TopScore predicts the structural similarity between a protein model and the
native structure by combining model quality predictions from 15 different
primary predictors using a two-stage deep neural network. TopScore was
validated on over 780 different protein targets totaling ~1.5x105 models
and ~2.3x107 residues.
These models originated from diverse sources including homology models
for different difficulties, ab-initio folded models, CASP models and
models from different decoy data-sets. TopScore has a significantly better
and more robust performance than any of its primary predictors. TopScore
provides both a global and a residue-wise measure of the error in the
TopModel performs template-based structure prediction using top-down
consensus and deep neural networks. The input sequence is submitted to 12
primary servers for template identification. TopModel then uses a series of
deep neural networks to combine primary threader scores and model quality
scores from TopScore to predict the template quality in terms of TM-Score
to the native structure. TopModel is much more sensitive at detecting
distantly related templates than any of its primary predictors even when
the target has no truly homologous structure.
Following template identification, TopModel generates a large ensemble of
different alignments for different combinations of the top ranked templates
using 18 different primary alignment programs. Models built from this
large alignment ensemble are then scored with TopScore.
After constructing multi-template models, TopModel selects the best
scoring single-template and multi-template models, and combines them into a
single refined model. This is done by deleting regions in the models
predicted by TopScore that contain errors and re-combining the remaining
parts into a final refined model.