Marine College, Shandong University, Weihai 264209, China.
State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao 266237, China.
Mar Drugs. 2024 Apr 28;22(5):203. doi: 10.3390/md22050203.
Marine macroalgae are increasingly recognized for their significant biological and economic potential. The key to unlocking this potential lies in the efficient degradation of all carbohydrates from the macroalgae biomass. However, a variety of polysaccharides (alginate, cellulose, fucoidan, and laminarin), are difficult to degrade simultaneously in a short time. In this study, the brown alga was found to be rapidly and thoroughly degraded by the marine bacterium B2Z047. This strain harbors a broad spectrum of carbohydrate-active enzymes capable of degrading various polysaccharides, making it uniquely equipped to efficiently break down both fresh and dried kelp, achieving a hydrolysis rate of up to 52%. A transcriptomic analysis elucidated the presence of pivotal enzyme genes implicated in the degradation pathways of alginate, cellulose, fucoidan, and laminarin. This discovery highlights the bacterium's capability for the efficient and comprehensive conversion of kelp biomass, indicating its significant potential in biotechnological applications for macroalgae resource utilization.
海洋大型藻类因其显著的生物和经济潜力而受到越来越多的关注。挖掘这种潜力的关键在于高效降解大型藻类生物质中的所有碳水化合物。然而，各种多糖（褐藻酸盐、纤维素、褐藻糖胶和昆布多糖）很难在短时间内同时降解。在这项研究中，海洋细菌 B2Z047 被发现能快速彻底地降解棕色海藻。该菌株拥有广泛的碳水化合物活性酶，能够降解各种多糖，使其具有独特的优势，能够高效地分解新鲜和干燥的海带，水解率高达 52%。转录组分析揭示了关键酶基因的存在，这些基因参与褐藻酸盐、纤维素、褐藻糖胶和昆布多糖的降解途径。这一发现突显了该细菌高效全面转化海带生物质的能力，表明其在大型藻类资源利用的生物技术应用中具有重要潜力。
