• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on the functions of WRN and WRNIP1 that interacts with WRN

Research Project

Project/Area Number 20390020
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Biological pharmacy
Research InstitutionTohoku University

Principal Investigator

ENOMOTO Takemi  Tohoku University, 薬学研究所, 教授 (80107383)

Co-Investigator(Kenkyū-buntansha) TADA Shusuke  帝京平成大学, 薬学部, 教授 (00216970)
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2010: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2009: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2008: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywordsウェルナー症候群 / 早期老化 / WRN / WRNIP1 / RAD18 / DNA損傷回避 / 複製フォーク / ユビキチン化 / WPN / RAK18 / WRNTP1
Research Abstract

In this project, we tried to identify the DNA damage avoidance pathway in which WRNIP1 is involved and to clarify how to affect RAD18 and WRN this pathway, and obtained the following results.
(1) WRNIP1 localized to the region containing DNA single-strand breaks via its N-terminal UBZ domain.
(2) RAD18-RAD6 complex bound to replication fork like DNA recruited WRNIP1 to the DNA, and recruited WRNIP1 replaced RAD18-RAD6 complex.
(3) WRNIP1 bound to template-primer DNA recruited WRN to the DNA, and recruited WRN replaced WRNIP1.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (63 results)

All 2011 2010 2009 2008

All Journal Article (37 results) (of which Peer Reviewed: 21 results) Presentation (24 results) Book (2 results)

  • [Journal Article] Biphasic chromatin binding of FACT during DNA replication.2011

    • Author(s)
      Kundu L.R., Seki M., Watanabe N., Murofusi H, Furukohri A., Waga S., Score A.J., Blow J.J., Horikoshi M., Enomoto T., Tada S.
    • Journal Title

      Biochim.Biophys.Acta 1813

      Pages: 1129-1136

    • Related Report
      2010 Final Research Report
  • [Journal Article] The N-terminal region of RECQL4 lacking the helicase domain is both essential and sufficient for the viability of vertebrate cells.2011

    • Author(s)
      Abe T., Yoshimura A., Hosono Y., Tada S., Seki M., Enomoto T.
    • Journal Title

      Biochim.Biophys.Acta 1813

      Pages: 473-479

    • Related Report
      2010 Final Research Report
  • [Journal Article] The N-terminal region of RECQL4 lacking the helicase domain is both essential and sufficient for the viability of vertebrate cells.2011

    • Author(s)
      Abe, T.
    • Journal Title

      Biochim.Biophys.Acta

      Volume: VOL.1813 Pages: 473-479

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Biphasic chromatin binding of FACT during DNA replication.2011

    • Author(s)
      Kundu, L.R.
    • Journal Title

      Biochim.Biophys.Acta

      Volume: VOL.1813 Pages: 1129-1136

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SOD1 is essential for the viability of DT40 cells and nuclear SOD1 functions as a guardian of genomic DNA.2010

    • Author(s)
      Inoue E., Tano K., Yoshii H., Nakamura J., Tada S., Watanabe M., Seki M., Enomoto T.
    • Journal Title

      J.Nuc.Acids (in press)

    • Related Report
      2010 Final Research Report
  • [Journal Article] Deregulated Cdc6 inhibits DNA replication and suppresses Cdc7-mediated phosphorylation of Mcm2-7 complex.2010

    • Author(s)
      Kundu L.R., Kumata Y., Kakusho N., Watanabe S., Furukohri A., Waga S., Seki M., Masai H., Enomoto T., Tada S.
    • Journal Title

      Nucleic Acids Res. 38

      Pages: 5409-5418

    • Related Report
      2010 Final Research Report
  • [Journal Article] RecQL5 promotes genome stabilization through two parallel mechanisms-interacting with RNA polymerase II and acting as a helicase.2010

    • Author(s)
      Islam M.N., Fox D.III, Guo R., Enomoto T., Wang W.
    • Journal Title

      Mol.Cell.Biol. 30

      Pages: 2460-2472

    • Related Report
      2010 Final Research Report
  • [Journal Article] RecQL5 promotes genome stabilization through two parallel mechanisms-interacting with RNA polymerase II and acting as a helicase.2010

    • Author(s)
      Islam, M.N.
    • Journal Title

      Mol.Cell.Biol.

      Volume: VOL.30 Pages: 2460-2472

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deregulated Cdc6 inhibits DNA replication and suppresses Cdc7-mediated phosphorylation of Mcm2-7 complex.2010

    • Author(s)
      Kundu, L.R.
    • Journal Title

      Nucleic Acids Res.

      Volume: VOL.38 Pages: 5409-5418

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SOD1 is essential for the viability of DT40 cells and nuclear SOD1 functions as a guardian of genomic DNA.2010

    • Author(s)
      Inoue, E
    • Journal Title

      J.Nuc.Acids

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chromatin dynamics mediated by histone modifiers and histone chaperones in postreplicative recombination.2010

    • Author(s)
      Endo, H.
    • Journal Title

      Genes Cells

      Volume: VOL.15 Pages: 945-958

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of heliquinomycin on the activity of human MCM4/6/7 helicase.2009

    • Author(s)
      Ishimi Y., Sugiyama T., Nakaya R., Kanamori M., Kohno T., Enomoto T., Chino M.
    • Journal Title

      FEBS J. 276

      Pages: 3382-3391

    • Related Report
      2010 Final Research Report
  • [Journal Article] Physical and functional interaction between WRNIP1 and RAD18.2009

    • Author(s)
      Yoshimura A., Seki M., Kanamori M., Tateishi S., Tsurimoto T., Tada S., Enomoto T.
    • Journal Title

      Genes Genet.System 84

      Pages: 171-178

    • NAID

      10024791852

    • Related Report
      2010 Final Research Report
  • [Journal Article] Accumulation of sumoylated Rad52 in checkpoint mutants perturbed in DNA replication.2009

    • Author(s)
      Ohuchi T., Seki M., Kugou K., Tada S., Ohta K., Enomoto T.
    • Journal Title

      DNA Repair 8

      Pages: 690-696

    • Related Report
      2010 Final Research Report
  • [Journal Article] Generation and characterization of cells that can be conditionally depleted of mitochondrial SOD2.2009

    • Author(s)
      Takada S., Inoue E., Tano K., Yoshii H., Abe T., Yoshimura A., Akita M., Tada S., Watanabe M., Seki M., Enomoto T.
    • Journal Title

      Biochem.Biophys.Res.Commun. 379

      Pages: 233-238

    • Related Report
      2010 Final Research Report
  • [Journal Article] Repression of nascent strand elongation by deregulated Cdt1 during DNA replication in Xenopus egg extracts.2009

    • Author(s)
      Tsuyama T., Watanabe S., Aoki A., Cho Y., Seki M., Enomoto T., Tada S.
    • Journal Title

      Mol.Bio.Cell 20

      Pages: 937-947

    • Related Report
      2010 Final Research Report
  • [Journal Article] Global analysis of mutual interaction surfaces of nucleosomes with comprehensive point mutants2009

    • Author(s)
      Sakamoto, M.
    • Journal Title

      Genes Cells 14

      Pages: 1271-1330

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structure of the Cdt1 C-terminal domain : conservation of the winged helix fold in replication licensing factors2009

    • Author(s)
      Khayrutdinov, B.
    • Journal Title

      Protein Sci. 18

      Pages: 2252-2264

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of heliquinomycin on the activity of human MCM4/6/7 helicase2009

    • Author(s)
      Ishimi, Y.
    • Journal Title

      FEBS Journal 276

      Pages: 3382-3391

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Physical and functional interaction between WRNIP1 and RAD182009

    • Author(s)
      Yoshimura, A.
    • Journal Title

      Genes Genet.System 84

      Pages: 171-178

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accumulation of sumoylated Rad52 in checkpoint mutants perturbed in DNA replication2009

    • Author(s)
      Ohuchi, T.
    • Journal Title

      DNA Repair 8

      Pages: 690-696

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generation and characterization of cells that can be conditionally depleted of mitochondrial SOD22009

    • Author(s)
      Takada, S.
    • Journal Title

      Biochem.Biophys.Res.Commun. 379

      Pages: 233-238

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Repression of nascent strand elongation by deregulated Cdt1 during DNA replication in Xenopus egg extracts2009

    • Author(s)
      Tsuyama, T.
    • Journal Title

      Mol.Biol.Cell 20

      Pages: 937-947

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Repression of nascent strand elongation by deregulated Cdtl during DNA replication in2009

    • Author(s)
      Tsuyama,T.
    • Journal Title

      Xenoous eaa extracts 20

      Pages: 937-947

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generation and characterization of cells that can be conditionally depleted of mitochondrial SOD22009

    • Author(s)
      Takada, S
    • Journal Title

      Biochem. Biophys. Res. Commun. 379

      Pages: 233-238

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accumulation of sumoylated Rad52 in checkpoint mutants perturbed in DNA replication2009

    • Author(s)
      Ohuchi, T.
    • Journal Title

      DNA Repair (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] RMI, a new OB-fold complex essential for Bloom syndrome protein to maintain genome stability.2008

    • Author(s)
      Xu D., Guo R., Sobeck A., Bachrati C.Z., Yang J., Enomoto T., Brown G.W., Hoatlin M.E., Hickson I.D., Wang W.
    • Journal Title

      Gene Dev. 22

      Pages: 2843-2855

    • Related Report
      2010 Final Research Report
  • [Journal Article] KU70/80, DNA-PKcs, and Artemis are essential for the rapid induction of apoptosis after massive DSB formation.2008

    • Author(s)
      Abe T., Ishiai M., Hosono Y., Yoshimura A., Tsuji H., Tada S., Adachi N., Koyama H., Takata M., Takeda S., Enomoto T., Seki M.
    • Journal Title

      Cell Signal. 20

      Pages: 1978-1985

    • Related Report
      2010 Final Research Report
  • [Journal Article] Nuclear localization of Rad52 is pre-requisite for its sumoylation.2008

    • Author(s)
      Ohuchi T., Seki M., Enomoto T.
    • Journal Title

      Biochem.Biophys.Res.Commun. 372

      Pages: 126-130

    • Related Report
      2010 Final Research Report
  • [Journal Article] Rad52 sumoylation and its involvement in the efficient induction of homologous recombination.2008

    • Author(s)
      Ohuchi T., Seki M., Branzei D., Maeda D., Ui A., Ogiwara H., Tada S., Enomoto T.
    • Journal Title

      DNA Repair 7

      Pages: 879-889

    • Related Report
      2010 Final Research Report
  • [Journal Article] Vertebrate WRNIP1 and BLM are required for efficient maintenance of genome stability.2008

    • Author(s)
      Hayashi T., Seki M., Yoshimura A., Inoue E., Kusa Y., Tada S., Enomoto T.
    • Journal Title

      Genes Genet.Syst. 83

      Pages: 95-100

    • NAID

      10024395708

    • Related Report
      2010 Final Research Report
  • [Journal Article] Analyses of functional interaction between RECQL1, RECQL5, and BLM which physically interact with DNA topoisomerase IIIa.2008

    • Author(s)
      Otsuki M., Seki M., Inoue E., Abe T., Narita Y., Yoshimura A., Tada S., Ishii Y., Enomoto T.
    • Journal Title

      Biochim.Biophys.Acta 1782

      Pages: 75-81

    • Related Report
      2010 Final Research Report
  • [Journal Article] Vertebrate WRNIP1 and BLM are required for efficient maintenance of genome stability2008

    • Author(s)
      Hayashi, T.
    • Journal Title

      Genes Genet. Syst. 83

      Pages: 95-100

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rad52 sumoylation and its involvement in the efficient induction of homologous recombination2008

    • Author(s)
      Ohuchi, T.
    • Journal Title

      DNA Repair 7

      Pages: 879-889

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nuclear localization of Rad52 is pre-requisite for its sumoylation2008

    • Author(s)
      Ohuchi, T.
    • Journal Title

      Biochem. Biophys. Res. Commun. 372

      Pages: 126-130

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] DNA-PKcs, and Artemis are essential for the rapid induction of apoptosis after massive DSB formation2008

    • Author(s)
      Abe, T.
    • Journal Title

      Cell Signal. 20

      Pages: 1978-1985

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phenyl hydroquinone, an Ames test-negative carcinogen, induces Hogl-dependent stress response signaling : Implication for aneuploidy development in Saccharomyces cerevisiae2008

    • Author(s)
      Yamamoto, A.
    • Journal Title

      FEBS J. 275

      Pages: 5733-5744

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] The nucleosome entry site regulates H3-K36me3 through the association of RNA polymerase II and Set2 on chromatin.2010

    • Author(s)
      遠藤博人
    • Organizer
      第33回日本分子生物学会年会・第83回日本生化学会大会合同大会
    • Place of Presentation
      神戸ポートアイランド(兵庫県)
    • Year and Date
      2010-12-09
    • Related Report
      2010 Annual Research Report
  • [Presentation] The N-terminal region of RECQL4 Lacking the helicase domain is both essential and sufficient for the viavility of vertebrate.2010

    • Author(s)
      吉村明
    • Organizer
      第33回日本分子生物学会年会・第83回日本生化学会大会合同大会
    • Place of Presentation
      神戸ポートアイランド(兵庫県)
    • Year and Date
      2010-12-08
    • Related Report
      2010 Annual Research Report
  • [Presentation] SOD1枯渇細胞とPRDX1枯渇細胞の抗酸化剤に対する挙動の違い2010

    • Author(s)
      樋口優人
    • Organizer
      第33回日本分子生物学会年会・第83回日本生化学会大会合同大会
    • Place of Presentation
      神戸ポートアイランド(兵庫県)
    • Year and Date
      2010-12-08
    • Related Report
      2010 Annual Research Report
  • [Presentation] Biphasic chromatin binding of histone chaperone FACT during eukaryotic chromatin DNA replication.2010

    • Author(s)
      レナ・ラニ・クンドウ
    • Organizer
      第33回日本分子生物学会年会・第83回日本生化学会大会 合同大会
    • Place of Presentation
      神戸ポートアイランド(兵庫県)
    • Year and Date
      2010-12-07
    • Related Report
      2010 Annual Research Report
  • [Presentation] Analysis of novel histone chaperone Cdc45 interacting with histones H3-H4.2010

    • Author(s)
      大隅達也
    • Organizer
      第33回日本分子生物学会年会・第83回日本生化学会大会
    • Place of Presentation
      神戸ポートアイランド(兵庫県)
    • Year and Date
      2010-12-07
    • Related Report
      2010 Annual Research Report
  • [Presentation] DNAヘリカーゼRECQL5のDNA組換え・修復における機能の解析2010

    • Author(s)
      細野嘉史
    • Organizer
      第33回日本分子生物学会年会・第83回日本生化学会大会合同大会
    • Place of Presentation
      神戸ポートアイランド(兵庫県)
    • Year and Date
      2010-12-07
    • Related Report
      2010 Annual Research Report
  • [Presentation] Acetylation of histone H3-K56 regulates homologous recombination2009

    • Author(s)
      遠藤博人、榎本武美
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      パシフィコ横浜(横浜)
    • Year and Date
      2009-12-11
    • Related Report
      2009 Annual Research Report
  • [Presentation] A mutant protein of histone chaperone CIA/Asf1 defective in disrupting histone(H3-H4)_2 tetramer accelerates rate of DNA replication2009

    • Author(s)
      大隅達也、榎本武美
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      パシフィコ横浜(横浜)
    • Year and Date
      2009-12-11
    • Related Report
      2009 Annual Research Report
  • [Presentation] Analysis of DNA replication repression by excess Cdt12009

    • Author(s)
      牛田磨理、榎本武美
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      パシフィコ横浜(横浜)
    • Year and Date
      2009-12-10
    • Related Report
      2009 Annual Research Report
  • [Presentation] Nuclear superoxide may trigger spontaneous sister chromatid exchanges(招待講演)2009

    • Author(s)
      井上絵里、榎本武美
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      パシフィコ横浜(横浜)
    • Year and Date
      2009-12-09
    • Related Report
      2009 Annual Research Report
  • [Presentation] 親鎖ヌクレオソーム中のヒストン成分の娘鎖への分配機構解明に向けて(招待講演)2009

    • Author(s)
      石川勝幸、榎本武美
    • Organizer
      第82回日本生化学会大会
    • Place of Presentation
      ポートアイランド(神戸)
    • Year and Date
      2009-10-23
    • Related Report
      2009 Annual Research Report
  • [Presentation] DNA複製チェックポイント因子ClaspinとRad17の機能的関連の解析2009

    • Author(s)
      細野嘉史、榎本武美
    • Organizer
      第82回日本生化学会大会
    • Place of Presentation
      ポートアイランド(神戸)
    • Year and Date
      2009-10-23
    • Related Report
      2009 Annual Research Report
  • [Presentation] DNA複製に必須なCdc45の新規機能の解析2009

    • Author(s)
      大隅達也、榎本武美
    • Organizer
      第48回日本薬学会東北支部大会
    • Place of Presentation
      東北薬科大学(仙台)
    • Year and Date
      2009-10-18
    • Related Report
      2009 Annual Research Report
  • [Presentation] WRNIP1(WRN結合タンパク質)とRAD18の相互作用の解析2009

    • Author(s)
      吉村明、立石智、関政幸、榎本武美
    • Organizer
      遺伝学研究所研究集会
    • Place of Presentation
      遺伝学研究所(三島市)
    • Year and Date
      2009-09-07
    • Related Report
      2010 Final Research Report
  • [Presentation] ヒストンシャペロンFACTのDNA複製における機能解析2009

    • Author(s)
      阿部拓也、榎本武美
    • Organizer
      第6回 東北大学バイオサイエンスシンポジウム
    • Place of Presentation
      仙台国際センター(仙台)
    • Year and Date
      2009-06-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] The role of FACT in DNA replication(招待講演)2009

    • Author(s)
      榎本武美
    • Organizer
      Swiss-Japan joint meeting on the molecular mechanisms regulating "Chromosome dynamics and genome stability"
    • Place of Presentation
      Villars Ollons(スイス)
    • Year and Date
      2009-05-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] WRNIP1のRAD18-RAD6複合体への結合と複合体のDNA結合に及ぼす影響2009

    • Author(s)
      吉村明、金森允、多田周右、立石智、関政幸、榎本武美
    • Organizer
      日本薬学会第129年会
    • Place of Presentation
      京都国際会議場(京都市)
    • Year and Date
      2009-03-26
    • Related Report
      2010 Final Research Report
  • [Presentation] SOD1枯渇によるゲノムの不安定化と細胞死はアスコルビン酸で抑制される2008

    • Author(s)
      井上絵里
    • Organizer
      第31回日本分子生物学会年会第81回日本生化学会大会合同大会
    • Place of Presentation
      兵庫県神戸市
    • Year and Date
      2008-12-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] Requisite conditions for sumoylation of Rad52 and enhancement of the modification in checkpoint mutants2008

    • Author(s)
      大内貴司
    • Organizer
      第31回日本分子生物学会年会第81回日本生化学会大会合同大会
    • Place of Presentation
      兵庫県神戸市
    • Year and Date
      2008-12-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] WRNIP1はRAD18-RAD6に結合し、RAD18-RAD6のもつ複製フォーク様構造への結合を阻害する2008

    • Author(s)
      吉村明
    • Organizer
      第31回日本分子生物学会年会第81回日本生化学会大会合同大会
    • Place of Presentation
      兵庫県神戸市
    • Year and Date
      2008-12-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] WRNIP1はRAD18-RAD6に結合し、RAD18-RAD6のもつ複製フォーク様構造への結合を阻害する2008

    • Author(s)
      吉村明、金森允、多田周右、立石智、関政幸、榎本武美
    • Organizer
      第31回日本分子生物学会年会・第81回日本生化学会大会合同大会
    • Place of Presentation
      神戸ポートアイランド(神戸市)
    • Year and Date
      2008-12-10
    • Related Report
      2010 Final Research Report
  • [Presentation] Accumulation of sumoylated Rad52 in checkpoint mutants2008

    • Author(s)
      Ohuchi, T.
    • Organizer
      The 6th 3R Symposium
    • Place of Presentation
      静岡県嬬恋市
    • Year and Date
      2008-10-27
    • Related Report
      2008 Annual Research Report
  • [Presentation] Significance of regulating Cdc6 during the initiation of DNA replication2008

    • Author(s)
      Kundu, R. L.
    • Organizer
      NCRI Cancer Conference 2008
    • Place of Presentation
      英国、バーミンガム
    • Year and Date
      2008-10-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] KU70 and DNA-PKcs are essential for the rapid induction of apoptosis after massive DSB formation2008

    • Author(s)
      Abe, T.
    • Organizer
      Ataxia-telangiectasia workshop2008
    • Place of Presentation
      滋賀県大津市
    • Year and Date
      2008-04-25
    • Related Report
      2008 Annual Research Report
  • [Book] 染色体サイクル(蛋白質核酸酵素別冊)2009

    • Author(s)
      関政幸・Mong Sing Lai・榎本武美
    • Publisher
      共立出版
    • Related Report
      2010 Final Research Report
  • [Book] 染色体サイクル2009

    • Author(s)
      関政幸
    • Publisher
      共立出版
    • Related Report
      2008 Annual Research Report

URL: 

Published: 2008-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi