Preparation of a Cross-Linked Porous Protein Crystal Containing Ru Carbonyl Complexes as a CO-Releasing Extracellular Scaffold
Tabe, H., Fujita, K., Abe, S., Tsujimoto, M., Kuchimaru, T., Kizaka-Kondoh, S., Takano, M., Kitagawa, S., Ueno, T.(2015) Inorg Chem 54: 215-220
- PubMed: 25494847 
- DOI: https://doi.org/10.1021/ic502159x
- Primary Citation of Related Structures:  
4W94, 4W96 - PubMed Abstract: 
Protein crystals generally are stable solid protein assemblies. Certain protein crystals are suitable for use as nanovessels for immobilizing metal complexes. Here we report the preparation of ruthenium carbonyl-incorporated cross-linked hen egg white lysozyme crystals (Ru·CL-HEWL). Ru·CL-HEWL retains a Ru carbonyl moiety that can release CO, although a composite of Ru carbonyl-HEWL dissolved in buffer solution (Ru·HEWL) does not release CO. We found that treatment of cells with Ru·CL-HEWL significantly increased nuclear factor kappa B (NF-κB) activity as a cellular response to CO. These results demonstrate that Ru·CL-HEWL has potential for use as an artificial extracellular scaffold suitable for transport and release of a gas molecule.
Organizational Affiliation: 
Graduate School of Engineering, Kyoto University, Katsura , Nishikyo-ku, Kyoto 615-8510, Japan.