Recent ado about FoldIT success for prediction of the structure of monomeric retroviral protease (PDB ID: 3HVP) stack me into the question: We didn't solve the structures of proteases of the most common viruses yet? I can't believe my eyes...so I begin small investigation.
1. Let's take a look at the seqeunce similarity of the solved monomeric retroviral protease - 3HVP
2. Does it have homologs? Of course! Seq.Similarity list 395 structures in the PDB with sequence similarity 95%.
3. I have randomly took the 2HS1 structure for protein superposition. RMSD of the Calpha-atoms alignment is 1.6 Angstrom. 2HS1 Structure is published in 2006 (the most old between them is 1989).
4. So the question arised - why authors can't model the protein by homology modeling, molecular dynamics optimization, etc. There is a lot of thechniques exist to model structure based on bad NMR data. So, the gamers from Foldit solved the problem better than the authors do later the same year. Seems very strange for me...