Comparative analysis of protein unfoldedness in human housekeeping and non-housekeeping proteins

Pandey, Neeraj and Ganapathi, Mythily and Kumar, Kaushal and Dasgupta, Dipayan and Sutar, Sushanta Kumar Das and Dash, Debasis (2004) Comparative analysis of protein unfoldedness in human housekeeping and non-housekeeping proteins. Comparative analysis of protein unfoldedness in human housekeeping and non-housekeeping proteins, 20 (17). pp. 2904-2910.

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Abstract

Absence of any regular structure is increasingly being observed in structural studies of proteins. These dis- ordered regions or random coils, which have been observed under physiological conditions, are indicators of protein plas- ticity. The wide variety of interactions possible due to the flexibility of these ‘natively disordered’ regions confers func- tional advantage to the protein and the organism in general. This concept is underscored by the increasing proportion of intrinsically unstructured proteins seen with the ascension in the complexity of the organisms. The ‘natively unfolded/disordered’ state of the protein can be predicted utilizing Uversky’s or Dunker’s algorithm. We utilized Uversky’s prediction scheme and based on the unique position of a protein in the charge–hydrophobicity plot, a derived net score was used to predict the overall disorder of the human housekeeping and non-housekeeping proteins. Substantial numbers of proteins in both the classes were predicted to be unfolded. However, comparative genomic analysis of pre- dicted unfolded Homo sapiens proteins with homologues in Caenorhabditis elegans, Drosophila melanogaster and Mus musculus revealed significant increase in unfoldedness in non-housekeeping proteins in comparison with housekeep- ing proteins. Our analysis in the evolutionary context sug- gests addition or substitution of amino acid residues which favour unfoldedness in non-housekeeping proteins compared to housekeeping proteins.

Item Type: Article
Subjects: BI Bioinformatics > BI1 Bioinformatics (General)
Divisions: Faculty of Genomics and Molecular Medicine > School of Genomics and Molecular Medicine
Depositing User: Raghu MV
Date Deposited: 11 Jan 2012 11:38
Last Modified: 11 Jan 2012 11:38
URI: http://openaccess.igib.res.in/id/eprint/115

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