The CATH hierarchy revisited-structural divergence in domain superfamilies and the continuity of fold space.

ABSTRACT: This paper explores the structural continuum in CATH and the extent to which superfamilies adopt distinct folds. Although most superfamilies are structurally conserved, in some of the most highly populated superfamilies (4% of all superfamilies) there is considerable structural divergence. While relatives share a similar fold in the evolutionary conserved core, diverse elaborations to this core can result in significant differences in the global structures. Applying similar protocols to examine the extent to which structural overlaps occur between different fold groups, it appears this effect is confined to just a few architectures and is largely due to small, recurring super-secondary motifs (e.g., alphabeta-motifs, alpha-hairpins). Although 24% of superfamilies overlap with superfamilies

SUBMITTER: Cuff A 

PROVIDER: S-EPMC2741583 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature