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New insights into HcPTR2A and HcPTR2B, two high-affinity peptide transporters from the ectomycorrhizal model fungus Hebeloma cylindrosporum

Abstract : While plants mainly rely on the use of inorganic nitrogen sources like ammonium and nitrate, soil-borne microorganisms like the ectomycorrhizal fungus Hebeloma cylindrosporum can also take up soil organic N in the form of amino acids and peptides that they use as nitrogen and carbon sources. Following the previous identification and functional expression in yeast of two PTR-like peptide transporters, the present study details the functions and substrates of HcPTR2A and HcPTR2B by analysing their transport kinetics in Xenopus laevis oocytes. While both transporters mediated high-affinity di- and tripeptide transport, HcPTR2A also showed low-affinity transport of several amino acids-mostly hydrophobic ones with large side chains.
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https://hal.archives-ouvertes.fr/hal-02922805
Contributor : Chantal Baracco <>
Submitted on : Wednesday, January 6, 2021 - 2:55:43 PM
Last modification on : Tuesday, January 12, 2021 - 3:09:54 AM

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Tobias Müller, Benjamin Neuhäuser, Uwe Ludewig, Gabriella Houdinet, Sabine Zimmermann, et al.. New insights into HcPTR2A and HcPTR2B, two high-affinity peptide transporters from the ectomycorrhizal model fungus Hebeloma cylindrosporum. Mycorrhiza, Springer Verlag, 2020, ⟨10.1007/s00572-020-00983-7⟩. ⟨hal-02922805⟩

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