PDB-REPRDB ( based on PDB Rel.#2010_05_14 )
(Last updated: January 5,2011)

A Database of Representative Protein Chains from PDB (Protein Data Bank)

(see the document.)

Since 01/Apr/98

PDB-REPRDB Selection Criterion

Constraints to eliminate and arrange chains are here.
Each representative is different from all other representatives in terms of either
a ) Sequence similarity (ID% =< threshold1)

ID%:
Percentage of identical amino-acid residues between corresponding residue pairs in the two compared sequences.
OR
b ) 3-dimensional structures similarity (Dmax >= threshold2)

Dmax:
Maximum 'Ca'-distance between the corresponding residue pairs in the two compared structures.

Threshold sequence identity ID%	Number of chains
	Dmax (A)
	>= 10	>= 30	>= 50	infinity
=< 30	19959	11780	11035	10919
=< 50	22664	18466	18074	17994
=< 70	25283	21769	21420	21342
=< 90	29685	26719	26425	26366

This table and representative chains were last updated at: 5 January 2011