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Plant Histone HTB (H2B) Variants in Regulating Chromatin Structure and Function

French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben Gurion 84990, Israel
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Plants 2020, 9(11), 1435; https://doi.org/10.3390/plants9111435
Received: 7 September 2020 / Revised: 9 October 2020 / Accepted: 23 October 2020 / Published: 25 October 2020
(This article belongs to the Special Issue Chromatin Dynamics for Developmental Transitions in Plants)
Besides chemical modification of histone proteins, chromatin dynamics can be modulated by histone variants. Most organisms possess multiple genes encoding for core histone proteins, which are highly similar in amino acid sequence. The Arabidopsis thaliana genome contains 11 genes encoding for histone H2B (HTBs), 13 for H2A (HTAs), 15 for H3 (HTRs), and 8 genes encoding for histone H4 (HFOs). The finding that histone variants may be expressed in specific tissues and/or during specific developmental stages, often displaying specific nuclear localization and involvement in specific nuclear processes suggests that histone variants have evolved to carry out specific functions in regulating chromatin structure and function and might be important for better understanding of growth and development and particularly the response to stress. In this review, we will elaborate on a group of core histone proteins in Arabidopsis, namely histone H2B, summarize existing data, and illuminate the potential function of H2B variants in regulating chromatin structure and function in Arabidopsis thaliana. View Full-Text
Keywords: Arabidopsis; chromatin organization; flowering; histone H2B (HTB) variants; histone fold; histone modification; nuclear localization; nucleolar retention; nucleosome Arabidopsis; chromatin organization; flowering; histone H2B (HTB) variants; histone fold; histone modification; nuclear localization; nucleolar retention; nucleosome
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Khadka, J.; Pesok, A.; Grafi, G. Plant Histone HTB (H2B) Variants in Regulating Chromatin Structure and Function. Plants 2020, 9, 1435.

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