Enzymes Acting on d-Amino Acid Containing Peptides
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Using a synthetic oligopeptide (d -Phe)4 , a microorganism Bacillus cereus DF4-B producing alkaline d -peptidase (ADP) was isolated. The enzymatic properties have been characterized; the enzyme showed d -stereospecific dipeptidyl aminopeptidase and endopeptidase activities. The enzyme was active toward (d -Phe) n , Boc-(d -Phe) n , (d -Phe) n methyl ester, d -Phe-NH2 , Boc-(d -Phe) n methyl ester, and Boc-(d -Phe) n tert -butyl ester, but not toward (d -Ala) n (n = 2–4), (d -Val)3 , and (d -Leu)2 .
![[(1S)-1-[[(2S)-2-[[(2S)-5-amino-2-[[(2S)-2-[[(2S)-2-(6-aminohexanoylamino)-3-phenylpropanoyl]amino]-3-hydroxypropanoyl]amino]-5-oxopentanoyl]amino]hexanoyl]amino]-4-bromobutyl]boronic acid，Moligand™，阿拉丁](https://img1.dxycdn.com/p/s14/2024/0619/722/0483842343985733081.jpg!wh200)
