PolyPhen databases statistics:

HS_SWALL (all human proteins from SWALL) 

Jan 24 2002 18:27:42 MEST
44,111 human proteins
PQS (Protein Quaternary Structure) 
Jan 18 2002 21:15:01 MEST
43,284 sequences from 16,721 structures
PDB (Protein Data Bank) 
Mar 29 2002 11:48:00 MEST 
31,988 sequences from 15,969 structures