生物催化技术

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天津工生所在淀粉修饰方面取得新进展
合成生物学与绿色生物制造· 2025-09-04 01:44
Core Viewpoint - The article discusses recent advancements in starch modification through the research conducted by the Tianjin Institute of Industrial Biotechnology, focusing on the enzyme Amylomaltase (AM) and its potential applications in addressing food security and carbon neutrality [5][6]. Group 1: Research Findings - The research team utilized large-scale molecular simulations and quantum mechanics/molecular mechanics (QM/MM) calculations to reveal the complete catalytic cycle of AM, identifying the rate-limiting steps in cycloamyloses (CA) synthesis [6][7]. - The study demonstrated that by strategically adjusting the polysaccharide chain transfer steps, several active mutant variants were obtained, enhancing enzyme performance primarily through reduced substrate transfer affinity [6][7]. - Mass spectrometry confirmed the generation of cycloamyloses with degrees of polymerization ranging from 22 to 61, validating theoretical predictions [6][7]. Group 2: Industrial Implications - The research provides a systematic molecular-level understanding of the biosynthesis process of CA, offering a clear engineering blueprint for the AM family, which could lead to more efficient and specific glycosyltransferases [6][7]. - The findings are significant for the industrial application of starch modification, contributing to the development of biobased materials and energy systems utilizing non-grain resources [9][11]. Group 3: Support and Collaboration - The research was supported by the Chinese Academy of Sciences' strategic pilot technology projects and the Tianjin Synthetic Biology Technology Innovation Capability Enhancement Action [7]. - Collaborations included contributions from various institutions, highlighting the interdisciplinary nature of the research [7].