Bacteria may induce the secretion of mucin-like proteins by the diatom Phaeodactylum tricornutum
Autor: | David Schleheck, Birgit Schulze, Alexander Förderer, Matthias T. Buhmann, Peter G. Kroth |
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Rok vydání: | 2016 |
Předmět: |
Diatoms
0301 basic medicine biology Algal Proteins fungi Mucins Biofilm Computational Biology Plant Science Aquatic Science Roseobacter biology.organism_classification Microbiology 03 medical and health sciences 030104 developmental biology Extracellular polymeric substance Biochemistry ddc:570 Proteome Extracellular Secretion Phaeodactylum tricornutum Bacteria |
Zdroj: | Journal of Phycology. 52:463-474 |
ISSN: | 0022-3646 |
Popis: | Benthic diatoms live in photoautotrophic/heterotrophic biofilm communities embedded in a matrix of secreted extracellular polymeric substances. Closely associated bacteria influence their growth, aggregation, and secretion of exopolymers. We have studied a diatom/bacteria model community, in which a marine Roseobacter strain is able to grow with secreted diatom exopolymers as sole source of carbon. The strain influences the aggregation of Phaeodactylum tricornutum by inducing a morphotypic transition from planktonic, fusiform cells to benthic, oval cells. Analysis of the extracellular soluble proteome of P. tricornutum in the presence and absence of bacteria revealed constitutively expressed newly identified proteins with mucin-like domains that appear to be typical for extracellular diatom proteins. In contrast to mucins, the proline-, serine-, threonine-rich (PST) domains in these proteins were also found in combination with protease-, glucosidase and leucine-rich repeat (LRR-) domains. Bioinformatic functional predictions indicate that several of these newly identified diatom-specific proteins may be involved in algal defense, intercellular signaling, and aggregation This article is protected by copyright. All rights reserved. published |
Databáze: | OpenAIRE |
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