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Evolutionarily conserved bacterial effectors hijack abscisic acid signaling to induce an aqueous microenvironment in the apoplast

ABSTRACT: Evolutionarily conserved bacterial effectors hijack abscisic acid signaling to induce an aqueous microenvironment in the apoplast

PROVIDER: PRJNA776258 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR16636822_1.fastq.gz	Fastqsanger.gz
	SRR16636822_2.fastq.gz	Fastqsanger.gz
	SRR16636823_1.fastq.gz	Fastqsanger.gz
	SRR16636823_2.fastq.gz	Fastqsanger.gz
	SRR16636824_1.fastq.gz	Fastqsanger.gz

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Project description:Arthropod-borne pathogens and parasites are major threats to human health and global agriculture. They may directly or indirectly manipulate behaviors of arthropod vector for rapid transmission between hosts. The largest genus of plant viruses, Begomovirus, is transmitted exclusively by whitefly (Bemisia tabaci), a complex of at least 34 morphologically indistinguishable species. We have previously shown that plants infected with the tomato yellowleaf curl China virus (TYLCCNV) and its associated betasatellite (TYLCCNB) attract their whitefly vectors by subverting plant MYC2-regulated terpenoid biosynthesis, therefore forming an indirect mutualism between virus and vector via plant. However, the evolutionary mechanism of interactions between begomoviruses and their whitefly vectors is still poorly understood. Here we present evidence to suggest that indirect mutualism may happen over a millennium ago and at present extensively prevails. Detailed bioinformatics and functional analysis identified the serine-33 as an evolutionary conserved phosphorylation site in 105 of 119 Betasatellite species-encoded βC1 proteins, which are responsible for suppressing plant terpenoid-based defense by interfering with MYC2 dimerization and are essential to promote whitefly performance. The substitution of serine-33 of βC1 proteins with either aspartate (phosphorylation mimic mutants) or cysteine, the amino acid in the non-functional sβC1 encoded by Siegesbeckia yellow vein betasatellite SiYVB) impaired the ability of βC1 functions on suppression of MYC2 dimerization, whitefly attraction and fitness. Moreover the gain of function mutation of cysteine-31 to serine in sβC1 protein of SiYVB restored these functions of βC1 protein. Thus, the dynamic phosphorylation of serine-33 in βC1 proteins helps the virus to evade host defense against insect vectors with an evolutionarily conserved manner. Our data provide a mechanistic explanation of how arboviruses evolutionarily modulate host defenses for rapid transmission.

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Evolutionarily conserved bacterial effectors hijack abscisic acid signaling to induce an aqueous microenvironment in the apoplast

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