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10.1371/journal.pcbi.1005398

http://scihub22266oqcxt.onion/10.1371/journal.pcbi.1005398
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C5330503!5330503!28192432
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suck abstract from ncbi


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pmid28192432      PLoS+Comput+Biol 2017 ; 13 (2): ä
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  • Conformational diversity analysis reveals three functional mechanisms in proteins #MMPMID28192432
  • Monzon AM; Zea DJ; Fornasari MS; Saldaño TE; Fernandez-Alberti S; Tosatto SCE; Parisi G
  • PLoS Comput Biol 2017[Feb]; 13 (2): ä PMID28192432show ga
  • Protein motions are a key feature to understand biological function. Recently, a large-scale analysis of protein conformational diversity showed a positively skewed distribution with a peak at 0.5 Å C-alpha root-mean-square-deviation (RMSD). To understand this distribution in terms of structure-function relationships, we studied a well curated and large dataset of ~5,000 proteins with experimentally determined conformational diversity. We searched for global behaviour patterns studying how structure-based features change among the available conformer population for each protein. This procedure allowed us to describe the RMSD distribution in terms of three main protein classes sharing given properties. The largest of these protein subsets (~60%), which we call ?rigid? (average RMSD = 0.83 Å), has no disordered regions, shows low conformational diversity, the largest tunnels and smaller and buried cavities. The two additional subsets contain disordered regions, but with differential sequence composition and behaviour. Partially disordered proteins have on average 67% of their conformers with disordered regions, average RMSD = 1.1 Å, the highest number of hinges and the longest disordered regions. In contrast, malleable proteins have on average only 25% of disordered conformers and average RMSD = 1.3 Å, flexible cavities affected in size by the presence of disordered regions and show the highest diversity of cognate ligands. Proteins in each set are mostly non-homologous to each other, share no given fold class, nor functional similarity but do share features derived from their conformer population. These shared features could represent conformational mechanisms related with biological functions.
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