Proteome analysis of the UVB-resistant marine bacterium Photobacterium angustum S14

Citation

Matallana-Surget S, Joux F, Wattiez R & Lebaron P (2012) Proteome analysis of the UVB-resistant marine bacterium Photobacterium angustum S14. PLoS ONE, 7 (8), Art. No.: e42299. https://doi.org/10.1371/journal.pone.0042299

Abstract
The proteome of the marine bacterium Photobacterium angustum S14 was exposed to UVB and analyzed by the implementation of both the post-digest ICPL labeling method and 2D-DIGE technique using exponentially growing cells. A total of 40 and 23 proteins were quantified in all replicates using either the ICPL or 2D-DIGE methods, respectively. By combining both datasets from 8 biological replicates (4 biological replicates for each proteomics technique), 55 proteins were found to respond significantly to UVB radiation in P. angustum. A total of 8 UVB biomarkers of P. angustum were quantified in all replicates using both methods. Among them, the protein found to present the highest increase in abundance (almost a 3-fold change) was RecA, which is known to play a crucial role in the so-called recombinational repair process. We also observed a high number of antioxidants, transport proteins, metabolism-related proteins, transcription/translation regulators, chaperonins and proteases. We also discuss and compare the UVB response and global protein expression profiles obtained for two different marine bacteria with trophic lifestyles: the copiotroph P. angustum and oligotroph Sphingopyxis alaskensis.

Journal
PLoS ONE: Volume 7, Issue 8