Sandbox Wabash3

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(Mechanism of Trypsin)
(Mechanism of Trypsin)
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Kenton Hicks, Kyle Stucker, Allen Betts
Kenton Hicks, Kyle Stucker, Allen Betts
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Trypsin is serine protease which catalyzes the hydrolysis of peptide bonds of a substrate via an acylation reaction and a deacylation reaction. In the first (acylation) reaction, the nucleophilic serine attacks the substrate scissile bond, forming a tetrahedral intermediate and then a covalent acyl-enzyme with the release of the C-terminal fragment. In the second (deacylation) reaction, a water molecule attacks the acyl-enzyme, leading to a second tetrahedral intermediate followed by release of the N-terminal fragment. The specificity of substrates is determined by the structure of its active site, which contains <scene name='72/725340/Ser195_stick_protein/5'>Ser-195</scene>, <scene name='72/725340/His-57/2'>His-57</scene>, and <scene name='72/725340/Asp_189/3'>Asp-189</scene>.
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Trypsin is serine protease which catalyzes the hydrolysis of peptide bonds of a substrate via an acylation reaction and a deacylation reaction. In the first (acylation) reaction, the nucleophilic serine attacks the substrate scissile bond, forming a tetrahedral intermediate and then a covalent acyl-enzyme with the release of the C-terminal fragment. In the second (deacylation) reaction, a water molecule attacks the acyl-enzyme, leading to a second tetrahedral intermediate followed by release of the N-terminal fragment. The specificity of substrates is determined by the structure of its active site, which contains <scene name='72/725340/Ser195_stick_protein/5'>Ser-195</scene>, <scene name='72/725340/His-57/2'>His-57</scene>(which has two very likely confirmations so there are two present in this model), and <scene name='72/725340/Asp_189/3'>Asp-189</scene>.
== <ref>PMID:16636277</ref> ==
== <ref>PMID:16636277</ref> ==

Revision as of 02:01, 19 February 2016

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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