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- PDB-6sef: Class2C : CENP-A nucleosome in complex with CENP-C central region -

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Entry
Database: PDB / ID: 6sef
TitleClass2C : CENP-A nucleosome in complex with CENP-C central region
Components
  • (DNA (145-MER)) x 2
  • Centromere protein C
  • Histone H2A type 2-A
  • Histone H2B type 1-C/E/F/G/I
  • Histone H3-like centromeric protein A
  • Histone H4
KeywordsNUCLEAR PROTEIN / CENP-A / nucleosome / centromere / centromeric chromatin
Function / homology
Function and homology information


monopolar spindle attachment to meiosis I kinetochore / inner kinetochore / centromeric DNA binding / attachment of mitotic spindle microtubules to kinetochore / kinetochore assembly / condensed chromosome, centromeric region / protein localization to chromosome, centromeric region / kinetochore => GO:0000776 / establishment of mitotic spindle orientation / negative regulation of megakaryocyte differentiation ...monopolar spindle attachment to meiosis I kinetochore / inner kinetochore / centromeric DNA binding / attachment of mitotic spindle microtubules to kinetochore / kinetochore assembly / condensed chromosome, centromeric region / protein localization to chromosome, centromeric region / kinetochore => GO:0000776 / establishment of mitotic spindle orientation / negative regulation of megakaryocyte differentiation / Packaging Of Telomere Ends / depurination / positive regulation of histone exchange / CENP-A containing chromatin assembly / chromosome, centromeric region / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / negative regulation of DNA recombination at telomere / DNA replication-independent chromatin assembly / mitotic cytokinesis / pericentric heterochromatin / telomere capping / Inhibition of DNA recombination at telomere / Cleavage of the damaged pyrimidine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Meiotic synapsis / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / heterochromatin assembly => GO:0031507 / telomere organization / RNA Polymerase I Promoter Opening / SUMOylation of chromatin organization proteins / DNA replication-dependent chromatin assembly / Resolution of Sister Chromatid Cohesion / DNA methylation / HCMV Late Events / kinetochore / innate immune response in mucosa / SIRT1 negatively regulates rRNA expression / rDNA heterochromatin assembly / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / Condensation of Prophase Chromosomes / PRC2 methylates histones and DNA / negative regulation of gene expression, epigenetic / RNA Polymerase I Promoter Escape / mitotic chromosome condensation / regulation of gene silencing by miRNA / HDACs deacetylate histones / nuclear chromosome / RHO GTPases Activate Formins / Nonhomologous End-Joining (NHEJ) / Transcriptional regulation by small RNAs / NoRC negatively regulates rRNA expression / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / regulation of megakaryocyte differentiation / B-WICH complex positively regulates rRNA expression / DNA-templated transcription, initiation / Metalloprotease DUBs / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / nucleosome assembly / DNA Damage/Telomere Stress Induced Senescence / G2/M DNA damage checkpoint / RMTs methylate histone arginines / chromosome segregation / HCMV Early Events / regulation of androgen receptor signaling pathway / mitotic spindle organization / Pre-NOTCH Transcription and Translation / HDMs demethylate histones / PKMTs methylate histone lysines / Meiotic recombination / nucleosome / Activation of anterior HOX genes in hindbrain development during early embryogenesis / UCH proteinases / Transcriptional regulation of granulopoiesis / Separation of Sister Chromatids / midbody / E3 ubiquitin ligases ubiquitinate target proteins / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / double-strand break repair / double-strand break repair via nonhomologous end joining / mitotic cell cycle / Processing of DNA double-strand break ends / HATs acetylate histones / Senescence-Associated Secretory Phenotype (SASP) / chromosome, telomeric region / viral life cycle / Oxidative Stress Induced Senescence / antibacterial humoral response / Estrogen-dependent gene expression / nuclear body / antimicrobial humoral immune response mediated by antimicrobial peptide / Ub-specific processing proteases / protein ubiquitination / defense response to Gram-positive bacterium / protein heterodimerization activity
Similarity search - Function
Centromere assembly component CENP-C middle DNMT3B-binding region / CENP-C, middle DNMT3B-binding domain / Kinetochore assembly subunit CENP-C N-terminal / Kinetochore assembly subunit CENP-C, N-terminal domain / Mif2/CENP-C cupin domain / Mif2/CENP-C like / Centromere protein C/Mif2/cnp3 / Histone, subunit A / Histone, subunit A / RmlC-like cupin domain superfamily ...Centromere assembly component CENP-C middle DNMT3B-binding region / CENP-C, middle DNMT3B-binding domain / Kinetochore assembly subunit CENP-C N-terminal / Kinetochore assembly subunit CENP-C, N-terminal domain / Mif2/CENP-C cupin domain / Mif2/CENP-C like / Centromere protein C/Mif2/cnp3 / Histone, subunit A / Histone, subunit A / RmlC-like cupin domain superfamily / Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A signature. / Histone H2A conserved site / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone H2A / Histone 2A / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF) / RmlC-like jelly roll fold / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 / Histone-fold / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
DNA (> 100) / DNA (> 10) / DNA / Histone H3-like centromeric protein A / Histone H4 / Histone H2B type 1-C/E/F/G/I / Centromere protein C / Histone H2A type 2-A
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsAli-Ahmad, A. / Bilokapic, S. / Schafer, I.B. / Halic, M. / Sekulic, N.
Funding support Norway, Germany, 2items
OrganizationGrant numberCountry
Research Council of Norway263195 Norway
European Research CouncilERC-smallRNAhet-309584 Germany
CitationJournal: EMBO Rep / Year: 2019
Title: CENP-C unwraps the human CENP-A nucleosome through the H2A C-terminal tail.
Authors: Ahmad Ali-Ahmad / Silvija Bilokapić / Ingmar B Schäfer / Mario Halić / Nikolina Sekulić /
Abstract: Centromeres are defined epigenetically by nucleosomes containing the histone H3 variant CENP-A, upon which the constitutive centromere-associated network of proteins (CCAN) is built. CENP-C is ...Centromeres are defined epigenetically by nucleosomes containing the histone H3 variant CENP-A, upon which the constitutive centromere-associated network of proteins (CCAN) is built. CENP-C is considered to be a central organizer of the CCAN. We provide new molecular insights into the structure of human CENP-A nucleosomes, in isolation and in complex with the CENP-C central region (CENP-C ), the main CENP-A binding module of human CENP-C. We establish that the short αN helix of CENP-A promotes DNA flexibility at the nucleosome ends, independently of the sequence it wraps. Furthermore, we show that, in vitro, two regions of human CENP-C (CENP-C and CENP-C ) both bind exclusively to the CENP-A nucleosome. We find CENP-C to bind with high affinity due to an extended hydrophobic area made up of CENP-A and CENP-A . Importantly, we identify two key conformational changes within the CENP-A nucleosome upon CENP-C binding. First, the loose DNA wrapping of CENP-A nucleosomes is further exacerbated, through destabilization of the H2A C-terminal tail. Second, CENP-C rigidifies the N-terminal tail of H4 in the conformation favoring H4 monomethylation, essential for a functional centromere.
History
DepositionJul 29, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 14, 2019Provider: repository / Type: Initial release
Revision 1.1Sep 11, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Oct 16, 2019Group: Data collection / Database references / Category: citation / Item: _citation.journal_volume
Revision 1.3Oct 23, 2019Group: Author supporting evidence / Data collection / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.4Nov 6, 2019Group: Data collection / Refinement description / Category: software / Item: _software.name

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Structure visualization

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Assembly

Deposited unit
A: Histone H3-like centromeric protein A
B: Histone H4
C: Histone H2A type 2-A
D: Histone H2B type 1-C/E/F/G/I
E: Histone H3-like centromeric protein A
F: Histone H4
G: Histone H2A type 2-A
H: Histone H2B type 1-C/E/F/G/I
I: DNA (145-MER)
J: DNA (145-MER)
V: Centromere protein C


Theoretical massNumber of molelcules
Total (without water)214,67811
Polymers214,67811
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area54290 Å2
ΔGint-399 kcal/mol
Surface area75800 Å2
MethodPISA

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Components

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Protein , 5 types, 9 molecules AEBFCGDHV

#1: Protein Histone H3-like centromeric protein A / Centromere autoantigen A / Centromere protein A / CENP-A


Mass: 16023.630 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CENPA / Production host: Escherichia coli (E. coli) / References: UniProt: P49450
#2: Protein Histone H4 /


Mass: 11394.426 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, H4/E, ...Gene: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, H4/E, H4FE, HIST1H4K, H4/D, H4FD, HIST1H4L, H4/K, H4FK, HIST2H4A, H4/N, H4F2, H4FN, HIST2H4, HIST2H4B, H4/O, H4FO, HIST4H4
Production host: Escherichia coli (E. coli) / References: UniProt: P62805
#3: Protein Histone H2A type 2-A / Histone H2A.2 / Histone H2A/o


Mass: 14125.549 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HIST2H2AA3, H2AFO, HIST2H2AA, HIST2H2AA4 / Production host: Escherichia coli (E. coli) / References: UniProt: Q6FI13
#4: Protein Histone H2B type 1-C/E/F/G/I / Histone H2B.1 A / Histone H2B.a / H2B/a / Histone H2B.g / H2B/g / Histone H2B.h / H2B/h / Histone ...Histone H2B.1 A / Histone H2B.a / H2B/a / Histone H2B.g / H2B/g / Histone H2B.h / H2B/h / Histone H2B.k / H2B/k / Histone H2B.l / H2B/l


Mass: 13937.213 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: HIST1H2BC, H2BFL, HIST1H2BE, H2BFH, HIST1H2BF, H2BFG, HIST1H2BG, H2BFA, HIST1H2BI, H2BFK
Production host: Escherichia coli (E. coli) / References: UniProt: P62807
#7: Protein Centromere protein C / / CENP-C / Centromere autoantigen C / Centromere protein C 1 / CENP-C 1 / Interphase centromere ...CENP-C / Centromere autoantigen C / Centromere protein C 1 / CENP-C 1 / Interphase centromere complex protein 7


Mass: 14204.750 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CENPC, CENPC1, ICEN7 / Production host: Escherichia coli (E. coli) / References: UniProt: Q03188

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DNA chain , 2 types, 2 molecules IJ

#5: DNA chain DNA (145-MER)


Mass: 44520.383 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)
#6: DNA chain DNA (145-MER)


Mass: 44991.660 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1CENP-A nucleosome in complex with CENP-C central regionCOMPLEX#1-#70MULTIPLE SOURCES
2nucleosomeCOMPLEX#1-#4, #71RECOMBINANT
3DNACOMPLEX#5-#61RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
22Homo sapiens (human)9606
33synthetic construct (others)32630
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
22Escherichia coli (E. coli)562
33Escherichia coli (E. coli)562
Buffer solutionpH: 7.5
SpecimenConc.: 1.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 100 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

Software
NameVersionClassificationNB
PHENIX1.14_3260refinement
PHENIX1.14_3260refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 40000 / Symmetry type: POINT
RefinementStereochemistry target values: CDL v1.2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.006912730
ELECTRON MICROSCOPYf_angle_d0.841818433
ELECTRON MICROSCOPYf_chiral_restr0.05172086
ELECTRON MICROSCOPYf_plane_restr0.00491322
ELECTRON MICROSCOPYf_dihedral_angle_d25.92466608

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