کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6490626 43376 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enzymatic preparation of d-phenyllactic acid at high space-time yield with a novel phenylpyruvate reductase identified from Lactobacillus sp. CGMCC 9967
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Enzymatic preparation of d-phenyllactic acid at high space-time yield with a novel phenylpyruvate reductase identified from Lactobacillus sp. CGMCC 9967
چکیده انگلیسی
An NADH-dependent phenylpyruvate reductase (LaPPR) was identified through screening the shotgun library of Lactobacillus sp. CGMCC 9967. It belongs to d-3-phosphoglycerate dehydrogenase (PGDH) subfamily of 2-hydroxy acid dehydrogenase superfamily. LaPPR was stable at pH 6.5 and 30 °C, with a half-life of 152 h. LaPPR has a substrate preference towards aromatic to aliphatic keto acids, and various keto acids could be reduced into d-hydroxy acids with excellent enantioselectivity (>99%). By construction the coexpression system with glucose dehydrogenase, as much as 100 g L−1 phenylpyruvic acid was asymmetrically reduced into d-phenyllactic acid with 91.3% isolation yield and 243 g L−1 d−1 productivity. The results suggest that LaPPR is a promising biocatalyst for the efficient synthesis of optically pure d-phenyllactic acid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biotechnology - Volume 222, 20 March 2016, Pages 29-37
نویسندگان
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