PMID- 20013221 OWN - NLM STAT- MEDLINE DCOM- 20100222 LR - 20091216 IS - 1940-6029 (Electronic) IS - 1064-3745 (Linking) VI - 615 DP - 2010 TI - Bioinformatic identification of plant peptides. PG - 375-83 LID - 10.1007/978-1-60761-535-4_26 [doi] AB - Plant peptides play a number of important roles in defence, development and many other aspects of plant physiology. Identifying additional peptide sequences provides the starting point to investigate their function using molecular, genetic or biochemical techniques. Due to their small size, identifying peptide sequences may not succeed using the default bioinformatic approaches that work well for average-sized proteins. There are two general scenarios related to bioinformatic identification of peptides to be discussed in this paper. In the first scenario, one already has the sequence of a plant peptide and is trying to find more plant peptides with some sequence similarity to the starting peptide. To do this, the Basic Local Alignment Search Tool (BLAST) is employed, with the parameters adjusted to be more favourable for identifying potential peptide matches. A second scenario involves trying to identify plant peptides without using sequence similarity searches to known plant peptides. In this approach, features such as protein size and the presence of a cleavable amino-terminal signal peptide are used to screen annotated proteins. A variation of this method can be used to screen for unannotated peptides from genomic sequences. Bioinformatic resources related to Arabidopsis thaliana will be used to illustrate these approaches. FAU - Lease, Kevin A AU - Lease KA AD - Division of Biological Sciences and Bond Life Sciences Centre, University of Missouri, Columbia, MO, USA. FAU - Walker, John C AU - Walker JC LA - eng PT - Journal Article PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (Arabidopsis Proteins) RN - 0 (Peptides) SB - IM MH - Amino Acid Sequence MH - *Arabidopsis/chemistry/genetics MH - Arabidopsis Proteins/chemistry/*genetics MH - Computational Biology/*methods MH - Databases, Protein MH - Molecular Sequence Data MH - Peptides/chemistry/*genetics MH - Sequence Analysis, Protein MH - Sequence Homology, Amino Acid EDAT- 2009/12/17 06:00 MHDA- 2010/02/23 06:00 CRDT- 2009/12/17 06:00 PHST- 2009/12/17 06:00 [entrez] PHST- 2009/12/17 06:00 [pubmed] PHST- 2010/02/23 06:00 [medline] AID - 10.1007/978-1-60761-535-4_26 [doi] PST - ppublish SO - Methods Mol Biol. 2010;615:375-83. doi: 10.1007/978-1-60761-535-4_26.