Abstract：
:Despite efforts during the past decades, loop modeling remains a difficult part of protein structure modeling. Several approaches have been developed in the framework of crystal structures. However, for homology models, the modeling of loops is still far from being solved. We propose DaReUS-Loop, a data-based approach that identifies loop candidates mining the complete set of experimental structures available in the Protein Data Bank. Candidate filtering relies on local conformation profile-profile comparison, together with physico-chemical scoring. Applied to three different template-based test sets, DaReUS-Loop shows significant increase in the number of high-accuracy loops, and significant enhancement for modeling long loops. A special advantage is that our method proposes a prediction confidence score that correlates well with the expected accuracy of the loops. Strikingly, over 50% of successful loop models are derived from unrelated proteins, indicating that fragments under similar constraints tend to adopt similar structure, beyond mere homology.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Karami Y,Guyon F,De Vries S,Tufféry Pdoi
10.1038/s41598-018-32079-wsubject
Has Abstractpub_date
2018-09-12 00:00:00pages
13673issue
1issn
2045-2322pii
10.1038/s41598-018-32079-wjournal_volume
8pub_type
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