PDB-REPRDB ( based on PDB Rel.#2009_05_08 )
(Last updated: October 28,2009)

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	17607	10504	9845	9757
=< 50	19984	16338	16016	15950
=< 70	22230	19188	18897	18844
=< 90	26020	23466	23221	23176

This table and representative chains were last updated at: 28 October 2009