1tx7

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Image:1tx7.gif

1tx7, resolution 1.75Å

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Bovine Trypsin complexed with p-amidinophenylmethylphosphinic acid (AMPA)

Overview

p-amidinophenylmethylphosphinic acid (AMPA) was designed, synthesized and crystallized in complex with trypsin to study interactions with the oxyanion hole at the S1 site. In comparison to benzamidine, AMPA shows improved activity, which the crystal structure demonstrates to result from hydrogen bonds between the negatively charged phosphinic acid group and the catalytic residues at the oxyanion hole.

About this Structure

1TX7 is a Single protein structure of sequence from Bos taurus with and as ligands. Active as Trypsin, with EC number 3.4.21.4 Full crystallographic information is available from OCA.

Reference

An oxyanion-hole selective serine protease inhibitor in complex with trypsin., Cui J, Marankan F, Fu W, Crich D, Mesecar A, Johnson ME, Bioorg Med Chem. 2002 Jan;10(1):41-6. PMID:11738605

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