production of adonic acids. In the present study, Pseudomonas fragi TCCC11892 was found to be an efficient producer of aldonicacids, with the production of galactonic and L-rhamnonic acid by P. fragi reported for the first time. The semi-continuous production of maltobionic acid and lactobionic acid was developed for P. fragi TCCC11892, achieving a yield of over 90 g L−1 for the first 7 cycles. The
醛糖酸因其在纳米技术、食品、制药和化学工业中的应用而受到越来越多的关注。具有醛糖氧化活性的微生物,而不是纯化的酶,被用于商业生产,但成功率有限。因此,使用具有更有效和新颖的生物催化活性的菌株来开发用于生产阿多糖酸的新工艺仍然非常重要。在本研究中,Pseudomonas fragi TCCC11892 被发现是一种高效的醛糖酸生产者,首次报道了P. fragi生产半乳糖酸和L-鼠李糖酸。为苦瓜开发了麦芽糖酸和乳糖酸的半连续生产TCCC11892,前 7 个循环的产量超过 90 g L -1。当使用废奶酪乳清作为廉价发酵培养基时,还观察到了P. fragi在生产乳糖酸 (119 g L -1 ) 方面的优异性能。用P. fragi TCCC11892 细胞扩大上述用于生产醛糖酸的过程应该有助于它们的商业应用。
Upson; Noyce; Albert, Journal of the American Chemical Society, 1939, vol. 61, p. 780,784
作者:Upson、Noyce、Albert
DOI:——
日期:——
The Catalytic Hydrogenation of Aldonic Acid Delta and Gamma Lactones and of the Aldoses
作者:J. W. E. Glattfeld、G. Weber Schimpff
DOI:10.1021/ja01314a050
日期:1935.11
Moore; Link, Journal of Biological Chemistry, 1940, vol. 133, p. 293,304
作者:Moore、Link
DOI:——
日期:——
Substrate specificity of galactokinase from Streptococcus pneumoniae TIGR4 towards galactose, glucose, and their derivatives
Galactokinases (GalKs) have attracted significant research attention for their potential applications in the enzymatic synthesis of unique sugar phosphates. The galactokinase (GalKSpe4) cloned from Streptococcus pneumoniae TIGR4 presents a remarkably broad substrate range including 14 diverse natural and unnatural sugars. TLC and MS studies revealed that GalKSpe4 had relaxed activity towards galactose derivatives with modifications on the C-6, 4- or 2-positions. Additionally, GalKSpe4 can also tolerate glucose while glucose derivatives with modifications on the C-6, 4- or 2-positions were unacceptable. More interestingly, GalKSpe4 can phosphorylate L-mannose in moderate yield (43%), while other L-sugars such as L-Gal cannot be recognized by this enzyme. These results are very significant because there is rarely enzyme reported that can phosphorylate such uncommon substrates as L-mannose. (C) 2012 Elsevier Ltd. All rights reserved.