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Functional distinctness in the exoproteomes of marine Synechococcus
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Christie-Oleza, Joseph Alexander, Armengaud, Jean, Guerin, Philippe and Scanlan, David J. (2015) Functional distinctness in the exoproteomes of marine Synechococcus. Environmental Microbiology, 17 (10). pp. 3781-3794. doi:10.1111/1462-2920.12822 ISSN 1462-2912.
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Official URL: http://dx.doi.org/10.1111/1462-2920.12822
Abstract
The exported protein fraction of an organism may reflect its life strategy and, ultimately, the way it is perceived by the outside world. Bioinformatic prediction of the exported pan-proteome of Prochlorococcus and Synechococcus lineages demonstrated that (i) this fraction of the encoded proteome had a much higher incidence of lineage-specific proteins than the cytosolic fraction (57% and 73% homologue incidence respectively) and (ii) exported proteins are largely uncharacterized to date (54%) compared with proteins from the cytosolic fraction (35%). This suggests that the genomic and functional diversity of these organisms lies largely in the diverse pool of novel functions these organisms export to/through their membranes playing a key role in community diversification, e.g. for niche partitioning or evading predation. Experimental exoproteome analysis of marine Synechococcus showed transport systems for inorganic nutrients, an interesting array of strain-specific exoproteins involved in mutualistic or hostile interactions (i.e. hemolysins, pilins, adhesins), and exoenzymes with a potential mixotrophic goal (i.e. exoproteases and chitinases). We also show how these organisms can remodel their exoproteome, i.e. by increasing the repertoire of interaction proteins when grown in the presence of a heterotroph or decrease exposure to prey when grown in the dark. Finally, our data indicate that heterotrophic bacteria can feed on the exoproteome of Synechococcus.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QR Microbiology | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||||||
Library of Congress Subject Headings (LCSH): | Cyanobacteria -- Molecular aspects | ||||||||||||
Journal or Publication Title: | Environmental Microbiology | ||||||||||||
Publisher: | Blackwell | ||||||||||||
ISSN: | 1462-2912 | ||||||||||||
Official Date: | 22 October 2015 | ||||||||||||
Dates: |
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Volume: | 17 | ||||||||||||
Number: | 10 | ||||||||||||
Page Range: | pp. 3781-3794 | ||||||||||||
DOI: | 10.1111/1462-2920.12822 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
Date of first compliant deposit: | 29 December 2015 | ||||||||||||
Date of first compliant Open Access: | 29 December 2015 | ||||||||||||
Funder: | Seventh Framework Programme (European Commission) (FP7), Natural Environment Research Council (Great Britain) (NERC), France. Commissariat à l'énergie atomique (CEA) | ||||||||||||
Grant number: | PIEF-GA-2010-272593 (FP7), NE/K009044/1 (NERC) | ||||||||||||
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