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2021 Fiscal Year Final Research Report

Post-translational modifications regulating the activity and function of carbon monoxide synthase

Research Project

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Project/Area Number 19K06574
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionKurume University

Principal Investigator

Higashimoto Yuichiro  久留米大学, 医学部, 教授 (40352124)

Co-Investigator(Kenkyū-buntansha) 坂口 達也  久留米大学, 医学部, 助教 (00757031)
松井 孝憲  久留米大学, 医学部, 准教授 (10425233)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords翻訳後修飾 / 一酸化炭素 / 核移行シグナル
Outline of Final Research Achievements

Heme oxygenase-1 (HO-1) is a heme-degrading enzyme anchored in the endoplasmic reticulum. HO-1 is highly expressed in various cancers and its nuclear localization is associated with the progression of some cancers. Nevertheless, the mechanism underlying HO-1 nuclear translocation and its pathological significance remain unclear. Here, we investigated the potential regulation of nuclear heme oxygenase-1 (HO-1) by post-translational modifications. 1) Heme and hypoxia treatment of A549, H1299, NIH313 and HCT116 resulted in HO-1 translocation to nuclei. 2) Nuclear HO-1 revealed two acetylation sites located at Lys243 and Lys256. 3) The acetylation is crucial for nuclear HO-1-enhanced tumor progression in vitro. 4) Nuclear HO-1 interacts with CREB-binding protein and nuclear factor erythroid2-related factor 2.

Free Research Field

生化学

Academic Significance and Societal Importance of the Research Achievements

一酸化炭素は生体毒として知られているが、生体内においても常時生じている。そのCO産出酵素の活性は厳密にコントロールされていると考えられているが、その詳細な制御機構は不明である。今回の研究結果において、CO産出酵素が各種癌細胞において核内に強発現していることを明らかにした。またその核内に局在するCO産出酵素は様々な翻訳後修飾を受けており、その翻訳後修飾の制御破綻が、がん増殖能と深く関係していることを明らかにした。

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Published: 2023-01-30  

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