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- EMDB-26330: Cryo-EM structure of CENP-A nucleosome (palindromic alpha satelli... -

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Basic information

Entry
Database: EMDB / ID: EMD-26330
TitleCryo-EM structure of CENP-A nucleosome (palindromic alpha satellite DNA) in complex with CENP-N
Map data
Sample
  • Complex: CENP-A nucleosome with kinetochore protein CENP-N
    • Protein or peptide: Histone H3-like centromeric protein A
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A
    • Protein or peptide: Histone H2B type 1-C/E/F/G/I
    • Protein or peptide: Centromere protein N
    • DNA: DNA (147-MER)
    • DNA: DNA (147-MER)
Keywordsnucleosome / CENP-A / kinetochore / CENP-N / DNA BINDING PROTEIN-DNA complex
Function / homology
Function and homology information


CENP-A containing chromatin assembly / protein localization to chromosome, centromeric region / kinetochore assembly / inner kinetochore / condensed chromosome, centromeric region / establishment of mitotic spindle orientation / protein localization to CENP-A containing chromatin / CENP-A containing nucleosome / mitotic cytokinesis / chromosome, centromeric region ...CENP-A containing chromatin assembly / protein localization to chromosome, centromeric region / kinetochore assembly / inner kinetochore / condensed chromosome, centromeric region / establishment of mitotic spindle orientation / protein localization to CENP-A containing chromatin / CENP-A containing nucleosome / mitotic cytokinesis / chromosome, centromeric region / Replacement of protamines by nucleosomes in the male pronucleus / arachidonate 15-lipoxygenase / arachidonate 15-lipoxygenase activity / Packaging Of Telomere Ends / lipoxygenase pathway / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / pericentric heterochromatin / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / arachidonate metabolic process / lipid oxidation / Deposition of new CENPA-containing nucleosomes at the centromere / hepoxilin biosynthetic process / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / linoleic acid metabolic process / Meiotic synapsis / Inhibition of DNA recombination at telomere / nucleosomal DNA binding / Resolution of Sister Chromatid Cohesion / RNA Polymerase I Promoter Opening / Assembly of the ORC complex at the origin of replication / DNA methylation / Condensation of Prophase Chromosomes / HCMV Late Events / SIRT1 negatively regulates rRNA expression / Chromatin modifications during the maternal to zygotic transition (MZT) / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / Defective pyroptosis / Meiotic recombination / innate immune response in mucosa / DNA Damage/Telomere Stress Induced Senescence / HDACs deacetylate histones / Nonhomologous End-Joining (NHEJ) / chromosome segregation / RNA Polymerase I Promoter Escape / RHO GTPases Activate Formins / Transcriptional regulation by small RNAs / Transcriptional regulation of granulopoiesis / Formation of the beta-catenin:TCF transactivating complex / HCMV Early Events / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / G2/M DNA damage checkpoint / NoRC negatively regulates rRNA expression / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / B-WICH complex positively regulates rRNA expression / heterochromatin formation / RMTs methylate histone arginines / Pre-NOTCH Transcription and Translation / Metalloprotease DUBs / Activation of anterior HOX genes in hindbrain development during early embryogenesis / structural constituent of chromatin / Separation of Sister Chromatids / UCH proteinases / nucleosome / antimicrobial humoral immune response mediated by antimicrobial peptide / Processing of DNA double-strand break ends / nucleosome assembly / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / E3 ubiquitin ligases ubiquitinate target proteins / Senescence-Associated Secretory Phenotype (SASP) / RUNX1 regulates transcription of genes involved in differentiation of HSCs / HATs acetylate histones / antibacterial humoral response / Oxidative Stress Induced Senescence / Estrogen-dependent gene expression / Ub-specific processing proteases / defense response to Gram-positive bacterium / protein heterodimerization activity / Amyloid fiber formation / negative regulation of cell population proliferation / chromatin binding / DNA binding / extracellular space / extracellular exosome / nucleoplasm / identical protein binding / nucleus / metal ion binding / cytosol
Similarity search - Function
: / Centromere protein Chl4/mis15/CENP-N / Kinetochore protein CHL4 like / Lipoxygenase, iron binding site / Lipoxygenases iron-binding region signature 1. / Lipoxygenase / Lipoxygenase, C-terminal / Lipoxigenase, C-terminal domain superfamily / Lipoxygenase / Lipoxygenase iron-binding catalytic domain profile. ...: / Centromere protein Chl4/mis15/CENP-N / Kinetochore protein CHL4 like / Lipoxygenase, iron binding site / Lipoxygenases iron-binding region signature 1. / Lipoxygenase / Lipoxygenase, C-terminal / Lipoxigenase, C-terminal domain superfamily / Lipoxygenase / Lipoxygenase iron-binding catalytic domain profile. / Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone H2A / Histone 2A / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 / Histone-fold
Similarity search - Domain/homology
Histone H3-like centromeric protein A / Arachidonate 15-lipoxygenase / Histone H2B type 1-C/E/F/G/I / Histone H2A type 1-C / Centromere protein N
Similarity search - Component
Biological speciesHomo sapiens (human) / Escherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.68 Å
AuthorsZhou K / Luger K
Funding support United States, 1 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Nat Struct Mol Biol / Year: 2022
Title: CENP-N promotes the compaction of centromeric chromatin.
Authors: Keda Zhou / Magdalena Gebala / Dustin Woods / Kousik Sundararajan / Garrett Edwards / Dan Krzizike / Jeff Wereszczynski / Aaron F Straight / Karolin Luger /
Abstract: The histone variant CENP-A is the epigenetic determinant for the centromere, where it is interspersed with canonical H3 to form a specialized chromatin structure that nucleates the kinetochore. How ...The histone variant CENP-A is the epigenetic determinant for the centromere, where it is interspersed with canonical H3 to form a specialized chromatin structure that nucleates the kinetochore. How nucleosomes at the centromere arrange into higher order structures is unknown. Here we demonstrate that the human CENP-A-interacting protein CENP-N promotes the stacking of CENP-A-containing mononucleosomes and nucleosomal arrays through a previously undefined interaction between the α6 helix of CENP-N with the DNA of a neighboring nucleosome. We describe the cryo-EM structures and biophysical characterization of such CENP-N-mediated nucleosome stacks and nucleosomal arrays and demonstrate that this interaction is responsible for the formation of densely packed chromatin at the centromere in the cell. Our results provide first evidence that CENP-A, together with CENP-N, promotes specific chromatin higher order structure at the centromere.
History
DepositionFeb 28, 2022-
Header (metadata) releaseMar 16, 2022-
Map releaseMar 16, 2022-
UpdateFeb 21, 2024-
Current statusFeb 21, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.13
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.13
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7u46
  • Surface level: 0.13
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_26330.png

Downloads & links

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Map

FileDownload / File: emd_26330.map.gz / Format: CCP4 / Size: 163.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.8211 Å
Density
Contour LevelBy AUTHOR: 0.13 / Movie #1: 0.13
Minimum - Maximum-0.89046985 - 1.7236588
Average (Standard dev.)0.00081436225 (±0.030027369)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions350350350
Spacing350350350
CellA=B=C: 287.385 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.82110.82110.8211
M x/y/z350350350
origin x/y/z0.0000.0000.000
length x/y/z287.385287.385287.385
α/β/γ90.00090.00090.000
start NX/NY/NZ139118109
NX/NY/NZ123164187
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS350350350
D min/max/mean-0.8901.7240.001

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Supplemental data

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Mask #1

Fileemd_26330_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_26330_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_26330_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : CENP-A nucleosome with kinetochore protein CENP-N

EntireName: CENP-A nucleosome with kinetochore protein CENP-N
Components
  • Complex: CENP-A nucleosome with kinetochore protein CENP-N
    • Protein or peptide: Histone H3-like centromeric protein A
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A
    • Protein or peptide: Histone H2B type 1-C/E/F/G/I
    • Protein or peptide: Centromere protein N
    • DNA: DNA (147-MER)
    • DNA: DNA (147-MER)

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Supramolecule #1: CENP-A nucleosome with kinetochore protein CENP-N

SupramoleculeName: CENP-A nucleosome with kinetochore protein CENP-N / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Histone H3-like centromeric protein A

MacromoleculeName: Histone H3-like centromeric protein A / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 16.02363 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MGPRRRSRKP EAPRRRSPSP TPTPGPSRRG PSLGASSHQH SRRRQGWLKE IRKLQKSTHL LIRKLPFSRL AREICVKFTR GVDFNWQAQ ALLALQEAAE AFLVHLFEDA YLLTLHAGRV TLFPKDVQLA RRIRGLEEGL G

UniProtKB: Histone H3-like centromeric protein A

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Macromolecule #2: Histone H4

MacromoleculeName: Histone H4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 11.394426 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MSGRGKGGKG LGKGGAKRHR KVLRDNIQGI TKPAIRRLAR RGGVKRISGL IYEETRGVLK VFLENVIRDA VTYTEHAKRK TVTAMDVVY ALKRQGRTLY GFGG

UniProtKB: Arachidonate 15-lipoxygenase

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Macromolecule #3: Histone H2A

MacromoleculeName: Histone H2A / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 14.135523 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MSGRGKQGGK ARAKAKSRSS RAGLQFPVGR VHRLLRKGNY AERVGAGAPV YLAAVLEYLT AEILELAGNA ARDNKKTRII PRHLQLAIR NDEELNKLLG RVTIAQGGVL PNIQAVLLPK KTESHHKAKG K

UniProtKB: Histone H2A type 1-C

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Macromolecule #4: Histone H2B type 1-C/E/F/G/I

MacromoleculeName: Histone H2B type 1-C/E/F/G/I / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.937213 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MPEPAKSAPA PKKGSKKAVT KAQKKDGKKR KRSRKESYSV YVYKVLKQVH PDTGISSKAM GIMNSFVNDI FERIAGEASR LAHYNKRST ITSREIQTAV RLLLPGELAK HAVSEGTKAV TKYTSSK

UniProtKB: Histone H2B type 1-C/E/F/G/I

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Macromolecule #5: Centromere protein N

MacromoleculeName: Centromere protein N / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 34.870695 KDa
Recombinant expressionOrganism: Insect cell expression vector pTIE1 (others)
SequenceString: MDETVAEFIK RTILKIPMNE LTTILKAWDF LSENQLQTVN FRQRKESVVQ HLIHLCEEKR ASISDAALLD IIYMQFHQHQ KVWDVFQMS KGPGEDVDLF DMKQFKNSFK KILQRALKNV TVSFRETEEN AVWIRIAWGT QYTKPNQYKP TYVVYYSQTP Y AFTSSSML ...String:
MDETVAEFIK RTILKIPMNE LTTILKAWDF LSENQLQTVN FRQRKESVVQ HLIHLCEEKR ASISDAALLD IIYMQFHQHQ KVWDVFQMS KGPGEDVDLF DMKQFKNSFK KILQRALKNV TVSFRETEEN AVWIRIAWGT QYTKPNQYKP TYVVYYSQTP Y AFTSSSML RRNTPLLGQA LTIASKHHQI VKMDLRSRYL DSLKAIVFKQ YNQTFETHNS TTPLQERSLG LDINMDSRII HE NIVEKER VQRITQETFG DYPQPQLEFA QYKLETKFKS GLNGSILAER EEHHHHHH

UniProtKB: Centromere protein N

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Macromolecule #6: DNA (147-MER)

MacromoleculeName: DNA (147-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 45.368051 KDa
SequenceString: (DA)(DT)(DC)(DA)(DA)(DT)(DA)(DT)(DC)(DC) (DA)(DC)(DC)(DT)(DG)(DC)(DA)(DG)(DA)(DT) (DA)(DC)(DT)(DA)(DC)(DC)(DA)(DA)(DA) (DA)(DG)(DT)(DG)(DT)(DA)(DT)(DT)(DT)(DG) (DG) (DA)(DA)(DA)(DC)(DT)(DG) ...String:
(DA)(DT)(DC)(DA)(DA)(DT)(DA)(DT)(DC)(DC) (DA)(DC)(DC)(DT)(DG)(DC)(DA)(DG)(DA)(DT) (DA)(DC)(DT)(DA)(DC)(DC)(DA)(DA)(DA) (DA)(DG)(DT)(DG)(DT)(DA)(DT)(DT)(DT)(DG) (DG) (DA)(DA)(DA)(DC)(DT)(DG)(DC)(DT) (DC)(DC)(DA)(DT)(DC)(DA)(DA)(DA)(DA)(DG) (DG)(DC) (DA)(DT)(DG)(DT)(DT)(DC)(DA) (DG)(DC)(DT)(DG)(DG)(DA)(DA)(DT)(DC)(DC) (DA)(DG)(DC) (DT)(DG)(DA)(DA)(DC)(DA) (DT)(DG)(DC)(DC)(DT)(DT)(DT)(DT)(DG)(DA) (DT)(DG)(DG)(DA) (DG)(DC)(DA)(DG)(DT) (DT)(DT)(DC)(DC)(DA)(DA)(DA)(DT)(DA)(DC) (DA)(DC)(DT)(DT)(DT) (DT)(DG)(DG)(DT) (DA)(DG)(DT)(DA)(DT)(DC)(DT)(DG)(DC)(DA) (DG)(DG)(DT)(DG)(DG)(DA) (DT)(DA)(DT) (DT)(DG)(DA)(DT)

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Macromolecule #7: DNA (147-MER)

MacromoleculeName: DNA (147-MER) / type: dna / ID: 7 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 45.359035 KDa
SequenceString: (DA)(DT)(DC)(DA)(DA)(DT)(DA)(DT)(DC)(DC) (DA)(DC)(DC)(DT)(DG)(DC)(DA)(DG)(DA)(DT) (DA)(DC)(DT)(DA)(DC)(DC)(DA)(DA)(DA) (DA)(DG)(DT)(DG)(DT)(DA)(DT)(DT)(DT)(DG) (DG) (DA)(DA)(DA)(DC)(DT)(DG) ...String:
(DA)(DT)(DC)(DA)(DA)(DT)(DA)(DT)(DC)(DC) (DA)(DC)(DC)(DT)(DG)(DC)(DA)(DG)(DA)(DT) (DA)(DC)(DT)(DA)(DC)(DC)(DA)(DA)(DA) (DA)(DG)(DT)(DG)(DT)(DA)(DT)(DT)(DT)(DG) (DG) (DA)(DA)(DA)(DC)(DT)(DG)(DC)(DT) (DC)(DC)(DA)(DT)(DC)(DA)(DA)(DA)(DA)(DG) (DG)(DC) (DA)(DT)(DG)(DT)(DT)(DC)(DA) (DG)(DC)(DT)(DG)(DG)(DA)(DT)(DT)(DC)(DC) (DA)(DG)(DC) (DT)(DG)(DA)(DA)(DC)(DA) (DT)(DG)(DC)(DC)(DT)(DT)(DT)(DT)(DG)(DA) (DT)(DG)(DG)(DA) (DG)(DC)(DA)(DG)(DT) (DT)(DT)(DC)(DC)(DA)(DA)(DA)(DT)(DA)(DC) (DA)(DC)(DT)(DT)(DT) (DT)(DG)(DG)(DT) (DA)(DG)(DT)(DA)(DT)(DC)(DT)(DG)(DC)(DA) (DG)(DG)(DT)(DG)(DG)(DA) (DT)(DA)(DT) (DT)(DG)(DA)(DT)

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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: 7.8
GridModel: C-flat / Material: GOLD / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.68 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 314239
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION
FSC plot (resolution estimation)

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