Download MendeleyStabilization by fusion to the C-terminus of hyperthermophile Sulfolobus tokodaii RNase HI: a possibility of protein stabilization tag
Takano, K., Okamoto, T., Okada, J., Tanaka, S., Angkawidjaja, C., Koga, Y., Kanaya, S.(2011) PLoS One 6: e16226-e16226
- PubMed: 21283826
- DOI: https://doi.org/10.1371/journal.pone.0016226
- Primary Citation of Related Structures:
3ALY - PubMed Abstract:
RNase HI from the hyperthermophile Sulfolobus tokodaii (Sto-RNase HI) is stabilized by its C-terminal residues. In this work, the stabilization effect of the Sto-RNase HI C-terminal residues was investigated in detail by thermodynamic measurements of the stability of variants lacking the disulfide bond (C58/145A), or the six C-terminal residues (ΔC6) and by structural analysis of ΔC6. The results showed that the C-terminal does not affect overall structure and stabilization is caused by local interactions of the C-terminal, suggesting that the C-terminal residues could be used as a "stabilization tag." The Sto-RNase HI C-terminal residues (-IGCIILT) were introduced as a tag on three proteins. Each chimeric protein was more stable than its wild-type protein. These results suggested the possibility of a simple stabilization technique using a stabilization tag such as Sto-RNase HI C-terminal residues.
Organizational Affiliation:
Department of Material and Life Science, Osaka University, Osaka, Japan. ktakano@mls.eng.osaka-u.ac.jp
