首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >Classification of protein functional surfaces using structural characteristics
【2h】

Classification of protein functional surfaces using structural characteristics

机译:使用结构特征对蛋白质功能表面进行分类

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Protein structure and function are closely related, especially in functional surfaces, which are local spatial regions that perform the biological functions. Also, protein structures tend to evolve more slowly than amino acid sequences. We have therefore developed a method to classify proteins using the structures of functional surfaces; we call it protein surface classification (PSC). PSC may reflect functional relationships among proteins and may detect evolutionary relationships among highly divergent sequences. We focused on the surfaces of ligand-bound regions because they represent well-defined structures. Specifically, we used structural attributes to measure similarities between binding surfaces and constructed a PSC library of ∼2,000 binding surface types from the bound forms. Using flavin mononucleotide-binding proteins and glycosidases as examples, we show how the evolutionary position of an uncharacterized protein can be defined and its function inferred from the characterized members of the same surface subtype. We found that proteins with the same enzyme nomenclature may be divided into subtypes and that two proteins in the same CATH (Class, Architecture, Topology, Homologous superfamily) fold may belong to two different surface types. In conclusion, our approach complements the sequence-based and fold–domain classifications and has the advantage of associating the shape of a protein with its biological function. As an expandable library, PSC provides a resource of spatial patterns for studying the evolution of protein structure and function.
机译:蛋白质的结构和功能密切相关,特别是在功能表面上,它们是执行生物学功能的局部空间区域。同样,蛋白质结构比氨基酸序列趋向于更缓慢地进化。因此,我们开发了一种使用功能表面结构对蛋白质进行分类的方法。我们称之为蛋白质表面分类(PSC)。 PSC可能反映蛋白质之间的功能关系,并可能检测高度不同的序列之间的进化关系。我们专注于配体结合区域的表面,因为它们代表定义明确的结构。具体来说,我们使用结构属性来测量结合表面之间的相似性,并从结合形式构建了约2,000个结合表面类型的PSC库。以黄素单核苷酸结合蛋白和糖苷酶为例,我们展示了如何确定未表征蛋白的进化位置,并从相同表面亚型的特征成员推断其功能。我们发现具有相同酶命名法的蛋白质可分为亚型,并且同一CATH(类别,结构,拓扑,同源超家族)折叠中的两种蛋白质可能属于两种不同的表面类型。总之,我们的方法补充了基于序列和折叠域的分类,并具有将蛋白质的形状与其生物学功能相关联的优势。作为一个可扩展的文库,PSC提供了一种空间模式资源,用于研究蛋白质结构和功能的进化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号