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2023 Fiscal Year Final Research Report

Mechanisms for the structure formation and functions of subtelomeres

Research Project

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Project/Area Number 20H03185
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kanoh Junko  東京大学, 大学院総合文化研究科, 教授 (10323809)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords染色体 / テロメア / サブテロメア / クロマチン / ヒストン
Outline of Final Research Achievements

At the very end of the linear chromosomes of eukaryotes lies a domain called the telomere, adjacent to which exists a domain known as the "subtelomere." The aim of this research project was to elucidate the molecular mechanisms underlying the maintenance of subtelomere structure. Through various analyses, factors involved in the formation of the condensed chromatin structure, Knob, specifically formed at the subtelomeres of fission yeast, were identified. It was found that phosphorylation of histone H2A-S121, methylation of histone H3-K36, and deacetylation of histone H4 are crucial for Knob structure formation.

Free Research Field

分子生物学

Academic Significance and Societal Importance of the Research Achievements

サブテロメアには様々な遺伝子配列が含まれており、ヒトではサブテロメア遺伝子は様々な疾患と関連していることが知られている。サブテロメアで形成される凝縮クロマチン構造は、そこに存在する遺伝子の発現を抑制することから、今回の研究成果は、正常な凝縮クロマチン構造形成が遺伝子発現を正常レベルに維持するための機構を明らかにできたと言える。今後は、ヒトのサブテロメア関連の疾患の原因究明につながることが期待される。

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Published: 2025-01-30  

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