Bacterial discrimination by Dictyostelid amoebae reveals the complexity of ancient interspecies interactions
Nasser, Waleed (Author), Santhanam, Balaji (Author), Miranda, Edward Roshan (Author), Parikh, Anup (Author), Juneja, Kavina (Author), Rot, Gregor (Author), Dinh, Christopher (Author), Chen, Rui (Author), Zupan, Blaž (Author), Shaulsky, Gad (Author), Kuspa, Adam (Author)

URLURL - Presentation file, Visit http://eprints.fri.uni-lj.si/2261/ This link opens in a new window

Background Amoebae and bacteria interact within predator-prey and host-pathogen relationships, but the general response of amoeba to bacteria is not well understood. The amoeba Dictyostelium discoideum feeds on, and is colonized by, diverse bacterial species, including Gram-positive [Gram(+)] and Gram-negative [Gram(–)] bacteria, two major groups of bacteria that differ in structure and macromolecular composition. Results Transcriptional profiling of D. discoideum revealed sets of genes whose expression is enriched in amoebae interacting with different species of bacteria, including sets that appear specific to amoebae interacting with Gram(+) or with Gram(–) bacteria. In a genetic screen utilizing the growth of mutant amoebae on a variety of bacteria as a phenotypic readout, we identified amoebal genes that are only required for growth on Gram(+) bacteria, including one that encodes the cell-surface protein gp130, as well as several genes that are only required for growth on Gram(–) bacteria, including one that encodes a putative lysozyme, AlyL. These genes are required for parts of the transcriptional response of wild-type amoebae, and this allowed their classification into potential response pathways. Conclusions We have defined genes that are critical for amoebal survival during feeding on Gram(+), or Gram(–), bacteria that we propose form part of a regulatory network that allows D. discoideum to elicit specific cellular responses to different species of bacteria in order to optimize survival.

Keywords:socialna ameba, bakterije, prepoznavanje bakterij, bioinformatika
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FRI - Faculty of computer and information science
Number of pages:str. 862-872
Numbering:Vol. 23, no. 10
ISSN on article:0960-9822
DOI:10.1016/j.cub.2013.04.034 Link is opened in a new window
COBISS.SI-ID:9921108 Link is opened in a new window
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Record is a part of a journal

Title:Current biology
Shortened title:Curr. biol.
Publisher:Elsevier Current Trends Journals
COBISS.SI-ID:165081 This link opens in a new window

Secondary language

Keywords:social amoeba, bacteria, bacterial recognition, bioinformatics

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