| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
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| Outline of Final Research Achievements |
Virtually all chloroplasts/plastids in today’s photosynthetic/plastid-containing eukaryotes derive from one successful primary endosymbiotic event with a cyanobacterium-like ancestor. During evolution, massive transfer of genes from the endosymbiont to the host’s nuclear genome occurred concomitant with establishment of a protein transport system that allows these nucleus-encoded proteins back into the endosymbiotic organelle. Two successive protein translocons at the outer and inner envelope membranes of chloroplast, termed TOC and TIC, respectively, are responsible for this protein transport. We previously identified a novel inner envelope membrane protein complex consisting of Tic20, Tic56, Tic100, and Tic214 (Ycf1) in Arabidopsis. Furthermore, we have recently identified a completely novel ATPase complex at the inner envelope which functions as the TIC(20/56/100/214)-associated ATP-driven import motor for preprotein translocation.
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