TargetDB performs this type of analysis for structures deposited by structural genomics projects. 
Tabulations of novel depositions can be found at 
http://targetdb.pdb.org/Metrics/MilestonesTables.html.     

The data from which these statistics were calculated from sequence clustering performed by the RCSB PDB.  Sequence clustering is updated weekly at ftp://resources.rcsb.org/sequence/clusters/.

Archived, time-stamped files containing sequence clustering data from the weekly update from 2007 - 2009 are available from
ftp://snapshots.rcsb.org/20090105/pub/pdb/derived_data/NR/blastclust/archive/.  

Best,

Christine
RCSB Protein Data Bank

-------- Original Message --------
Subject:
[ccp4bb] Where to find "novelty" of PDBids?
Date:
Wed, 9 Jun 2010 09:52:46 +0100
From:
Frank von Delft <[log in to unmask]>
Reply-To:
Frank von Delft <[log in to unmask]>
To:


Hi, for an analysis I need the sequence identity of any PDBid to its 
closest match in the PDB *at the time it was deposited*.

It seems like something somebody would have done before;  any thoughts 
where to find it?

Cheers
phx