2XQL

Fitting of the H2A-H2B histones in the electron microscopy map of the complex Nucleoplasmin:H2A-H2B histones (1:5).


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Nucleoplasmin Binds Histone H2A-H2B Dimers Through its Distal Face.

Ramos, I.Martin-Benito, J.Finn, R.Bretana, L.Aloria, K.Arizmendi, J.M.Ausio, J.Muga, A.Valpuesta, J.M.Prado, A.

(2010) J Biol Chem 285: 33771

  • DOI: 10.1074/jbc.M110.150664
  • Primary Citation of Related Structures:  
    2XQL

  • PubMed Abstract: 
  • Nucleoplasmin (NP) is a pentameric chaperone that regulates the condensation state of chromatin extracting specific basic proteins from sperm chromatin and depositing H2A-H2B histone dimers. It has been proposed that histones could bind to either the lateral or distal face of the pentameric structure ...

    Nucleoplasmin (NP) is a pentameric chaperone that regulates the condensation state of chromatin extracting specific basic proteins from sperm chromatin and depositing H2A-H2B histone dimers. It has been proposed that histones could bind to either the lateral or distal face of the pentameric structure. Here, we combine different biochemical and biophysical techniques to show that natural, hyperphosphorylated NP can bind five H2A-H2B dimers and that the amount of bound ligand depends on the overall charge (phosphorylation level) of the chaperone. Three-dimensional reconstruction of NP/H2A-H2B complex carried out by electron microscopy reveals that histones interact with the chaperone distal face. Limited proteolysis and mass spectrometry indicate that the interaction results in protection of the histone fold and most of the H2A and H2B C-terminal tails. This structural information can help to understand the function of NP as a histone chaperone.


    Organizational Affiliation

    Departamento de Bioquímica y Biología Molecular, Facultad de Ciencia y Tecnología, Universidad del País Vasco, 48080 Bilbao, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H2A-IV ACEGI91Gallus gallusMutation(s): 0 
Find proteins for P02263 (Gallus gallus)
Explore P02263 
Go to UniProtKB:  P02263
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H2B 5 BDFHJ90Gallus gallusMutation(s): 0 
Gene Names: H2B-V
Find proteins for P0C1H4 (Gallus gallus)
Explore P0C1H4 
Go to UniProtKB:  P0C1H4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-03
    Type: Initial release
  • Version 1.1: 2013-03-20
    Changes: Derived calculations, Other, Version format compliance
  • Version 1.2: 2017-08-30
    Changes: Data collection