Structure Prediction of Domain Insertion Proteins from Structures of Individual Domains

Monica Berrondo, Marc Ostermeier, Jeffrey J. Gray

Research output: Contribution to journalArticle

Abstract

Multidomain proteins continue to be a major challenge in protein structure prediction. Here we present a Monte Carlo (MC) algorithm, implemented within Rosetta, to predict the structure of proteins in which one domain is inserted into another. Three MC moves combine rigid-body and loop movements to search the constrained conformation by structure disruption and subsequent repair of chain breaks. Local searches find that the algorithm samples and recovers near-native structures consistently. Further global searches produced top-ranked structures within 5 Å in 31 of 50 cases in low-resolution mode, and refinement of top-ranked low-resolution structures produced models within 2 Å in 21 of 50 cases. Rigid-body orientations were often correctly recovered despite errors in linker conformation. The algorithm is broadly applicable to de novo structure prediction of both naturally occurring and engineered domain insertion proteins.

Original languageEnglish (US)
Pages (from-to)513-527
Number of pages15
JournalStructure
Volume16
Issue number4
DOIs
StatePublished - Apr 8 2008

Keywords

  • PROTEINS

ASJC Scopus subject areas

  • Structural Biology
  • Molecular Biology

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