Crystal structure of NucB, a biofilm-degrading endonuclease.

Crystal structure of NucB, a biofilm-degrading endonuclease.
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DOI:
10.1093/nar/gkx1170
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发表时间:
2018-01-09
影响因子:
14.9
通讯作者:
Lewis RJ
Lewis RJ
中科院分区:
生物学2区
文献类型:
--
作者:
Baslé A;Hewitt L;Koh A;Lamb HK;Thompson P;Burgess JG;Hall MJ;Hawkins AR;Murray H;Lewis RJ

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细菌生物膜是生长在潮湿界面上的细胞的复杂结构,并且通过细胞外蛋白质、糖和核酸的分子胶保持在一起。生物膜在人类医疗保健中特别成问题,因为它们可以覆盖医疗植入物,因此是潜在的疾病来源。生物膜的酶促分散作为一种新的解决方法正日益得到发展。在这里,我们已经表征了NucB,一种来自地衣芽孢杆菌海洋菌株的生物膜分散核酸酶,并提出了其晶体结构以及确认其活性位点所需的生物化学和突变分析。总之,这些数据支持将NucB归类为ββα金属依赖性非特异性核酸内切酶的独特亚家族。了解NucB的结构和功能将有助于其未来发展成为抗生物膜治疗剂。
Bacterial biofilms are a complex architecture of cells that grow on moist interfaces, and are held together by a molecular glue of extracellular proteins, sugars and nucleic acids. Biofilms are particularly problematic in human healthcare as they can coat medical implants and are thus a potential source of disease. The enzymatic dispersal of biofilms is increasingly being developed as a new strategy to treat this problem. Here, we have characterized NucB, a biofilm-dispersing nuclease from a marine strain of Bacillus licheniformis, and present its crystal structure together with the biochemistry and a mutational analysis required to confirm its active site. Taken together, these data support the categorization of NucB into a unique subfamily of the ββα metal-dependent non-specific endonucleases. Understanding the structure and function of NucB will facilitate its future development into an anti-biofilm therapeutic agent.
DOI: 10.1107/s090744491003982x
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