PDB-REPRDB ( based on PDB Rel.#89 )
(Last updated: September 16,1999)

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	2478	1673	1617	1609
=< 50	2756	2262	2231	2223
=< 70	3099	2682	2655	2650
=< 90	3652	3321	3295	3293

This table and representative chains were last updated at: 16 September 1999