Functional analysis and application of an effective cell-preservation peptide CPP

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Antifreeze proteins (AFPs) found from many organisms can inhibit ice crystal growth for cold-survival. We preliminarily found that some AFPs also show cell-preservation ability and named them CPP (Cell-Preservation Peptide). During the 3-year research period, we have been tested structure-function relationship of various AFPs to obtain the most promising CPP. In 2013, we finally could develop a method to alive rat insulinoma cells for more than 5 days at +4 degree C by using a flat-fish-derived CPP (PLoS ONE, 2013). In addition, we published the 1st crystal structure of fungal AFP (PNAS, 2012) and structure-function of CPP3 based on the multi-dimensional NMR experiments (JBNMR, 2013). Biochechemical characterizations and many applicational results about AFP and CPP were also published: 23 publications (incl.19 peer-reviewed articles), 40 presentations (incl.14 invited speeches), and 1 patent claim.