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Protein Sci. 1999 May;8(5):978-84.

ChloroP, a neural network-based method for predicting chloroplast transit peptides and their cleavage sites.

Author information

1
Department of Biochemistry, Stockholm University, Sweden.

Abstract

We present a neural network based method (ChloroP) for identifying chloroplast transit peptides and their cleavage sites. Using cross-validation, 88% of the sequences in our homology reduced training set were correctly classified as transit peptides or nontransit peptides. This performance level is well above that of the publicly available chloroplast localization predictor PSORT. Cleavage sites are predicted using a scoring matrix derived by an automatic motif-finding algorithm. Approximately 60% of the known cleavage sites in our sequence collection were predicted to within +/-2 residues from the cleavage sites given in SWISS-PROT. An analysis of 715 Arabidopsis thaliana sequences from SWISS-PROT suggests that the ChloroP method should be useful for the identification of putative transit peptides in genome-wide sequence data. The ChloroP predictor is available as a web-server at http://www.cbs.dtu.dk/services/ChloroP/.

PMID:
10338008
PMCID:
PMC2144330
DOI:
10.1110/ps.8.5.978
[Indexed for MEDLINE]
Free PMC Article

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