Peroxisome homeostasis and its regulation via phoshorylation
Project/Area Number |
17K07310
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Structural biochemistry
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Research Institution | Kyushu University |
Principal Investigator |
Okumoto Kanji 九州大学, 理学研究院, 助教 (20363319)
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Project Period (FY) |
2017-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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Keywords | ペルオキシソーム / リン酸化 / タンパク質輸送 / カタラーゼ / 酸化ストレス応答 / 過酸化水素 / 細胞内小器官 / 酸化ストレス / 細胞小器官 / 翻訳後修飾 |
Outline of Final Research Achievements |
Catalase, a hydrogen peroxide (H2O2)-decomposing enzyme, is mainly localized in peroxisomes. Here, we found that mammalian peroxin Pex14p, a central component of peroxisomal protein import machinery, is phosphorylated in vivo upon oxidative stresses such as H2O2. H2O2-induced phosphorylation of Pex14p suppresses peroxisomal import of catalase, leading to the increase of cytosolic catalase to counteract oxidative stress for cell survival. This is the first demonstration of phosphorylation-dependent, spatiotemporal regulation of peroxisomal matrix protein import.
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Academic Significance and Societal Importance of the Research Achievements |
ペルオキシソームへのタンパク質輸送がリン酸化修飾により制御されるという知見はこれまで酵母から哺乳類を通じて世界初のものであり、細胞内タンパク質選別輸送の新たな制御機構として学術的意義が高い。また、カタラーゼの細胞内局在の制御、すなわちサイトゾル局在性カタラーゼ量の調節が抗酸化ストレス応答として作用することが明らかとなり、この分子機構の理解が炎症反応や老化の進行などを介して病気や健康に影響を及ぼす酸化ストレスの軽減へ向けた創薬・医療シーズとなる可能性が示された。
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Report
(4 results)
Research Products
(35 results)
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[Journal Article] Systematic identification of regulators of oxidative stress reveals non-canonical roles for peroxisomal import and the pentose phosphate pathway.2020
Author(s)
Dubreuil, M.M., Morgens, D.W., Okumoto, K., Honsho, M., Contrepois, K., Lee-McMullen, B., Traber, G.M., Sood, R.S., Dixon, S.J., Snyder, M.P., *Fujiki, Y., and *Bassik, M.C.
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Journal Title
Cell Rep.
Volume: 30
Issue: 5
Pages: 1417-1433
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Dynamics of the nucleoside diphosphate kinase protein DYNAMO2 correlates with the changes in the global GTP level during the cell cycle of <i>Cyanidioschyzon merolae</i>2019
Author(s)
Imoto, Y., Abe, Y., Okumoto, K., Ohnuma, M., Kuroiwa, H., Kuroiwa, T., and Fujiki, Y.
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Journal Title
Proceedings of the Japan Academy, Series B
Volume: 95
Issue: 2
Pages: 75-85
DOI
NAID
ISSN
0386-2208, 1349-2896
Year and Date
2019-02-08
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] A newly identified mutation in the PEX26 gene is associated with a milder form of Zellweger spectrum disorder.2019
Author(s)
Tanaka, A. J., Okumoto, K., Tamura, S., Abe, Y., Hirsch, Y., Deng, L., Ekstein, J., Chung, W. K., and Fujiki Y.
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Journal Title
Cold Spring Harb. Mol. Case Stud.
Volume: 5
Issue: 1
Pages: 1-16
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] A newly isolated Pex7-binding, atypical PTS2 protein P7BP2 is a novel dynein-type AAA+ protein.2018
Author(s)
Niwa, H., Miyauchi-Nanri, Y., Okumoto, K., Mukai, S., Noi, K., Ogura, T., and Fujiki Y.
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Journal Title
J. Biochem.
Volume: 164
Pages: 437-447
DOI
NAID
Related Report
Peer Reviewed / Open Access
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[Journal Article] New splicing variants of mitochondrial Rho GTPase-1 (Miro1) transport peroxisomes.2018
Author(s)
Okumoto, K., Ono, T., Toyama, R., Shimomura, A., Nagata, A., and Fujiki Y.
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Journal Title
J. Cell Biol.
Volume: 217
Issue: 2
Pages: 619-633
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Blue-Native PAGE: Applications to study on peroxisome biogenesis2017
Author(s)
Okumoto , K., Tamura, S., and Fujiki, Y.
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Journal Title
In: Schrader, M. (ed.) Peroxisomes: Methods and Protocols, Methods in Molecular Biology (Series Ed.: Walker, J.M.), Springer, Humana Press, New York, USA
Volume: 1595
Pages: 197-205
DOI
ISBN
9781493969357, 9781493969371
Related Report
Peer Reviewed
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[Journal Article] Peroxisomal membrane and matrix protein import using a semi-intact mammalian cell system2017
Author(s)
Okumoto, K., Honsho, M., Liu, Y., and Fujiki, Y.
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Journal Title
In: Schrader, M. (ed.) Peroxisomes: Methods and Protocols, Methods in Molecular Biology (Series Ed.: Walker, J.M.), Springer, Humana Press, New York, USA
Volume: 1595
Pages: 213-219
DOI
ISBN
9781493969357, 9781493969371
Related Report
Peer Reviewed
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[Presentation] VDAC2-BAK axis regulates peroxisomal membrane permeability and catalase release.2017
Author(s)
Fujiki, Y., Miyata, N., Mukai, S., Hosoi, K., Okumoto, K., and Cheng E.H.
Organizer
Gordon Research Conference on Organellar Channels & Transporters
Related Report
Int'l Joint Research
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