Peptide substrates for Rho-Associated kinase 2 (Rho-Kinase 2/ROCK2)

Jeong Hun Kang, Daisuke Asai, Akira Tsuchiya, Takeshi Mori, Takuro Niidome, Yoshiki Katayama

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Peptide substrates sensitive for a certain protein kinase could be important for new-drug development and to understand the mechanism of diseases. Rho-associated kinase (Rho-kinase/ROCK) is a serine/threonine kinase, and plays an important part in cardiovascular disease, migration and invasion of tumor cells, and in neurological disorders. The purpose of this study was to find substrates with high affinity and sensitivity for ROCK2. We synthesized 136 peptide substrates from protein substrates for ROCK2 with different lengths and charged peptides. Incorporation of 32P [counts per minute (CPM)] for each peptide substrate was determined by the radiolabel assay using [γ- 32P]ATP. When the top five peptide substrates showing high CPMs (R4, R22, R133, R134, and R135) were phosphorylated by other enzymes (PKA, PKCα, and ERK1), R22, R133, and R135 displayed the highest CPM level for ROCK2 compared with other enzymes, whereas R4 and R134 showed similar CPM levels for ROCK2 and PKCα. We hypothesize that R22, R133, and R135 can be useful peptide substrates for ROCK2.

Original languageEnglish
Article numbere22699
JournalPloS one
Issue number7
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General


Dive into the research topics of 'Peptide substrates for Rho-Associated kinase 2 (Rho-Kinase 2/ROCK2)'. Together they form a unique fingerprint.

Cite this