Hi Joe - we have a few papers in this
area, the 2009 JCIM one is probably a good place to start:
Tautomer Preference in PDB Complexes and its Impact on Structure-Based Drug
Discovery
Francesca Milletti and Anna Vulpetti
J. Chem. Inf. Model., 2010, 50 (6), pp
1062–1074
Milletti F, Storchi L,
Sforna G, Cruciani G. New and original pKa prediction method using grid
molecular interaction fields. J Chem Inf Model. 2007
Nov-Dec;47(6):2172-81.
Milletti F,
Storchi L, Sforna G, Cross S, Cruciani G. Tautomer enumeration and
stability prediction for virtual screening on large chemical databases. J
Chem Inf Model. 2009 Jan;49(1):68-75.
Manchester J, Walkup G,
Rivin O, You Z. Evaluation of pKa estimation methods on 211 druglike
compounds. J Chem Inf Model. 2010 Apr 26;50(4):565-71.
Milletti F, Storchi L, Cruciani G. Predicting protein pK(a) by
environment similarity. Proteins. 2009 Aug 1;76(2):484-95.
Cruciani G, Milletti F,
Storchi L, Sforna G, Goracci L. In silico pKa prediction and ADME
profiling. Chem Biodivers. 2009 Nov;6(11):1812-21.
Cheers,
Simon