7TAN

Structure of VRK1 C-terminal tail bound to nucleosome core particle


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Multivalent DNA and nucleosome acidic patch interactions specify VRK1 mitotic localization and activity.

Budziszewski, G.R.Zhao, Y.Spangler, C.J.Kedziora, K.M.Williams, M.R.Azzam, D.N.Skrajna, A.Koyama, Y.Cesmat, A.P.Simmons, H.C.Arteaga, E.C.Strauss, J.D.Kireev, D.McGinty, R.K.

(2022) Nucleic Acids Res 50: 4355-4371

  • DOI: https://doi.org/10.1093/nar/gkac198
  • Primary Citation of Related Structures:  
    7TAN

  • PubMed Abstract: 

    A key role of chromatin kinases is to phosphorylate histone tails during mitosis to spatiotemporally regulate cell division. Vaccinia-related kinase 1 (VRK1) is a serine-threonine kinase that phosphorylates histone H3 threonine 3 (H3T3) along with other chromatin-based targets. While structural studies have defined how several classes of histone-modifying enzymes bind to and function on nucleosomes, the mechanism of chromatin engagement by kinases is largely unclear. Here, we paired cryo-electron microscopy with biochemical and cellular assays to demonstrate that VRK1 interacts with both linker DNA and the nucleosome acidic patch to phosphorylate H3T3. Acidic patch binding by VRK1 is mediated by an arginine-rich flexible C-terminal tail. Homozygous missense and nonsense mutations of this acidic patch recognition motif in VRK1 are causative in rare adult-onset distal spinal muscular atrophy. We show that these VRK1 mutations interfere with nucleosome acidic patch binding, leading to mislocalization of VRK1 during mitosis, thus providing a potential new molecular mechanism for pathogenesis.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.2
A, E
135Homo sapiensMutation(s): 0 
Gene Names: H3C15HIST2H3AH3C14H3F2H3FMHIST2H3CH3C13HIST2H3D
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Find proteins for Q71DI3 (Homo sapiens)
Go to UniProtKB:  Q71DI3
PHAROS:  Q71DI3
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, F
103Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P62805 (Homo sapiens)
Go to UniProtKB:  P62805
PHAROS:  P62805
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A type 1
C, G
129Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P0C0S8 (Homo sapiens)
Go to UniProtKB:  P0C0S8
PHAROS:  P0C0S8
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B type 1-C/E/F/G/I
D, H
125Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P62807 (Homo sapiens)
Explore P62807 
Go to UniProtKB:  P62807
PHAROS:  P62807
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62807
Sequence Annotations
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  • Reference Sequence
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein kinase VRK1
K, L
398Homo sapiensMutation(s): 0 
Gene Names: VRK1
EC: 2.7.11.1
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Find proteins for Q99986 (Homo sapiens)
Go to UniProtKB:  Q99986
PHAROS:  Q99986
GTEx:  ENSG00000100749 
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.19
RECONSTRUCTIONRELION3.1

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM133498
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesT32GM119999
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesF99CA253730

Revision History  (Full details and data files)

  • Version 1.0: 2022-05-04
    Type: Initial release
  • Version 1.1: 2022-05-18
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Refinement description