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- PDB-9b2s: Haspin bound to nucleosome in position 1 -

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Basic information

Entry
Database: PDB / ID: 9b2s
TitleHaspin bound to nucleosome in position 1
Components
  • (601 DNA (185- ...) x 2
  • Histone H2A
  • Histone H2B 1.1
  • Histone H3.2
  • Histone H4
  • Serine/threonine-protein kinase haspin
KeywordsDNA BINDING PROTEIN/Transferase/DNA / haspin / nucleosome / histone / chromatin / H3T3ph / DNA BINDING PROTEIN / DNA BINDING PROTEIN-Transferase-DNA complex
Function / homology
Function and homology information


histone H3T3 kinase activity / protein localization to chromosome, centromeric region / mitotic sister chromatid cohesion / mitotic spindle assembly checkpoint signaling / spindle / structural constituent of chromatin / nucleosome / heterochromatin formation / mitotic cell cycle / nucleosome assembly ...histone H3T3 kinase activity / protein localization to chromosome, centromeric region / mitotic sister chromatid cohesion / mitotic spindle assembly checkpoint signaling / spindle / structural constituent of chromatin / nucleosome / heterochromatin formation / mitotic cell cycle / nucleosome assembly / chromosome / protein phosphorylation / non-specific serine/threonine protein kinase / protein kinase activity / intracellular signal transduction / protein heterodimerization activity / protein serine kinase activity / centrosome / DNA binding / nucleoplasm / ATP binding / nucleus / cytoplasm
Similarity search - Function
Serine/threonine-protein kinase haspin, C-terminal / Haspin like kinase domain / Domain of unknown function / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain ...Serine/threonine-protein kinase haspin, C-terminal / Haspin like kinase domain / Domain of unknown function / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 / Histone-fold / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA (> 100) / Histone H2B 1.1 / Histone H4 / Histone H3.2 / Histone H2A / Serine/threonine-protein kinase haspin
Similarity search - Component
Biological speciesXenopus laevis (African clawed frog)
Homo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.01 Å
AuthorsHicks, C.W. / Wolberger, C.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)5R35GM130393 United States
CitationJournal: Nat Struct Mol Biol / Year: 2025
Title: Haspin kinase binds to a nucleosomal DNA supergroove.
Authors: Chad W Hicks / Colin R Gliech / Sanim Rahman / Xiangbin Zhang / Andrew S Eneim / Stacy J Vasquez / Andrew J Holland / Cynthia Wolberger /
Abstract: Phosphorylation of histone H3 threonine 3 (H3T3) by Haspin recruits the chromosomal passenger complex to the inner centromere and ensures proper cell cycle progression through mitosis. The mechanism ...Phosphorylation of histone H3 threonine 3 (H3T3) by Haspin recruits the chromosomal passenger complex to the inner centromere and ensures proper cell cycle progression through mitosis. The mechanism by which Haspin binds to nucleosomes to phosphorylate H3T3 is not known. Here we report cryogenic electron microscopy structures of the human Haspin kinase domain bound to a nucleosome. In contrast with previous structures of histone-modifying enzymes, Haspin solely contacts the nucleosomal DNA, inserting into a supergroove formed by apposing major grooves of two DNA gyres. This binding mode provides a plausible mechanism by which Haspin can bind to nucleosomes in a condensed chromatin environment to phosphorylate H3T3. We identify key basic residues in the Haspin kinase domain that are essential for phosphorylation of nucleosomal histone H3 and binding to mitotic chromatin. Our structural data provide notable insight into a histone-modifying enzyme that binds to nucleosomes solely through DNA contacts.
History
DepositionMar 16, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 22, 2025Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: Additional map / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 22, 2025Data content type: Mask / Data content type: Mask / Provider: repository / Type: Initial release
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Revision 1.1May 28, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
Revision 1.1May 28, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name
Revision 1.2Aug 6, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Histone H3.2
B: Histone H4
C: Histone H2A
D: Histone H2B 1.1
E: Histone H3.2
F: Histone H4
G: Histone H2A
H: Histone H2B 1.1
K: Serine/threonine-protein kinase haspin
I: 601 DNA (185-MER)
J: 601 DNA (185-MER)


Theoretical massNumber of molelcules
Total (without water)264,13811
Polymers264,13811
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 5 types, 9 molecules AEBFCGDHK

#1: Protein Histone H3.2 / Histone H3


Mass: 15435.126 Da / Num. of mol.: 2 / Mutation: G102A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P84233
#2: Protein Histone H4


Mass: 11394.426 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P62799
#3: Protein Histone H2A


Mass: 14109.436 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Gene: hist1h2aj, LOC494591, XELAEV_18003602mg / Production host: Escherichia coli (E. coli) / References: UniProt: Q6AZJ8
#4: Protein Histone H2B 1.1 / H2B1.1


Mass: 13655.948 Da / Num. of mol.: 2 / Mutation: S33T
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Xenopus laevis (African clawed frog) / Production host: Escherichia coli (E. coli) / References: UniProt: P02281
#5: Protein Serine/threonine-protein kinase haspin / Germ cell-specific gene 2 protein / H-haspin / Haploid germ cell-specific nuclear protein kinase


Mass: 40711.484 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HASPIN, GSG2 / Production host: Escherichia coli (E. coli)
References: UniProt: Q8TF76, non-specific serine/threonine protein kinase

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601 DNA (185- ... , 2 types, 2 molecules IJ

#6: DNA chain 601 DNA (185-MER)


Mass: 56796.160 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)
#7: DNA chain 601 DNA (185-MER)


Mass: 57440.531 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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Details

Has protein modificationN

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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

ComponentName: Haspin bound to nucleosome / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Xenopus laevis (African clawed frog)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding 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 FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 40 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.01 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 152199 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00516162
ELECTRON MICROSCOPYf_angle_d0.58623171
ELECTRON MICROSCOPYf_dihedral_angle_d29.6414375
ELECTRON MICROSCOPYf_chiral_restr0.0372628
ELECTRON MICROSCOPYf_plane_restr0.0041846

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