+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-33197 | |||||||||
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Title | Structure of human inner kinetochore CCAN complex | |||||||||
Map data | ||||||||||
Sample |
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Keywords | CELL CYCLE | |||||||||
Function / homology | Function and homology information FANCM-MHF complex / Mis6-Sim4 complex / positive regulation of protein localization to kinetochore / centromere complex assembly / kinetochore organization / Fanconi anaemia nuclear complex / spindle attachment to meiosis I kinetochore / metaphase chromosome alignment / kinetochore binding / centromeric DNA binding ...FANCM-MHF complex / Mis6-Sim4 complex / positive regulation of protein localization to kinetochore / centromere complex assembly / kinetochore organization / Fanconi anaemia nuclear complex / spindle attachment to meiosis I kinetochore / metaphase chromosome alignment / kinetochore binding / centromeric DNA binding / sex differentiation / CENP-A containing chromatin assembly / resolution of meiotic recombination intermediates / chordate embryonic development / negative regulation of epithelial cell apoptotic process / kinetochore assembly / attachment of mitotic spindle microtubules to kinetochore / inner kinetochore / condensed chromosome, centromeric region / replication fork processing / mitotic sister chromatid segregation / centriolar satellite / chromosome, centromeric region / chromosome organization / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / pericentric heterochromatin / interstrand cross-link repair / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Deposition of new CENPA-containing nucleosomes at the centromere / Resolution of Sister Chromatid Cohesion / NRIF signals cell death from the nucleus / mitotic spindle organization / positive regulation of epithelial cell proliferation / positive regulation of protein ubiquitination / chromosome segregation / RHO GTPases Activate Formins / Fanconi Anemia Pathway / PKR-mediated signaling / kinetochore / nuclear matrix / Separation of Sister Chromatids / actin cytoskeleton / mitotic cell cycle / chromosome / midbody / nuclear body / cell adhesion / protein heterodimerization activity / cell division / DNA repair / DNA damage response / chromatin binding / regulation of DNA-templated transcription / chromatin / nucleolus / apoptotic process / signal transduction / DNA binding / nucleoplasm / identical protein binding / membrane / nucleus / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.29 Å | |||||||||
Authors | Tian T / Wang CL / Yang ZS / Sun LF / Zang JY | |||||||||
Funding support | China, 1 items
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Citation | Journal: Cell Discov / Year: 2022 Title: Structural insights into human CCAN complex assembled onto DNA. Authors: Tian Tian / Lili Chen / Zhen Dou / Zhisen Yang / Xinjiao Gao / Xiao Yuan / Chengliang Wang / Ran Liu / Zuojun Shen / Ping Gui / Maikun Teng / Xianlei Meng / Donald L Hill / Lin Li / Xuan ...Authors: Tian Tian / Lili Chen / Zhen Dou / Zhisen Yang / Xinjiao Gao / Xiao Yuan / Chengliang Wang / Ran Liu / Zuojun Shen / Ping Gui / Maikun Teng / Xianlei Meng / Donald L Hill / Lin Li / Xuan Zhang / Xing Liu / Linfeng Sun / Jianye Zang / Xuebiao Yao / Abstract: In mitosis, accurate chromosome segregation depends on kinetochores that connect centromeric chromatin to spindle microtubules. The centromeres of budding yeast, which are relatively simple, are ...In mitosis, accurate chromosome segregation depends on kinetochores that connect centromeric chromatin to spindle microtubules. The centromeres of budding yeast, which are relatively simple, are connected to individual microtubules via a kinetochore constitutive centromere associated network (CCAN). However, the complex centromeres of human chromosomes comprise millions of DNA base pairs and attach to multiple microtubules. Here, by use of cryo-electron microscopy and functional analyses, we reveal the molecular basis of how human CCAN interacts with duplex DNA and facilitates accurate chromosome segregation. The overall structure relates to the cooperative interactions and interdependency of the constituent sub-complexes of the CCAN. The duplex DNA is topologically entrapped by human CCAN. Further, CENP-N does not bind to the RG-loop of CENP-A but to DNA in the CCAN complex. The DNA binding activity is essential for CENP-LN localization to centromere and chromosome segregation during mitosis. Thus, these analyses provide new insights into mechanisms of action underlying kinetochore assembly and function in mitosis. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_33197.map.gz | 109.4 MB | EMDB map data format | |
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Header (meta data) | emd-33197-v30.xml emd-33197.xml | 34 KB 34 KB | Display Display | EMDB header |
Images | emd_33197.png | 111 KB | ||
Filedesc metadata | emd-33197.cif.gz | 9.4 KB | ||
Others | emd_33197_half_map_1.map.gz emd_33197_half_map_2.map.gz | 107.7 MB 107.7 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-33197 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-33197 | HTTPS FTP |
-Validation report
Summary document | emd_33197_validation.pdf.gz | 788.8 KB | Display | EMDB validaton report |
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Full document | emd_33197_full_validation.pdf.gz | 788.4 KB | Display | |
Data in XML | emd_33197_validation.xml.gz | 13.9 KB | Display | |
Data in CIF | emd_33197_validation.cif.gz | 16.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-33197 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-33197 | HTTPS FTP |
-Related structure data
Related structure data | 7xhoMC 7xhnC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_33197.map.gz / Format: CCP4 / Size: 115.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.22 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_33197_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_33197_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : CCAN
+Supramolecule #1: CCAN
+Macromolecule #1: Centromere protein C
+Macromolecule #2: Centromere protein H
+Macromolecule #3: Centromere protein I
+Macromolecule #4: Centromere protein K
+Macromolecule #5: Centromere protein L
+Macromolecule #6: Centromere protein M
+Macromolecule #7: Centromere protein N
+Macromolecule #8: Centromere protein O
+Macromolecule #9: Centromere protein P
+Macromolecule #10: Centromere protein Q
+Macromolecule #11: Centromere protein S
+Macromolecule #12: Centromere protein T
+Macromolecule #13: CENP-W
+Macromolecule #14: Centromere protein X
+Macromolecule #15: Centromere protein R
+Macromolecule #16: Centromere protein U
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: DIFFRACTION / Nominal defocus max: 2.7 µm / Nominal defocus min: 1.7 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: OTHER |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.29 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 200560 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |