Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain.
Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain.
Bioresour Technol. 2021 Mar;324:124623. doi: 10.1016/j.biortech.2020.124623. Epub 2020 Dec 27.
The term hemicellulose groups different polysaccharides with heterogeneous structures, mannans, xyloglucans, mixed-linkage β-glucans and xylans, which differ in their backbone and branches, and in the type and distribution of glycosidic linkages. The enzymatic degradation of these complex polymers requires the concerted action of multiple hemicellulases and auxiliary enzymes. Most commercial enzymes are produced by Trichoderma and Aspergillus species, but recent studies have disclosed Penicillium and Talaromyces as promising sources of hemicellulases. In this review, we summarize the current knowledge on the hemicellulolytic system of these genera, and the role of hemicellulases in the disruption and synthesis of glycosidic bonds. In both cases, the enzymes from Penicillium and Talaromyces represent an interesting alternative for valorization of lignocellulosic biomass in the current framework of circular economy.
半纤维素这一术语将具有不同结构的不同多糖归为一组，如甘露聚糖、木葡聚糖、杂合β-葡聚糖和木聚糖，它们在主链和支链以及糖苷键的类型和分布上存在差异。这些复杂聚合物的酶促降解需要多种半纤维素酶和辅助酶的协同作用。大多数商业酶是由木霉属和曲霉属产生的，但最近的研究表明，青霉属和拟青霉属也是半纤维素酶的有前途的来源。在这篇综述中，我们总结了这些属的半纤维素分解系统的现有知识，以及半纤维素酶在糖苷键断裂和合成中的作用。在这两种情况下，青霉属和拟青霉属的酶都为在当前循环经济框架内对木质纤维素生物质进行增值提供了一种有趣的选择。
