Lytic Polysaccharide Monooxygenases as Chitin-Specific Virulence Factors in Crayfish Plague.

Lytic Polysaccharide Monooxygenases as Chitin-Specific Virulence Factors in Crayfish Plague.
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克氏原螯虾鼠疫几丁质特异性毒力因子裂解多糖单加氧酶的研究

DOI:
10.3390/biom11081180
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发表时间:
2021-08-09
期刊:
影响因子:
5.5
通讯作者:
McQueen-Mason SJ
McQueen-Mason SJ
中科院分区:
生物学2区
文献类型:
--
作者:
Sabbadin F;Henrissat B;Bruce NC;McQueen-Mason SJ

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卵菌病原体Aphanomyces astaci,也称为“小龙虾瘟疫”,是淡水甲壳动物的专性真菌样寄生虫,被认为是导致欧洲本土小龙虾种群持续下降的原因。A.据认为,ASTACI分泌促进感染的多种效应物和酶,然而,它们的分子机制的特征很差。在这里,我们报告的鉴定AA 15溶解性多糖单加氧酶(LPMO)作为一个新的组分泌的毒力因子在A。astaci。我们发现,这种酶家族在A.与所有其他卵菌相比,它可能通过氧化降解结晶甲壳素(甲壳类动物外骨骼中发现的最丰富的多糖)而促进感染。这些发现揭示了LPMO在动物-病原体相互作用中的新作用,并有助于为未来保护养殖和濒危物种的战略提供信息。
The oomycete pathogen Aphanomyces astaci, also known as “crayfish plague”, is an obligate fungal-like parasite of freshwater crustaceans and is considered responsible for the ongoing decline of native European crayfish populations. A. astaci is thought to secrete a wide array of effectors and enzymes that facilitate infection, however their molecular mechanisms have been poorly characterized. Here, we report the identification of AA15 lytic polysaccharide monooxygenases (LPMOs) as a new group of secreted virulence factors in A. astaci. We show that this enzyme family has greatly expanded in A. astaci compared to all other oomycetes, and that it may facilitate infection through oxidative degradation of crystalline chitin, the most abundant polysaccharide found in the crustacean exoskeleton. These findings reveal new roles for LPMOs in animal–pathogen interactions, and could help inform future strategies for the protection of farmed and endangered species.
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