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Laboratory for Protein Conformation Diseases
Motomasa TANAKA
Laboratory Head
Motomasa TANAKA (Ph.D.)
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Research Areas

We investigate molecular basis of neurodegenerative disorders and psychiatric diseases by using a variety of methods including neurobiology, genetics, structural biology and proteomics. Furthermore, we aim to reveal structural basis of prion strains and transmission barriers in yeast prion systems by various biophysical techniques and yeast genetics. We also search for and analyze novel cytoplasmic genetic elements and functional amyloids that play physiological roles in cells.

Research Subject

  1. Protein misfolding and neurodegenerative diseases
  2. Molecular basis of mental disorders
  3. Identification and analysis of novel functional amyloid
  4. Structural basis of yeast prion strains and transmission barriers

Related links

  1. RIKEN Brain Science Institute Website_Laboratories PageNew Window
  2. Individual Website Laboratory PageNew Window

Press release

January 18, 2010
Effect of yeast prion protein oligomer formation process on infection efficacy clarified
May 26, 2009
Differences in protein coagulation structure contribute to the onset of Huntington's disease. The degree of toxicity is found to be regulated by proteins in the same amino acid configuration forming different amyloidal structures.

RIKEN RESEARCH

October 05, 2012
A new twist on protein misfolding
Cellular accumulation of misfolded protein clumps may be a survival advantage rather than a liability under certain environmental conditionsNew Window
April 02, 2010
Unfolding the genesis of 'bad' seeds
Specific characteristics of small clumps of prion proteins dictate the conformation of larger aggregates that could influence disease symptomsNew Window
July 31, 2009
A slight twist with serious consequences
Subtle structural changes can markedly affect one protein's toxic impact, and may help explain the distinctive pathology of Huntington's diseaseNew Window

List of Selected Publications

  1. Suzuki, G., Shimazu, N., and Tanaka, M.:
    "A Yeast Prion, Mod 5, Promotes Acquired Drug Resistance for Cell Survival under Environmental Stress"
    Science, in press (2012)
  2. Tanaka, M.:
    " Protein misfolding: tracking a toxic polyglutamine epitope"
    Nat. Chem. Biol., 7, 861-862 (2011).
  3. Tonoki A, Kuranaga E, Ito N, Nekooki-Machida Y, Tanaka M, and Miura M:
    " Aging causes distinct characteristics of polyglutamine amyloids in vivo"
    Genes Cells, 16, 557-64 (2011).
  4. Foo CK, Ohhashi Y, Kelly MJ, Tanaka M, and Weissman JS:
    " Radically different amyloid conformations dictate the seeding specificity of a chimeric Sup35 prion"
    J. Mol. Biol., 408, 1-8 (2011)
  5. Ohhashi, Y., Ito, K., Toyama, GH, Weissman, JS., and Tanaka, M.:
    " Differences in prion strain conformations result from non-native interactions in a nucles"
    Nat. Chem. Biol., 6, 225-230 (2010).
  6. Nekooki-Machida, Y., Kurosawa, M., Nukina, N., Ito, K, Oda, T., and Tanaka, M.:
    " Distinct conformations of in vitro and in vivo amyloids of huntingtin-exon1 show different cytotoxicity"
    Proc. Natl. Acad. Sci. U. S. A., 106, 9679-9684 (2009).
  7. Krzewska, J., Tanaka, M., Burston, SG., and Melki, R.:
    " Biochemical and functional analysis of the assembly of full-length Sup35p and its prion-forming domain"
    J. Biol. Chem., 282, 1679-1686 (2007).
  8. Tanaka, M., Collins, SR., Toyama, BH., and Weissman, JS.:
    " The physical basis of how prion conformations determine strain phenotypes"
    Nature, 442, 585-589 (2006).
  9. Tanaka, M., Chien, P., Yonekura, K., and Weissman, JS.:
    " Mechanism of cross-species prion transmission: an infectious conformation compatible with two highly divergent yeast prion proteins"
    Cell, 121, 49-62 (2005).
  10. Tanaka, M., Machida, Y., Niu, S., Ikeda, T., Jana, NR., Doi, H., Kurosawa, M., Nekooki, M., and Nukina, N.:
    " Trehalose alleviates polyglutamine-mediated pathology in a mouse model of Huntington disease"
    Nat. Med., 10, 148-154 (2004).

Members

Principal Investigator

Motomasa TANAKA
Laboratory Head

Members

Yusuke KOMI
Research Scientist
Genjiro SUZUKI
Research Scientist
Yumiko OHHASHI
Research Scientist
Ryo ENDO
Research Scientist
Chien-Wen CHEN
Research Scientist
Kai-Wan Kelvin HUI
Visiting Researcher
Hiroki YOSHISE
Student Trainee
Yoko NEKOOKI
Technical Staff I
Mao YAMAGUCHI
Technical Staff I
Miwa HIGAKI
Part-time Staff
Naomi TAKAHASHI
Part-time Staff
Mizue HONDA
Part-time Staff