Characterisation of a large family of polymorphic collagen-like proteins in the endospore-forming bacterium Pasteuria ramosa

McElroy, Kerensa and Mouton, Laurence and Du Pasquier, Louis and Qi, Weihong and Ebert, Dieter . (2011) Characterisation of a large family of polymorphic collagen-like proteins in the endospore-forming bacterium Pasteuria ramosa. Research in Microbiology, 162 (7). pp. 701-714.

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Collagen-like proteins containing glycine-X-Y repeats have been identified in several pathogenic bacteria potentially involved in virulence. Recently, a collagen-like surface protein, Pcl1a, was identified in Pasteuria ramosa, a spore-forming parasite of Daphnia. Here we characterise 37 novel putative P. ramosa collagen-like protein genes (PCLs). PCR amplification and sequencing across 10 P. ramosa strains showed they were polymorphic, distinguishing genotypes matching known differences in Daphnia/P. ramosa interaction specificity. Thirty PCLs could be divided into four groups based on sequence similarity, conserved N- and C-terminal regions and G-X-Y repeat structure. Group 1, Group 2 and Group 3 PCLs formed triplets within the genome, with one member from each group represented in each triplet. Maximum-likelihood trees suggested that these groups arose through multiple instances of triplet duplication. For Group 1, 2, 3 and 4 PCLs, X was typically proline and Y typically threonine, consistent with other bacterial collagen-like proteins. The amino acid composition of Pcl2 closely resembled Pcl1a, with X typically being glutamic acid or aspartic acid and Y typically being lysine or glutamine. Pcl2 also showed sequence similarity to Pcl1a and contained a predicted signal peptide, cleavage site and transmembrane domain, suggesting that it is a surface protein.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Evolutionary Biology (Ebert)
UniBasel Contributors:Du Pasquier, Louis and Ebert, Dieter
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:02 Oct 2017 07:25
Deposited On:12 Jan 2017 11:20

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