RIKEN Center for Biosystems Dynamics Research Laboratory for Nonnatural Amino Acid Technology
Team Leader: Kensaku Sakamoto (Ph.D.)
Research Summary

We plan to genetically encode novel and useful amino acids, in order to increase the functional and structural variety in recombinant proteins and provide unique technical supports for structural biology and epigenetics drug development, and also plan to carry forward the cell-free translation technology.
Main Research Fields
- Biological Sciences
Related Research Fields
- Medicine, Dentistry & Pharmacy
Keywords
- Synthetic amino acid
- Protein engineering
- Protein synthesis
- Biologics
- Antibody
Selected Publications
- 1.Sakamoto, K. and Hayashi, A.:
"Synthetic tyrosine tRNA molecules with noncanonical secondary structures"
Int. J. Mol. Sci. 20(1), 92 (2019) - 2.Teramoto, H., Amano, Y., Iraha, F., Kojima, K., Ito, T., and Sakamoto, K.:
"Genetic code expansion of the silkworm Bombyx mori to functionalize silk fiber"
ACS Synth. Biol. 7, 801-806 (2018) - 3.Ohtake, K., and Mukai, T., Iraha, F., Takahashi, M., Haruna, K., Date, M., Yokoyama, K., and Sakamoto, K.:
"Engineering an automaturing transglutaminase with enhanced thermostability by genetic code expansion with two codon reassignments"
ACS Synth. Biol. 7, 2170-2176 (2018) - 4.Handoko, L., Kaczkowski, B., Hon C.-C., Lizio, M., Wakamori, M., Matsuda T., Ito T., Jeyamohan P., Sato, Y., Sakamoto, K., Yokoyama, S., Kimura, H., Minoda, A., and Umehara T.:
"JQ1 affects BRD2-dependent and independent transcription regulation without disrupting H4-hyperacetylated chromatin states"
Epigenetics 13, 410-431 (2018) - 5.Takahashi, M., and Sakamoto, K.:
"Engineering of Escherichia coli Β-lactamase TEM-1 variants showing higher activity under acidic conditions than at the neutral pH"
Biochem. Biophys. Res. Commun. 505, 333-337 (2018) - 6.Yamaguchi, A., Iraha, F., Ohtake, K., and Sakamoto, K.:
"Pyrrolysyl-tRNA synthetase with a unique architecture enhances the availability of lysine derivatives in synthetic genetic codes"
Molecules 23, 2460 (2018) - 7.Osamura, T., and OkudaM., Yamaguchi, A., Ohtake, K., Sakamoto, K., and Takimura, Y.:
"Variants of the industrially relevant protease KP-43 with suppressed activity under alkaline conditions developed using expanded genetic codes"
Biochem. Biophys. Rep., 17, 93-96 (2018) - 8.Yamaguchi, A., Matsuda, T., Ohtake, K., Yanagisawa, T., Yokoyama, S., Fujiwara, Y., Watanabe, T., Hohsaka, T., and Sakamoto, K.:
"Incorporation of a doubly functionalized synthetic amino acid into proteins for creating chemical and light-induced conjugates"v
Bioconjug Chem. 27, 198-206 (2015) - 9.Mukai, T., Yamaguchi, A., Ohtake, K., Takahashi, M., Hayashi, A., Iraha, F., Kira, S., Yanagisawa, T., Yokoyama, S., Hoshi, H., Kobayashi, T. and Sakamoto, K.:
"Reassignment of a rare sense codon to a non-canonical amino acid in Escherichia coli"
Nucleic. Acids Res. 43, 8111-8122 (2015) - 10.Mukai, T., Hoshi, H., Ohtake, K., Takahashi, M., Yamaguchi, A., Hayashi, A., Yokoyama, S., and Sakamoto, K.:
"Highly reproductive Escherichia coli cells with no specific assignment to the UAG codon"
Sci Rep. 5: 9699 (2015)
Recent Research Results
Related Links
Lab Members
Principal investigator
- Kensaku Sakamoto
- Team Leader
Core members
- Motoaki Wakiyama
- Deputy Team Leader
- Akira Wada
- Senior Research Scientist
- Akiko Matsumoto
- Senior Technical Scientist
- Kazumasa Ohtake
- Research Scientist
- Mihoko Takahashi
- Technical Scientist
Contact Information
W223 2F West Research Building
1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
Tel: +81-(0)45-503-9459
Email: kensaku.sakamoto [at] riken.jp