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  4. The intrinsically disordered distal face of nucleoplasmin recognizes distinct oligomerization states of histones
 
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The intrinsically disordered distal face of nucleoplasmin recognizes distinct oligomerization states of histones
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Author(s)
Ramos, I
Fernández-Rivero, N
Arranz, R
Aloria, K
Finn, R
more
Type
Journal Article
Abstract
The role of Nucleoplasmin (NP) as a H2A-H2B histone chaperone has been extensively characterized. To understand its putative interaction with other histone ligands, we have characterized its ability to bind H3-H4 and histone octamers. We find that the chaperone forms distinct complexes with histones, which differ in the number of molecules that build the assembly and in their spatial distribution. When complexed with H3-H4 tetramers or histone octamers, two NP pentamers form an ellipsoidal particle with the histones located at the center of the assembly, in stark contrast with the NP/H2A-H2B complex that contains up to five histone dimers bound to one chaperone pentamer. This particular assembly relies on the ability of H3-H4 to form tetramers either in solution or as part of the octamer, and it is not observed when a variant of H3 (H3C110E), unable to form stable tetramers, is used instead of the wild-type protein. Our data also suggest that the distal face of the chaperone is involved in the interaction with distinct types of histones, as supported by electron microscopy analysis of the different NP/histone complexes. The use of the same structural region to accommodate all type of histones could favor histone exchange and nucleosome dynamics.
Date Issued
2013-10-10
Date Acceptance
2013-09-15
Citation
Nucleic Acids Research, 2013, 42 (2), pp.1311-1325
URI
http://hdl.handle.net/10044/1/40073
DOI
https://www.dx.doi.org/10.1093/nar/gkt899
ISSN
1362-4962
Publisher
Oxford University Press
Start Page
1311
End Page
1325
Journal / Book Title
Nucleic Acids Research
Volume
42
Issue
2
Copyright Statement
© The Author(s) 2013. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
License URL
http://creativecommons.org/licenses/by/4.0/
Subjects
Amino Acid Sequence
Animals
Histones
Intrinsically Disordered Proteins
Molecular Sequence Data
Nucleoplasmins
Protein Multimerization
Proteolysis
Xenopus laevis
Developmental Biology
05 Environmental Sciences
06 Biological Sciences
08 Information And Computing Sciences
Publication Status
Published
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