From my understanding there are 2 types of methods for predicting protein structure from an amino acid sequence.
1) predicting structure from homology with other proteins which have been crystallized (template-based)
2) predicting structure from amino acid sequence only (template-free).
Is there any software which uses both methods? Also, what is the best software for either of the methods?
This recent article may be useful.
http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC5394799&blobtype=pdf
Critical Assessment of Methods of Protein Structure Prediction (CASP) – Progress and New directions in Round XI