinetochore subunit MCM21 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 43.028879 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MSRIDDLQQD IESLLSEINS LEESREKLKA KIKDKRKNEE SANPIVQEFE DLFDQFPQLN NFLFNEHPEL EETDDKDISR AQADIPATP IPYEPKKRAK LENEEILPEQ EWVLKTQPMV QHQMFDPGVA DLLDTDILTS PSKRKRKLKI DDISTSDRSE L EDYIVLEN ...String: MSRIDDLQQD IESLLSEINS LEESREKLKA KIKDKRKNEE SANPIVQEFE DLFDQFPQLN NFLFNEHPEL EETDDKDISR AQADIPATP IPYEPKKRAK LENEEILPEQ EWVLKTQPMV QHQMFDPGVA DLLDTDILTS PSKRKRKLKI DDISTSDRSE L EDYIVLEN VYRMFGITFF PLVDPIDLKI KDASGEIFVD REMLGIRLEV FSERTSQFEK PHYVLLKKRI KSNSWFLFKH TI PSFIDVQ GIFDDTNGGL VISHDDAYLF AKRVFLQLVE VQKRRQIFKD LEAKKIIHDL DLDLESSMVS FFVKDIKVEL FVK QNEIVS CSILDDIHDF SQNNKSKWEI ALLGSLDDLE LKLNHSFATI FK UniProtKB: Inner kinetochore subunit MCM21 |
-Macromolecule #4: Inner kinetochore subunit CTF19
Macromolecule | Name: Inner kinetochore subunit CTF19 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 42.841113 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MDFTSDTTNS HDTSNSHLSL EDAVGTHHAG EADVNIDGDE KQQLSLLDDD QVRALKLQEE KDALLTRRNT LLQEIQTYQN ILMKENNSK TKNGDILQND ITQDFLNLIS ISSSNPNSAI SDRKRVERIN GLTNLQKELV TKYDTLPLLN MNLRLSYLRD H TYPHLQVS ...String: MDFTSDTTNS HDTSNSHLSL EDAVGTHHAG EADVNIDGDE KQQLSLLDDD QVRALKLQEE KDALLTRRNT LLQEIQTYQN ILMKENNSK TKNGDILQND ITQDFLNLIS ISSSNPNSAI SDRKRVERIN GLTNLQKELV TKYDTLPLLN MNLRLSYLRD H TYPHLQVS VQSRDRVHND GIEVLVVNYK FCRNTMNPFE IQFKMFYKFE DSTLLKWEIL RISTNVRLKA KQLLATRNFQ KC LLSLYEF DKIKSKKTGI FQNLINLLKR KTRCYLMNNS DSLIVERVIR EGRLTTIKLQ INFIITMPGE RGKPRNCFLP MSK ISIALW KGGERFNQID LDEICYGLIK EYGVKTGLKE ICNVCLFPDM YAR UniProtKB: Inner kinetochore subunit CTF19 |
-Macromolecule #5: Inner kinetochore subunit OKP1
Macromolecule | Name: Inner kinetochore subunit OKP1 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 47.427246 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MAADRDNFLQ NIENDSINNG QAMDLSPNRS SSESDSSILM NVNDIKTLRL DVAPEAKSTQ SKKSLFYENS DDAEEGEIEE RTNKEEGQY HHKGSKQLRF EVGKESTGKL QSHLSDGSAT SGEGNVRPWE FRKVIQAEYR ERLPRNYELK HWKKPSKIMI G SILRLLET ...String: MAADRDNFLQ NIENDSINNG QAMDLSPNRS SSESDSSILM NVNDIKTLRL DVAPEAKSTQ SKKSLFYENS DDAEEGEIEE RTNKEEGQY HHKGSKQLRF EVGKESTGKL QSHLSDGSAT SGEGNVRPWE FRKVIQAEYR ERLPRNYELK HWKKPSKIMI G SILRLLET NTVSALDSVF EKYEKEMNQM THGDNNEVKR IYSKKERLLE IILTKIKKKL RQAKFPSRIS ERDLDIEYIY SK RQFIQNR YSQELQNNER LEAILSREQN LLEETRKLCM NLKTNNKKRL TEKLIQKDLH PVLNKAMEYT YGLESTNGFM HPD GPVTFR NDSHELNLML NDPIKSTADV RLDKEEVLSL LPSLKEYTKK SKELKETMGQ MISDSHEEEI KEVFVPHHES HQDK TEEDI H UniProtKB: Inner kinetochore subunit OKP1 |
-Macromolecule #6: Inner kinetochore subunit AME1
Macromolecule | Name: Inner kinetochore subunit AME1 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 37.081246 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MDRDTKLAFR LRGSHSRRTD DIDDDVIVFK TPNAVYREEN SPIQSPVQPI LSSPKLANSF EFPITTNNVN AQDRHEHGYQ PLDAEDYPM IDSENKSLIS ESPQNVRNDE DLTTRYNFDD IPIRQLSSSI TSVTTIDVLS SLFINLFEND LIPQALKDFN K SDDDQFRK ...String: MDRDTKLAFR LRGSHSRRTD DIDDDVIVFK TPNAVYREEN SPIQSPVQPI LSSPKLANSF EFPITTNNVN AQDRHEHGYQ PLDAEDYPM IDSENKSLIS ESPQNVRNDE DLTTRYNFDD IPIRQLSSSI TSVTTIDVLS SLFINLFEND LIPQALKDFN K SDDDQFRK LLYKLDLRLF QTISDQMTRD LKDILDINVS NNELCYQLKQ VLARKEDLNQ QIISVRNEIQ ELKAGKDWHD LQ NEQAKLN DKVKLNKRLN DLTSTLLGKY EGDRKIMSQD SEDDSIRDDS NILDIAHFVD LMDPYNGLLK KINKINENLS NEL UniProtKB: Inner kinetochore subunit AME1 |
-Macromolecule #7: Inner kinetochore subunit NKP1
Macromolecule | Name: Inner kinetochore subunit NKP1 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 27.006451 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MTDTYNSISN FIENELTALL SSDDYLMDDL AGELPNEVCR LLKAQVIEKR KDAMSRGKQD LLSKEIYDNE SELRASQSQQ IMELVGDIP KYSLGSELRN RVEGEPQSTS IERLIEDVLK LPQMEVADEE EVEVENDLKV LSEYSNLRKD LILKCQALQI G ESKLSDIL ...String: MTDTYNSISN FIENELTALL SSDDYLMDDL AGELPNEVCR LLKAQVIEKR KDAMSRGKQD LLSKEIYDNE SELRASQSQQ IMELVGDIP KYSLGSELRN RVEGEPQSTS IERLIEDVLK LPQMEVADEE EVEVENDLKV LSEYSNLRKD LILKCQALQI G ESKLSDIL SQTNSINSLT TSIKEASEDD DISEYFATYN GKLVVALEEM KLLLEEAVKT FGNSPEKREK IKKILSELKK UniProtKB: Inner kinetochore subunit NKP1 |
-Macromolecule #8: Inner kinetochore subunit NKP2
Macromolecule | Name: Inner kinetochore subunit NKP2 / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Molecular weight | Theoretical: 17.877033 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MNSEQLLHNY VSDSLLTTLI SFQEFKQQLQ SYTSDEQQLQ HWYELLQARD ARVTSELEAR IKQFFITLRS RLLRFLESEQ LSHSLSLET LIDALYKIND LLQQRLQILD DAIQEKTSEL AEFENMVRSP SAGDNAIPGL LQIIQSYINL LEEN UniProtKB: Inner kinetochore subunit NKP2 |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 1.0 mg/mL |
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Buffer | pH: 8 |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average electron dose: 32.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: OTHER / Details: Reconstruction using SIMPLE_prime |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.45 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 465029 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |