Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs
The basidiomycete smut fungi are predominantly plant parasitic, causing severe losses in some crops. Most species feature a saprotrophic haploid yeast stage, and several smut fungi are only known from this stage, with some isolated from habitats without suitable hosts, e.g. from Antarctica. Thus, th...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:15012 2023-05-15T13:36:41+02:00 Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs Sharma, Rahul Oekmen, Bilal Doehlemann, Gunther Thines, Marco 2019 https://kups.ub.uni-koeln.de/15012/ eng eng SPRINGER HEIDELBERG Sharma, Rahul, Oekmen, Bilal, Doehlemann, Gunther orcid:0000-0002-7353-8456 and Thines, Marco (2019). Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs. Mycol. Prog., 18 (5). S. 763 - 769. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1861-8952 ddc:no doc-type:article publishedVersion 2019 ftubkoeln 2022-11-09T07:14:52Z The basidiomycete smut fungi are predominantly plant parasitic, causing severe losses in some crops. Most species feature a saprotrophic haploid yeast stage, and several smut fungi are only known from this stage, with some isolated from habitats without suitable hosts, e.g. from Antarctica. Thus, these species are generally believed to be apathogenic, but recent findings that some of these might have a plant pathogenic teleomorph counterpart cast doubts on the validity of this hypothesis. Here, four genomes of species previously assigned to the polyphyletic genus Pseudozyma were re-annotated and compared with published smut pathogens. It was found that 113 genes coding for putative secreted effector proteins were conserved among smut-causing and Pseudozyma genomes. Among these were several validated effector genes, including Pep1. Orthologs of this well-characterised effector from Pseudozyma yeasts were further analysed and checked for their ability to complement a Pep1-deficient mutants of Ustilago maydis. By genetic complementation, we show that Pep1 homologs from the supposedly apathogenic yeasts restore virulence in Pep1-deficient mutants Ustilago maydis. Thus, it is concluded that Pseudozyma species have likely retained a suite of effectors, which hints at the possibility that Pseudozyma species have kept an unknown plant pathogenic stage for sexual recombination. However, it cannot be excluded that these effectors might also have positive effects also when colonising plant surfaces. Article in Journal/Newspaper Antarc* Antarctica Cologne University: KUPS |
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English |
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ddc:no Sharma, Rahul Oekmen, Bilal Doehlemann, Gunther Thines, Marco Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs |
topic_facet |
ddc:no |
description |
The basidiomycete smut fungi are predominantly plant parasitic, causing severe losses in some crops. Most species feature a saprotrophic haploid yeast stage, and several smut fungi are only known from this stage, with some isolated from habitats without suitable hosts, e.g. from Antarctica. Thus, these species are generally believed to be apathogenic, but recent findings that some of these might have a plant pathogenic teleomorph counterpart cast doubts on the validity of this hypothesis. Here, four genomes of species previously assigned to the polyphyletic genus Pseudozyma were re-annotated and compared with published smut pathogens. It was found that 113 genes coding for putative secreted effector proteins were conserved among smut-causing and Pseudozyma genomes. Among these were several validated effector genes, including Pep1. Orthologs of this well-characterised effector from Pseudozyma yeasts were further analysed and checked for their ability to complement a Pep1-deficient mutants of Ustilago maydis. By genetic complementation, we show that Pep1 homologs from the supposedly apathogenic yeasts restore virulence in Pep1-deficient mutants Ustilago maydis. Thus, it is concluded that Pseudozyma species have likely retained a suite of effectors, which hints at the possibility that Pseudozyma species have kept an unknown plant pathogenic stage for sexual recombination. However, it cannot be excluded that these effectors might also have positive effects also when colonising plant surfaces. |
format |
Article in Journal/Newspaper |
author |
Sharma, Rahul Oekmen, Bilal Doehlemann, Gunther Thines, Marco |
author_facet |
Sharma, Rahul Oekmen, Bilal Doehlemann, Gunther Thines, Marco |
author_sort |
Sharma, Rahul |
title |
Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs |
title_short |
Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs |
title_full |
Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs |
title_fullStr |
Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs |
title_full_unstemmed |
Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs |
title_sort |
saprotrophic yeasts formerly classified as pseudozyma have retained a large effector arsenal, including functional pep1 orthologs |
publisher |
SPRINGER HEIDELBERG |
publishDate |
2019 |
url |
https://kups.ub.uni-koeln.de/15012/ |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Sharma, Rahul, Oekmen, Bilal, Doehlemann, Gunther orcid:0000-0002-7353-8456 and Thines, Marco (2019). Saprotrophic yeasts formerly classified as Pseudozyma have retained a large effector arsenal, including functional Pep1 orthologs. Mycol. Prog., 18 (5). S. 763 - 769. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1861-8952 |
_version_ |
1766082388899659776 |