Protein aggregation profile of the bacterial cytosol

Natalia S. De Groot, Salvador Ventura

Research output: Contribution to journalArticleResearchpeer-review

45 Citations (Scopus)

Abstract

Background: Protein misfolding is usually deleterious for the cell, either as a consequence of the loss of protein function or the buildup of insoluble and toxic aggregates. The aggregation behavior of a given polypeptide is strongly influenced by the intrinsic properties encoded in its sequence. This has allowed the development of effective computational methods to predict protein aggregation propensity. Methodology/Principal Findings: Here, we use the AGGRESCAN algorithm to approximate the aggregation profile of an experimental cytosolic Escherichia coli proteome. The analysis indicates that the aggregation propensity of bacterial proteins is associated with their length, conformation, location, function, and abundance. The data are consistent with the predictions of other algorithms on different theoretical proteomes. Conclusions/ Significance: Overall, the study suggests that the avoidance of protein aggregation in functional environments acts as a strong evolutionary constraint on polypeptide sequences in both prokaryotic and eukaryotic organisms. © 2010 de Groot, Ventura.
Original languageEnglish
Article numbere9383
JournalPLoS ONE
Volume5
DOIs
Publication statusPublished - 25 Feb 2010

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