Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP)

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Standard

Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP). / Sooriyaarachchi, Sanjeewani; Jaber, Emad; Covarrubias, Adrian Suárez; Ubhayasekera, Wimal; Asiegbu, Frederick O; Mowbray, Sherry L.

I: Plant Molecular Biology, Bind 77, Nr. 1-2, 17.05.2011, s. 33-45.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Harvard

Sooriyaarachchi, S, Jaber, E, Covarrubias, AS, Ubhayasekera, W, Asiegbu, FO & Mowbray, SL 2011, 'Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP)', Plant Molecular Biology, bind 77, nr. 1-2, s. 33-45. https://doi.org/10.1007/s11103-011-9791-z

APA

Sooriyaarachchi, S., Jaber, E., Covarrubias, A. S., Ubhayasekera, W., Asiegbu, F. O., & Mowbray, S. L. (2011). Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP). Plant Molecular Biology, 77(1-2), 33-45. https://doi.org/10.1007/s11103-011-9791-z

Vancouver

Sooriyaarachchi S, Jaber E, Covarrubias AS, Ubhayasekera W, Asiegbu FO, Mowbray SL. Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP). Plant Molecular Biology. 2011 maj 17;77(1-2):33-45. https://doi.org/10.1007/s11103-011-9791-z

Author

Sooriyaarachchi, Sanjeewani ; Jaber, Emad ; Covarrubias, Adrian Suárez ; Ubhayasekera, Wimal ; Asiegbu, Frederick O ; Mowbray, Sherry L. / Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP). I: Plant Molecular Biology. 2011 ; Bind 77, Nr. 1-2. s. 33-45.

Bibtex

@article{2179a47dacc74d2aa2207fcd2599f23f,
title = "Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP)",
abstract = "Scots pine (Pinus sylvestris) secretes a number of small, highly-related, disulfide-rich proteins (Sp-AMPs) in response to challenges with fungal pathogens such as Heterobasidion annosum, although their biological role has been unknown. Here, we examined the expression patterns of these genes, as well as the structure and function of the encoded proteins. Northern blots and quantitative real time PCR showed increased levels of expression that are sustained during the interactions of host trees with pathogens, but not non-pathogens, consistent with a function in conifer tree defenses. Furthermore, the genes were up-regulated after treatment with salicylic acid and an ethylene precursor, 1-aminocyclopropane-1-carboxylic-acid, but neither methyl jasmonate nor H(2)O(2) induced expression, indicating that Sp-AMP gene expression is independent of the jasmonic acid signaling pathways. The cDNA encoding one of the proteins was cloned and expressed in Pichia pastoris. The purified protein had antifungal activity against H. annosum, and caused morphological changes in its hyphae and spores. It was directly shown to bind soluble and insoluble {\ss}-(1,3)-glucans, specifically and with high affinity. Furthermore, addition of exogenous glucan is linked to higher levels of Sp-AMP expression in the conifer. Homology modeling and sequence comparisons suggest that a conserved patch on the surface of the globular Sp-AMP is a carbohydrate-binding site that can accommodate approximately four sugar units. We conclude that these proteins belong to a new family of antimicrobial proteins (PR-19) that are likely to act by binding the glucans that are a major component of fungal cell walls.",
keywords = "Former Faculty of Pharmaceutical Sciences",
author = "Sanjeewani Sooriyaarachchi and Emad Jaber and Covarrubias, {Adrian Su{\'a}rez} and Wimal Ubhayasekera and Asiegbu, {Frederick O} and Mowbray, {Sherry L}",
note = "Keywords: antimicrobial protein, Heterobasidion annosum, beta-(1,3)-glucan, chitin, inhibition, binding, homology modeling, Pinus sylvestris",
year = "2011",
month = "5",
day = "17",
doi = "10.1007/s11103-011-9791-z",
language = "English",
volume = "77",
pages = "33--45",
journal = "Plant Molecular Biology",
issn = "0167-4412",
publisher = "Springer",
number = "1-2",

}

RIS

TY - JOUR

T1 - Expression and beta-glucan binding properties of Scots pine (Pinus sylvestris L.) antimicrobial protein (Sp-AMP)

AU - Sooriyaarachchi, Sanjeewani

AU - Jaber, Emad

AU - Covarrubias, Adrian Suárez

AU - Ubhayasekera, Wimal

AU - Asiegbu, Frederick O

AU - Mowbray, Sherry L

N1 - Keywords: antimicrobial protein, Heterobasidion annosum, beta-(1,3)-glucan, chitin, inhibition, binding, homology modeling, Pinus sylvestris

PY - 2011/5/17

Y1 - 2011/5/17

N2 - Scots pine (Pinus sylvestris) secretes a number of small, highly-related, disulfide-rich proteins (Sp-AMPs) in response to challenges with fungal pathogens such as Heterobasidion annosum, although their biological role has been unknown. Here, we examined the expression patterns of these genes, as well as the structure and function of the encoded proteins. Northern blots and quantitative real time PCR showed increased levels of expression that are sustained during the interactions of host trees with pathogens, but not non-pathogens, consistent with a function in conifer tree defenses. Furthermore, the genes were up-regulated after treatment with salicylic acid and an ethylene precursor, 1-aminocyclopropane-1-carboxylic-acid, but neither methyl jasmonate nor H(2)O(2) induced expression, indicating that Sp-AMP gene expression is independent of the jasmonic acid signaling pathways. The cDNA encoding one of the proteins was cloned and expressed in Pichia pastoris. The purified protein had antifungal activity against H. annosum, and caused morphological changes in its hyphae and spores. It was directly shown to bind soluble and insoluble ß-(1,3)-glucans, specifically and with high affinity. Furthermore, addition of exogenous glucan is linked to higher levels of Sp-AMP expression in the conifer. Homology modeling and sequence comparisons suggest that a conserved patch on the surface of the globular Sp-AMP is a carbohydrate-binding site that can accommodate approximately four sugar units. We conclude that these proteins belong to a new family of antimicrobial proteins (PR-19) that are likely to act by binding the glucans that are a major component of fungal cell walls.

AB - Scots pine (Pinus sylvestris) secretes a number of small, highly-related, disulfide-rich proteins (Sp-AMPs) in response to challenges with fungal pathogens such as Heterobasidion annosum, although their biological role has been unknown. Here, we examined the expression patterns of these genes, as well as the structure and function of the encoded proteins. Northern blots and quantitative real time PCR showed increased levels of expression that are sustained during the interactions of host trees with pathogens, but not non-pathogens, consistent with a function in conifer tree defenses. Furthermore, the genes were up-regulated after treatment with salicylic acid and an ethylene precursor, 1-aminocyclopropane-1-carboxylic-acid, but neither methyl jasmonate nor H(2)O(2) induced expression, indicating that Sp-AMP gene expression is independent of the jasmonic acid signaling pathways. The cDNA encoding one of the proteins was cloned and expressed in Pichia pastoris. The purified protein had antifungal activity against H. annosum, and caused morphological changes in its hyphae and spores. It was directly shown to bind soluble and insoluble ß-(1,3)-glucans, specifically and with high affinity. Furthermore, addition of exogenous glucan is linked to higher levels of Sp-AMP expression in the conifer. Homology modeling and sequence comparisons suggest that a conserved patch on the surface of the globular Sp-AMP is a carbohydrate-binding site that can accommodate approximately four sugar units. We conclude that these proteins belong to a new family of antimicrobial proteins (PR-19) that are likely to act by binding the glucans that are a major component of fungal cell walls.

KW - Former Faculty of Pharmaceutical Sciences

U2 - 10.1007/s11103-011-9791-z

DO - 10.1007/s11103-011-9791-z

M3 - Journal article

C2 - 21584858

VL - 77

SP - 33

EP - 45

JO - Plant Molecular Biology

JF - Plant Molecular Biology

SN - 0167-4412

IS - 1-2

ER -

ID: 33874950