CSIR Central

Intrinsic Unstructuredness and Abundance of PEST Motifs in Eukaryotic Proteomes

IR@IGIB: CSIR-Institute of Genomics & Integrative Biology, New Delhi

View Archive Info
 
 
Field Value
 
Title Intrinsic Unstructuredness and Abundance of PEST Motifs in Eukaryotic Proteomes
 
Creator Singh , Gajinder Pal
Ganapathi, Mythily
Sandhu, Kuljeet Singh
Dash, Debasis
 
Subject BI1 Bioinformatics (General)
 
Description The study of unfolded protein regions has gained importance because of their prevalence and important roles in various cellular functions. These regions have characteristically high net charge and low hydrophobicity. The amino acid sequence determines the intrinsic unstructuredness of a region and, therefore, efforts are ongoing to delineate the sequence motifs, which might contribute to protein disorder. We find that PEST motifs are enriched in the characterized disordered regions as compared with globular ones. Analysis of representative PDB chains revealed very few structures containing PEST sequences and the majority of them lacked regular secondary structure. A proteome-wide study in completely sequenced eukaryotes with predicted unfolded and folded proteins shows that PEST proteins make up a large fraction of unfolded dataset as compared with the folded proteins. Our data also reveal the prevalence of PEST proteins in eukaryotic proteomes (approximately 25%). Functional classification of the PEST-containing proteins shows an over- and under-representation in proteins involved in regulation and metabolism, respectively. Furthermore, our analysis shows that predicted PEST regions do not exhibit any preference to be localized in the C terminals of proteins, as reported earlier.
 
Date 2006-02-01
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://openaccess.igib.res.in/120/1/Intrinsic%20Unstructuredness%20and%20Abundance%20of%20PEST%20Motifs.pdf
Singh , Gajinder Pal and Ganapathi, Mythily and Sandhu, Kuljeet Singh and Dash, Debasis (2006) Intrinsic Unstructuredness and Abundance of PEST Motifs in Eukaryotic Proteomes. Intrinsic Unstructuredness and Abundance of PEST Motifs in Eukaryotic Proteomes, 62 (2). pp. 309-315.
 
Relation http://openaccess.igib.res.in/120/