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Trypsin is a serine protease that contains serine, histidine<scene name='72/725334/Beidou_test_his/3'>HIS</scene>, and aspartic acid residues. Trypsin catalyzes peptide bond hydrolysis through acid catalysis, base catalysis, and covalent catalysis. In the first step serine acts as a nucleophile to attack the substrate peptide bond, which forms a tetrahedral intermediate via covalent catalysis. Then a acyl-enzyme intermediate is formed and the C-terminal fragment is released. A water molecule attacks the acyl enzyme leading to the creation of a second tetrahedral intermediate. This is followed by the release of the N-terminal fragment, which results in the creation of the active enzyme.
Trypsin is a serine protease that contains serine, histidine<scene name='72/725334/Beidou_test_his/3'>HIS</scene>, and aspartic acid residues. Trypsin catalyzes peptide bond hydrolysis through acid catalysis, base catalysis, and covalent catalysis. In the first step serine acts as a nucleophile to attack the substrate peptide bond, which forms a tetrahedral intermediate via covalent catalysis. Then a acyl-enzyme intermediate is formed and the C-terminal fragment is released. A water molecule attacks the acyl enzyme leading to the creation of a second tetrahedral intermediate. This is followed by the release of the N-terminal fragment, which results in the creation of the active enzyme.
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Scene 1:catalytic triad <scene name='72/725334/Catalytic_triad/1'>catalytic triad</scene>
BY: MICHAEL GREEN AND AARON BECKER AND BEIDUO CHENG
BY: MICHAEL GREEN AND AARON BECKER AND BEIDUO CHENG

Revision as of 21:42, 18 February 2016

The Mechanism of Trypsin

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References

  1. Radisky ES, Lee JM, Lu CJ, Koshland DE Jr. Insights into the serine protease mechanism from atomic resolution structures of trypsin reaction intermediates. Proc Natl Acad Sci U S A. 2006 May 2;103(18):6835-40. Epub 2006 Apr 24. PMID:16636277

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