PseqIP: A nonredundant and exhaustive protein sequence data bank generated from 4 major existing collections

Four major protein sequence data collections (NBRF‐PIR, PSD‐Kyoto, PGtrans, and NEWAT) have been merged into a single nonredundant data bank called PseqIP. The data bank entries were automatically matched by a heuristic computer program relying on the fast computation of the number of tetrapeptides shared by two sequences. PseqIP 1.0 includes 6,068 different protein sequences for a total of 1,357,067 residues, representing most of the available sequence information to date. During the course of this work, we found about 600 occurrences course of a protein sequence recorded with a one‐amino‐acid variation in at least two different data banks. A flat file (ASCII computer‐readable format) version of PseqIP 1.0, well‐suited for exhaustive homology searches and statistical sequence analysis, is available from our laboratory.