PconsC3 predicted residue contacts in proteins by combining coevolution methods with machine learning, which made accurate predictions possible for families with few sequences.
The web server code remains available on GitHub: ElofssonLab/web_pconsc3.
Reference: Michel M, Skwark MJ, Menéndez Hurtado D, Ekeberg M, Elofsson A. Predicting accurate contacts in thousands of Pfam domain families using PconsC3. Bioinformatics 33:2859–2866 (2017). doi:10.1093/bioinformatics/btx332
Predicted structures for Pfam families: PconsFam.