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A novel ubiquitin mark at the N-terminal tail of histone H2As targeted by RNF168 ubiquitin ligase

Open access
Gatti, Marco, Pinato, Sabrina, Maspero, Elena, Soffientini, Paolo, Polo, Simona, Penengo, Lorenza·2012·Cell Cycle

Abstract

Ubiquitination of histones plays a critical role in the regulation of several processes within the nucleus, including maintenance of genome stability and transcriptional regulation. The only known ubiquitination site on histones is represented by a conserved Lys residue located at the C terminus of the protein. Here, we describe a novel ubiquitin mark at the N-terminal tail of histone H2As consisting of two Lys residues at positions 13 and 15 (K13/K15). This "bidentate" site is a target of the DNA damage response (DDR) ubiquitin ligases RNF8 and RNF168. Histone mutants lacking the K13/K15 site impair RNF168- and DNA damage-dependent ubiquitination. Conversely, inactivation of the canonical C-terminal site prevents the constitutive monoubiquitination of histone H2As but does not abolish the ubiquitination induced by RNF168. A ubiquitination-defective mutant is obtained by inactivating both the N- and the C-terminal sites, suggesting that these are unique, non-redundant acceptors of ubiquitination on histone H2As. This unprecedented result implies that RNF168 generates a qualitatively different Ub mark on chromatin.

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Metadata

Authors
Gatti, M., Pinato, S., Maspero, E., Soffientini, P., Polo, S., & Penengo, L.
Venue
Cell Cycle
Published
2012-07
Volume
11
Issue
13
Pages
2538-2544
ISSN
  • 1538-4101 (ISSN-L)
  • 1551-4005
OpenAlex
W2171955018
Cited by
168
References
4
FWCI
6.27
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: A novel ubiquitin mark at the N-terminal tail of histone H2As targeted by RNF168 ubiquitin ligase. https://app.cochat.ai/papers/10.4161/cc.20919
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Gatti, M., Pinato, S., Maspero, E., Soffientini, P., Polo, S., & Penengo, L. (2012). A novel ubiquitin mark at the N-terminal tail of histone H2As targeted by RNF168 ubiquitin ligase. Cell Cycle. https://doi.org/10.4161/cc.20919

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.