使用糖-二脂的糖系转移酶家族的多样性
Ida K S Meitil1, Garry P Gippert1, Kristian Barrett1
1Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark.
Communications biology
|March 7, 2024
概括
研究人员确定了17个新的甘氨基转移酶 (GT) 家族,其中14个为细菌聚糖胺聚合酶 (BP-Pols). 这些酶构建细菌表面,并在多种细菌中共享保存的反应立体化学.
科学领域:
- 生物化学 生物化学
- 微生物学 微生物学
- 酶学 是一种酶学.
背景情况:
- 细菌表面的多糖对细胞结构和相互作用至关重要.
- 糖转移酶 (GTs) 合成这些多糖,但一些细菌多糖聚合酶 (BP-Pols) 没有被分类.
- 这些酶利用二脂激活糖,这是一个独特的特征.
研究的目的:
- 将多种细菌多糖聚合酶 (BP-Pols) 分类为不同的家族.
- 将碳水化合物活性酶 (CAZy) 数据库扩展到新的GT家族.
- 为了研究这些新定义的酶家族中的保存特征.
主要方法:
- 开发了一种新的集群方法,结合了序列相似性网络和隐藏的马尔科夫模型比较.
- 分析了细菌多糖聚合酶 (BP-Pols) 和其他糖转移酶 (GTs) 的序列.
- 在定义的家族和族群中比较反应立体化学和糖转移特异性.
主要成果:
- 定义了17个新的甘氨基转移酶 (GT) 家族,其中14个专门用于细菌聚糖胺聚合酶 (BP-Pols).
- 在每一个新的BP-Pol家族中确定了保守的反应立体化学.
- 观察到保存的糖转移,甚至在家族内的格拉姆阴性和格拉姆阳性细菌之间.
- 发现了三个与远距离相关的GT家族家族家族,也保留了立体化学.
结论:
- 新的分类为了解细菌多糖合成提供了一个框架.
- 保存的立体化学和糖转移突出了BP-Pols之间的进化关系.
- 这项工作显著增强了CAZy数据库中糖转移酶的注释.
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