Budget Amount *help |
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2012: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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Outline of Final Research Achievements |
Catalytic reaction of a Fe-type nitrile hydratase betaR56K mutant was studied by time-resolved crystallography. The results showed that the metal-coordinated substrate is nucleophilically attacked by the O(SO-) atom of alphaCys114-SO-;, followed by nucleophilic attack of the S(SO-) atom by a betaArg56-activated water molecule to release the product amide and regenerate alphaCys114-SO-;. Also, kinetic as well as crystallographic studies on the mutant SCNases revealed that both NHase and SCNase share the catalytic mechanism and that the size and shape of their substrate binding pockets are predominantly control the substrate selectivity.
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