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The transcription factor of cyclin-dependent kinase 2 (cdk2) gene.

Research Project

Project/Area Number 06672176
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Biological pharmacy
Research InstitutionKANAZAWA UNIVERSITY

Principal Investigator

OHBA Yoshiki  KANAZAWA UNIVERSITY FACULTY OF PHARM.SCI.PROFESSOR, 薬学部, 教授 (10012634)

Co-Investigator(Kenkyū-buntansha) YASUDA Hideyo  KANAZAWA UNIVERSITY FACULTY OF PHARM.SCI.ASSOCIATE PROFESSOR, 薬学部, 助教授 (40111554)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCell cycle / Regulation of transcription / Kinase / Cultured cells
Research Abstract

cdk2 is a protein kinase and its activity changes during the cell cycle. It is postulated that this change of activity follows the change of transcription rate of the gene and post-translational modification. We found the mRNA of cdk2 begun to increase at G1/S and reached to the largest level at S-phase then declined thereafter. We showed that the transcription amount of cdk2 changed during the cell cycle. To determine the DNA region which involved in the cell-cycle dependent regulation of the gene, mouse cdk2 gene was cloned. And fragments from+68bp to various sites of 5'upstream region were subcloned, and luciferase reporters were prepared. These reporters were transfected into CHO cells, and stable transformants were obtained. After synchronization of the cell cycle of these stable transformants, the activities of luciferase were assayd. We showed that the region from +68bp to- 419bp was required for cell-cycle dependent expression of luciferase. We also studied the post-translational modification of cdk2. It is suggested that the activity of cdk family proteins changes with their phospyorylation and dephosphorylation, however, the kinase (s) and phosphatase (s) are not well understood. wee1 is postulated as the one of such kinases, and we cloned cDNA of mouse wee1. This clone consisted with 2258bp and its open reading frame corresponds to a 646 amino acid residues. This mouse wee1 clone was inserted into vaculovirus transfer vector, and studied on phosphorylation. The results obtained were 1) mouse wee1 was inactivated by a phosphorylation of an amino acid residue of N-terminal region of the protein, 2) mouse wee1 phosphorylated the cdc2 kinase. We study if mouse wee1 phosphorylates cdk2, as well.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] R.Honda: "Mouse p87 ^<wee1> kinase is regulated by M-phase specific phosphorylation" Chromosome Res.,. 3. 300-308 (195)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Nagai: "Ubiquitin-activating enzyme,E1,is phosphorylated in mammalian cells by the protein kinase cdc2" J.Cell Sci.,. 108. 2145-2152 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] R.Honda: "Mouse p87^<wee1> kinase is regulated by M-phase specific phosphorylation." Chromosome Res. 3. 300-308 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Nagai: "Ubiquitin-activating enzyme, E1, is phosphorylated in mammalian cells by the protein kinase cdc2." J.Cell Sci.108. 2145-2152 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Nagai: "Ubiquitin-activating enzyme, E1, is phosphorylated in mammalian cells by the protein kinase cdc2." J. Cell Sci.,. 108. 2145-2152 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] R.Honda: "Mouse p87 weal kinase is regulated by M‐phase specifit phosphorylation" Chromosome Research. (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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