PDB-REPRDB ( based on PDB Rel.#2000_02_21 )
(Last updated: March 13,2000)

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	2782	1971	1910	1903
=< 50	3117	2660	2622	2614
=< 70	3530	3141	3109	3103
=< 90	4190	3870	3840	3837

This table and representative chains were last updated at: 13 March 2000