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  • Title: Arginyl residues in the NADPH-binding sites of phenol hydroxylase.
    Author: Sejlitz T, Neujahr HY.
    Journal: J Protein Chem; 1991 Feb; 10(1):43-8. PubMed ID: 2054062.
    Abstract:
    Phenol hydroxylase was inactivated by the arginine reagents 2,3-butanedione, 1,2-cyclohexanedione, and phenylglyoxal. The cosubstrate NADPH, as well as NADPH+ and several analogues thereof, protected the enzyme against inactivation. Phenol did not protect the activity against any of the reagents used, nor did modification by 2,3-butanedione affect the binding of phenol. We propose the presence of arginyl residues in the binding sites for the adenosine phosphate part of NADPH.
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