重新审视细菌中糖利用的层级结构
Rethinking the Hierarchy of Sugar Utilization in Bacteria.
作者信息
Beisel Chase L, Afroz Taliman
机构信息
Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA.
出版信息
J Bacteriol. 2015 Nov 16;198(3):374-6. doi: 10.1128/JB.00890-15. Print 2016 Feb 1.
Abstract
Bacteria are known to consume some sugars over others, although recent work reported by Koirala and colleagues in this issue of the Journal of Bacteriology (S. Koirala, X. Wang, and C. V. Rao, J Bacteriol 198:386-393, 2016, http://dx.doi.org/10.1128/JB.00709-15) revealed that individual cells do not necessarily follow this hierarchy. By studying the preferential consumption of l-arabinose over d-xylose in Escherichia coli, those authors found that subpopulations consume one, the other, or both sugars through cross-repression between utilization pathways. Their findings challenge classic assertions about established hierarchies and can guide efforts to engineer the simultaneous utilization of multiple sugars.
摘要
众所周知，细菌消耗某些糖类的能力强于其他糖类，不过科伊拉勒及其同事在本期《细菌学杂志》上发表的最新研究（S. 科伊拉勒、X. 王和C. V. 拉奥，《细菌学杂志》198:386 - 393，2016年，http://dx.doi.org/10.1128/JB.00709 - 15）表明，单个细胞不一定遵循这种等级关系。通过研究大肠杆菌中L - 阿拉伯糖相对于D - 木糖的优先消耗情况，这些作者发现亚群通过利用途径之间的交叉抑制来消耗其中一种、另一种或两种糖类。他们的发现挑战了关于既定等级关系的经典论断，并可为设计多种糖类同时利用的研究提供指导。
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