| Budget Amount *help |
¥24,180,000 (Direct Cost: ¥18,600,000、Indirect Cost: ¥5,580,000)
Fiscal Year 2016: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2015: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2014: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Outline of Final Research Achievements |
In this study, we analyzed the structure and function of the half pipe superfamily restriction enzyme, which is conserved in pathogenic bacteria such as Helicobacter and Campylobacter and in some hyperthermophilic archaea. The crystal structures of R.PabI, which is the first half pipe superfamily restriction enzyme found in the hyperthermophilic archaea Pyrococcus abyssi, in complexes with substrate, product, and nonspecific DNAs showed that R.PabI cleaves not a phosphodiester bond but an N-glycosidic bond in DNA, indicating that R.PabI cleaves DNA using DNA glycosylase activity. This is the first example of restriction enzymes that functions by using other than endonuclease activity (restriction DNA glycosylase). We also determined the crystal structures of half pipe super family restriction enzymes from pathogenic bacteria.
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