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Article: New findings from Yeshiva University, Medical Department in the area of biochemistry published.
- Article from:
- Chemicals & Chemistry
- Article date:
- June 26, 2009
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According to recent research from the United States, "Human PNP is a homotrimer containing three tryptophan residues at positions 16, 94, and 178, all remote from the catalytic site. The catalytic sites of PNP are located near the subunit-subunit interfaces where F159 is a catalytic site residue donated from an adjacent subunit."
"F159 covers the top 0) surface of the ribosyl group at the catalytic site. QM/MM calculations of human PNP have shown that F159 is the center of the most mobile region of the protein providing access to the substrate in the active site. F159 is also the key residue in a cluster of hydrophobic residues that shield catalytic site ligands ...
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