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A family of pathogen-induced cysteine-rich transmembrane proteins is involved in plant disease resistance. 2021

Marciel Pereira Mendes, and Richard Hickman, and Marcel C Van Verk, and Nicole M Nieuwendijk, and Anja Reinstädler, and Ralph Panstruga, and Corné M J Pieterse, and Saskia C M Van Wees
Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, 800.56, 3508 TB, Utrecht, The Netherlands.

Overexpression of pathogen-induced cysteine-rich transmembrane proteins (PCMs) in Arabidopsis thaliana enhances resistance against biotrophic pathogens and stimulates hypocotyl growth, suggesting a potential role for PCMs in connecting both biological processes. Plants possess a sophisticated immune system to protect themselves against pathogen attack. The defense hormone salicylic acid (SA) is an important player in the plant immune gene regulatory network. Using RNA-seq time series data of Arabidopsis thaliana leaves treated with SA, we identified a largely uncharacterized SA-responsive gene family of eight members that are all activated in response to various pathogens or their immune elicitors and encode small proteins with cysteine-rich transmembrane domains. Based on their nucleotide similarity and chromosomal position, the designated Pathogen-induced Cysteine-rich transMembrane protein (PCM) genes were subdivided into three subgroups consisting of PCM1-3 (subgroup I), PCM4-6 (subgroup II), and PCM7-8 (subgroup III). Of the PCM genes, only PCM4 (also known as PCC1) has previously been implicated in plant immunity. Transient expression assays in Nicotiana benthamiana indicated that most PCM proteins localize to the plasma membrane. Ectopic overexpression of the PCMs in Arabidopsis thaliana resulted in all eight cases in enhanced resistance against the biotrophic oomycete pathogen Hyaloperonospora arabidopsidis Noco2. Additionally, overexpression of PCM subgroup I genes conferred enhanced resistance to the hemi-biotrophic bacterial pathogen Pseudomonas syringae pv. tomato DC3000. The PCM-overexpression lines were found to be also affected in the expression of genes related to light signaling and development, and accordingly, PCM-overexpressing seedlings displayed elongated hypocotyl growth. These results point to a function of PCMs in both disease resistance and photomorphogenesis, connecting both biological processes, possibly via effects on membrane structure or activity of interacting proteins at the plasma membrane.

UI MeSH Term Description Entries
D010935 Plant Diseases Diseases of plants. Disease, Plant,Diseases, Plant,Plant Disease
D010940 Plant Proteins Proteins found in plants (flowers, herbs, shrubs, trees, etc.). The concept does not include proteins found in vegetables for which PLANT PROTEINS, DIETARY is available. Plant Protein,Protein, Plant,Proteins, Plant
D003545 Cysteine A thiol-containing non-essential amino acid that is oxidized to form CYSTINE. Cysteine Hydrochloride,Half-Cystine,L-Cysteine,Zinc Cysteinate,Half Cystine,L Cysteine
D044224 Pseudomonas syringae A species of gram-negative, fluorescent, phytopathogenic bacteria in the genus PSEUDOMONAS. It is differentiated into approximately 50 pathovars with different plant pathogenicities and host specificities. Pseudomonas syringae subsp. syringae
D060467 Disease Resistance The capacity of an organism to defend itself against pathological processes or the agents of those processes. This most often involves innate immunity whereby the organism responds to pathogens in a generic way. The term disease resistance is used most frequently when referring to plants. Resistance, Disease,Disease Resistances,Resistances, Disease
D018506 Gene Expression Regulation, Plant Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in plants. Plant Gene Expression Regulation,Regulation of Gene Expression, Plant,Regulation, Gene Expression, Plant
D020156 Salicylic Acid A compound obtained from the bark of the white willow and wintergreen leaves. It has bacteriostatic, fungicidal, and keratolytic actions. 2-Hydroxybenzoic Acid,o-Hydroxybenzoic Acid,ortho-Hydroxybenzoic Acid,2 Hydroxybenzoic Acid,Acid, 2-Hydroxybenzoic,Acid, Salicylic,Acid, o-Hydroxybenzoic,Acid, ortho-Hydroxybenzoic,o Hydroxybenzoic Acid,ortho Hydroxybenzoic Acid
D029681 Arabidopsis Proteins Proteins that originate from plants species belonging to the genus ARABIDOPSIS. The most intensely studied species of Arabidopsis, Arabidopsis thaliana, is commonly used in laboratory experiments. Arabidopsis thaliana Proteins,Thale Cress Proteins,Proteins, Arabidopsis thaliana,thaliana Proteins, Arabidopsis
D030821 Plants, Genetically Modified PLANTS, or their progeny, whose GENOME has been altered by GENETIC ENGINEERING. Genetically Modified Plants,Plants, Transgenic,Transgenic Plants,GMO Plants,Genetically Engineered Plants,Engineered Plant, Genetically,Engineered Plants, Genetically,GMO Plant,Genetically Engineered Plant,Genetically Modified Plant,Modified Plant, Genetically,Modified Plants, Genetically,Plant, GMO,Plant, Genetically Engineered,Plant, Genetically Modified,Plant, Transgenic,Plants, GMO,Plants, Genetically Engineered,Transgenic Plant

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