Xylose donor transport is critical for fungal virulence
Publication Date
January 18, 2018
Authors
Lucy X. Li, Carsten Rautengarten, Joshua L. Heazlewood & Tamara L. Doering
Volume
14
Issue
1
Pages
e1006765
DOI
https://dx.plos.org/10.1371/journal.ppat.1006765
Publisher URL
http://journals.plos.org/plospathogens/article?id=10.1371%2Fjournal.ppat.1006765
Scopus
85041515522
Mendeley
http://www.mendeley.com/research/xylose-donor-transport-critical-fungal-virulence
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{"title"=>"Xylose donor transport is critical for fungal virulence", "type"=>"journal", "authors"=>[{"first_name"=>"Lucy X.", "last_name"=>"Li", "scopus_author_id"=>"57189100202"}, {"first_name"=>"Carsten", "last_name"=>"Rautengarten", "scopus_author_id"=>"15056526500"}, {"first_name"=>"Joshua L.", "last_name"=>"Heazlewood", "scopus_author_id"=>"6602098757"}, {"first_name"=>"Tamara L.", "last_name"=>"Doering", "scopus_author_id"=>"7006620598"}], "year"=>2018, "source"=>"PLoS Pathogens", "identifiers"=>{"issn"=>"15537374", "pui"=>"620571760", "doi"=>"10.1371/journal.ppat.1006765", "sgr"=>"85041515522", "isbn"=>"1111111111", "pmid"=>"29346417", "scopus"=>"2-s2.0-85041515522"}, "id"=>"98960b77-537b-3f58-aff2-25fa6641e5e5", "abstract"=>"Cryptococcus neoformans, an AIDS-defining opportunistic pathogen, is the leading cause of fungal meningitis worldwide and is responsible for hundreds of thousands of deaths annually. Cryptococcal glycans are required for fungal survival in the host and for pathogenesis. Most glycans are made in the secretory pathway, although the activated precursors for their synthesis, nucleotide sugars, are made primarily in the cytosol. Nucleotide sugar transporters are membrane proteins that solve this topological problem, by exchanging nucleotide sugars for the corresponding nucleoside phosphates. The major virulence factor of C. neoformans is an anti-phagocytic polysaccharide capsule that is displayed on the cell surface; capsule polysaccharides are also shed from the cell and impede the host immune response. Xylose, a neutral monosaccharide that is absent from model yeast, is a significant capsule component. Here we show that Uxt1 and Uxt2 are both transporters specific for the xylose donor, UDP-xylose, although they exhibit distinct subcellular localization, expression patterns, and kinetic parameters. Both proteins also transport the galactofuranose donor, UDP-galactofuranose. We further show that Uxt1 and Uxt2 are required for xylose incorporation into capsule and protein; they are also necessary for C. neoformans to cause disease in mice, although surprisingly not for fungal viability in the context of infection. These findings provide a starting point for deciphering the substrate specificity of an important class of transporters, elucidate a synthetic pathway that may be productively targeted for therapy, and contribute to our understanding of fundamental glycobiology.", "link"=>"http://www.mendeley.com/research/xylose-donor-transport-critical-fungal-virulence", "reader_count"=>5, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>1, "Researcher"=>1, "Student > Doctoral Student"=>1, "Student > Master"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>1, "Researcher"=>1, "Student > Doctoral Student"=>1, "Student > Master"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>1, "Agricultural and Biological Sciences"=>4}, "reader_count_by_subdiscipline"=>{"Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>4}, "Unspecified"=>{"Unspecified"=>1}}, "group_count"=>0}

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