Tang Sophia N, Barnum Collin R, Szarzanowicz Matthew J, Sirirungruang Sasilada, Shih Patrick M
Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.
Feedstocks Division, Joint BioEnergy Institute, Emeryville, CA 94608, USA.
Biology (Basel). 2023 Dec 8;12(12):1505. doi: 10.3390/biology12121505.
Plants possess an innate ability to generate vast amounts of sugar and produce a range of sugar-derived compounds that can be utilized for applications in industry, health, and agriculture. Nucleotide sugars lie at the unique intersection of primary and specialized metabolism, enabling the biosynthesis of numerous molecules ranging from small glycosides to complex polysaccharides. Plants are tolerant to perturbations to their balance of nucleotide sugars, allowing for the overproduction of endogenous nucleotide sugars to push flux towards a particular product without necessitating the re-engineering of upstream pathways. Pathways to produce even non-native nucleotide sugars may be introduced to synthesize entirely novel products. Heterologously expressed glycosyltransferases capable of unique sugar chemistries can further widen the synthetic repertoire of a plant, and transporters can increase the amount of nucleotide sugars available to glycosyltransferases. In this opinion piece, we examine recent successes and potential future uses of engineered nucleotide sugar biosynthetic, transport, and utilization pathways to improve the production of target compounds. Additionally, we highlight current efforts to engineer glycosyltransferases. Ultimately, the robust nature of plant sugar biochemistry renders plants a powerful chassis for the production of target glycoconjugates and glycans.
植物具有天生的能力来生成大量的糖,并产生一系列源自糖的化合物,这些化合物可用于工业、健康和农业领域。核苷酸糖处于初级代谢和特殊代谢的独特交叉点,能够生物合成从小分子糖苷到复杂多糖等众多分子。植物能够耐受核苷酸糖平衡的扰动,这使得内源性核苷酸糖能够过量产生,从而推动代谢流朝着特定产物流动,而无需对上游途径进行重新设计。甚至可以引入生产非天然核苷酸糖的途径来合成全新的产物。能够进行独特糖化学反应的异源表达糖基转移酶可以进一步拓宽植物的合成范围,而转运蛋白可以增加糖基转移酶可利用的核苷酸糖的量。在这篇观点文章中,我们探讨了工程化核苷酸糖生物合成、转运和利用途径在提高目标化合物生产方面的近期成功案例和潜在的未来用途。此外,我们强调了当前在工程化糖基转移酶方面所做的努力。最终,植物糖生物化学的强大特性使植物成为生产目标糖缀合物和聚糖的有力底盘。