The Hydrophobin-Like OmSSP1 May Be an Effector in the Ericoid Mycorrhizal Symbiosis

Frontiers in Plant Science
Salvatore CasarrubiaElena Martino

Abstract

Mutualistic and pathogenic plant-colonizing fungi use effector molecules to manipulate the host cell metabolism to allow plant tissue invasion. Some small secreted proteins (SSPs) have been identified as fungal effectors in both ectomycorrhizal and arbuscular mycorrhizal fungi, but it is currently unknown whether SSPs also play a role as effectors in other mycorrhizal associations. Ericoid mycorrhiza is a specific endomycorrhizal type that involves symbiotic fungi mostly belonging to the Leotiomycetes (Ascomycetes) and plants in the family Ericaceae. Genomic and RNASeq data from the ericoid mycorrhizal fungus Oidiodendron maius led to the identification of several symbiosis-upregulated genes encoding putative SSPs. OmSSP1, the most highly symbiosis up-regulated SSP, was found to share some features with fungal hydrophobins, even though it lacks the Pfam hydrophobin domain. Sequence alignment with other hydrophobins and hydrophobin-like fungal proteins placed OmSSP1 within Class I hydrophobins. However, the predicted features of OmSSP1 may suggest a distinct type of hydrophobin-like proteins. The presence of a predicted signal peptide and a yeast-based signal sequence trap assay demonstrate that OmSSP1 is secreted. OmSSP1 null-m...Continue Reading

Associated Datasets

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Citations

May 8, 2020·Biomolecules·Karla Gisel Carreón-AnguianoBlondy Canto-Canché
Jul 23, 2020·Nature Reviews. Microbiology·Andrea GenrePaola Bonfante

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Datasets Mentioned

BETA
GSE63947

Methods Mentioned

BETA
RNA-Seq
PCR

Software Mentioned

ProtScale
WolfPSort
Praline
PS
PhyML
TreeDyn
PAST
PFAM
Phylogeny
MUSCLE Open penalty−2

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