Schroeder,E.; Luebke,K., Justus Liebigs Annalen der Chemie, 1962, vol. 655, p. 211 - 218
作者:Schroeder,E.、Luebke,K.
DOI:——
日期:——
Aminolytic reaction catalyzed by d-stereospecific amidohydrolases from Streptomyces spp
作者:Jiro Arima、Hitomi Ito、Tadashi Hatanaka、Nobuhiro Mori
DOI:10.1016/j.biochi.2011.04.020
日期:2011.9
From investigation of 2000 soil isolates, we identified two serine-type amidohydrolases that can hydrolyze D-aminoacyl derivatives from the culture supernatant of Streptomyces species 82F2 and 83D12. The enzymes, redesignated as 82F2-DAP and 83D12-DAP, were purified for homogeneity and characterized. Each enzyme had molecular mass of approximately 40 kDa, and each showed moderate stability with respect to temperature and pH. Among hydrolytic activities toward D-aminoacyl-pNAs, the enzymes showed strict specificity toward D-Phe-pNA, but showed broad specificity toward D-aminoacyl esters. The specific activity for D-Phe-pNA hydrolysis of 82F2-DAP was ten-fold higher than that of 83D12-DAP. As a second function, each enzyme showed peptide bond formation activity by its function of aminolysis reaction. Based on results of D-Phe D-Phe synthesis under various conditions, we propose a reaction mechanism for D-Phe D-Phe production. Furthermore, the enzymes exhibited peptide elongation activity, producing oligo homopeptide in a one-pot reaction. We cloned the genes encoding each enzyme, which revealed that the primary structure of each enzyme showed 30-60% identity with those of peptidases belonging to the clan SE, S12 peptidase family categorized as serine peptidase with D-stereospecificity. (C) 2011 Elsevier Masson SAS. All rights reserved.
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作者:Ismael J. Hidalgo、Pradip Bhatnagar、Chao‐Pin Lee、Joanne Miller、Gregory Cucullino、Philip. L. Smith
DOI:10.1023/a:1016259816661
日期:——
The Isomeric Dipeptides of Valine Including a Correction<sup>1</sup>
作者:J. W. Hinman、E. Louis Caron、Halvor N. Christensen
DOI:10.1021/ja01160a053
日期:1950.4
Synthesis of the Optically Active Tripeptides of Valine