Dataset Information

Gall aphid saliva LC-MS/MS - Proteins Identified from Saliva and Salivary Glands of the Chinese Gall Aphid Schlechtendalia chinensis

ABSTRACT: Aphid saliva plays an essential role in the interaction between aphids and their host plants. Several aphid salivary proteins have been identified and analyzed. However, none of the characterized salivary proteins are from galling aphids. Here we analyzed the salivary proteins from the Chinese gall aphid, Schlechtendalia chinensis using LS-MS/MS analysis. A total of 31 proteins were identified directly from secreted saliva collected via artificial diet, and 141 proteins were identified from protein extracts derived from dissected salivary glands. Among these identified proteins, 17 were found in both secreted saliva and dissected salivary glands. In comparison with salivary proteins identified from three other free living aphids, the most striking feature of the salivary protein from S. chinensis is the existence of high proportion of proteins with binding activity, including DNA binding, protein binding, ATP binding and ion binding proteins et al. We speculate that these binding proteins may be involved in induction of gall formation. Our results provide a framework for future research to elucidate the molecular basis for gall induction by S. chinensis.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Schlechtendalia Chinensis

TISSUE(S): Saliva

SUBMITTER: Zixiang Yang

LAB HEAD: Zixiang Yang

PROVIDER: PXD008928 | Pride | 2018-07-05

REPOSITORIES: Pride

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Dataset's files

Source:

			Action	DRS
	Aphidsaliva-aphidbase_2_1b_pep.dat	Other
	Aphidsaliva-aphidbase_v2_pep.dat	Other
	Aphidsaliva.mgf	Mgf
	Aphidsaliva.raw	Raw

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Proteins Identified from Saliva and Salivary Glands of the Chinese Gall Aphid Schlechtendalia chinensis.

Yang Zixiang Z Ma Lin L Francis Frederic F Yang Ying Y Chen Hang H Wu Haixia H Chen Xiaoming X

Proteomics 20180416 9

Aphid saliva plays an essential role in the interaction between aphids and their host plants. Several aphid salivary proteins have been identified but none from galling aphids. Here the salivary proteins from the Chinese gall aphid are analyzed, Schlechtendalia chinensis, via an LC-MS/MS analysis. A total of 31 proteins are identified directly from saliva collected via an artificial diet, and 141 proteins are identified from extracts derived from dissected salivary glands. Among these identified ...[more]

PMID: 29577599

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Project description:Compatibility between aphids and plant hosts is genetically determined by both interactingorganisms. For example, plants may carry resistance (R) genes or deploy chemical defences.Aphid saliva contains many proteins that are secreted into host tissues. Subsets of these proteins are predicted to act as effectors, either subverting or triggering host immunity. However, associating particular effectors with virulence or avirulence outcomes presents challenges due to the combinatorial complexity. Here we use defined aphid and host geneticsto test for co-segregation of expressed aphid transcripts and proteins with virulent or avirulent phenotypes. We compared virulent and avirulent pea aphid parental genotypes, and their bulk segregant F1 progeny on Medicago truncatula genotypes carrying or lacking the RAP1 resistance quantitative trait locus. Differential expression analysis based on RNA sequencing of whole bodyand head samples, in combination with proteomics of saliva and salivary glands, enabled us to pinpoint proteins associated with virulence/avirulence phenotypes. There was relatively little impact of host genotype, whereas large numbers of transcripts and proteins were differentially expressed between parental aphids, likely a reflection of their classification as divergent biotypes within the pea aphid species complex. Many fewer transcripts intersected with the equivalent differential expression patterns in the bulked F1F1 progeny, providing an effective filter for removing genomic background effects. Overall, there were more upregulated genes detected in the F1 avirulent dataset compared with the virulent one. Some of the differentially expressed transcripts were also found in the differentially expressed proteomes, with aminopeptidase N proteins being the most frequent differentiallyexpressed family. In addition, a substantial proportion (23%) of salivary proteins lack annotations, suggesting that many novel functions remain to be discovered.

Project description:Compatibility between aphids and plant hosts is genetically determined by both interacting organisms. For example, plants may carry resistance (R) genes or deploy chemical defences. Aphid saliva contains many proteins that are secreted into host tissues. Subsets of these proteins are predicted to act as effectors, either subverting or triggering host immunity. However, associating particular effectors with virulence or avirulence outcomes presents challenges due to the combinatorial complexity. Here we use defined aphid and host geneticsto test for co-segregation of expressed aphid transcripts and proteins with virulent or avirulent phenotypes. We compared virulent and avirulent pea aphid parental genotypes, and their bulk segregant F1 progeny on Medicago truncatula genotypes carrying or lacking the RAP1 resistance quantitative trait locus. Differential expression analysis based on RNA sequencing of whole bodyand head samples, in combination with proteomics of saliva and salivary glands, enabled us to pinpoint proteins associated with virulence/avirulence phenotypes. There was relatively little impact of host genotype, whereas large numbers of transcripts and proteins were differentially expressed between parental aphids, likely a reflection of their classification as divergent biotypes within the pea aphid species complex. Many fewer transcripts intersected with the equivalent differential expression patterns in the bulked F1F1 progeny, providing an effective filter for removing genomic background effects. Overall, there were more upregulated genes detected in the F1 avirulent dataset compared with the virulent one. Some of the differentially expressed transcripts were also found in the differentially expressed proteomes, with aminopeptidase N proteins being the most frequent differentially expressed family. In addition, a substantial proportion (23%) of salivary proteins lack annotations, suggesting that many novel functions remain to be discovered.