Dataset Information

Comparative quantitative LC-MS/MS analysis of 13 amylase/trypsin inhibitors in ancient and modern Triticum species

ABSTRACT: Amylase/trypsin inhibitors (ATIs) are major wheat allergens and they are also implicated in causing non-celiac gluten sensitivity and worsening other inflammatory conditions. With only few studies on ATI contents in different Triticum species available so far, we developed a targeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) method based on stable isotope dilution assays to quantitate the 13 most important ATIs in a well-defined sample set of eight cultivars of common wheat and durum wheat (modern species), as well as spelt, emmer and einkorn (ancient species) grown at three locations in Germany, respectively. Only few ATIs with low contents were detected in einkorn. In contrast, spelt had the highest total ATI contents. Emmer and common wheat had similar total ATI contents, with durum wheat having lower contents than common wheat. Due to the lack of correlation, it was not possible to estimate ATI contents based on crude protein contents. The wheat species had a higher influence on ATI contents than the growing location and the heritability of this trait was high. Despite comparatively low intra-species variability, some cultivars were identified that may be promising candidates for breeding for naturally low ATI contents.

ORGANISM(S): Triticum

SUBMITTER: Sabrina Geisslitz

PROVIDER: PXD020714 | panorama | Fri Mar 12 00:00:00 GMT 2021

REPOSITORIES: PanoramaPublic

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Comparative quantitative LC-MS/MS analysis of 13 amylase/trypsin inhibitors in ancient and modern Triticum species.

Geisslitz Sabrina S Longin C Friedrich H CFH Koehler Peter P Scherf Katharina Anne KA

Scientific reports 20200903 1

Amylase/trypsin inhibitors (ATIs) are major wheat allergens and they are also implicated in causing non-celiac gluten sensitivity and worsening other inflammatory conditions. With only few studies on ATI contents in different Triticum species available so far, we developed a targeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) method based on stable isotope dilution assays to quantitate the 13 most important ATIs in a well-defined sample set of eight cultivars of common wheat and d ...[more]

PMID: 32883982

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Project description:The three subgenomes (B, A and D) of common wheat (2n=6x=42) are largely intact, which makes extraction of the BBAA subgenomes as organismally independent genomes possible. Availability of such novel extracted tetraploid wheat (Extracted-tetra) provides a unique opportunity to study whether and to what extent the BBAA subgenomes of common wheat have been irreversibly modified, as well as its attendant biological consequences, during their evolutionary trajectory as allohexaploidy. We report here that the extracted-tetra is stable in karyotype but with severely deteriorated phenotypes. Microarray-based transcriptome analysis revealed a substantial portion of differentially expressed genes (down- or up-regulation) between extracted and natural tetraploid wheat, Triticum turgidum, which exceeded the transcriptome divergence at tetraploid level, implying reinforced effects of allopolyploidization and domestication at the allohexaploid level. Great majority of the differentially expressed genes showed additive expression in a resynthesized allohexaploid wheat (parented by Extracted-tetra), indicating transcriptome modifications to the BBAA subgenomes are largely irreversible. Analysis of a newly synthesized allohexaploid wheat (parented by T. turgidum) suggests that whereas most of the modified genes are accrued evolutionary changes, some showed immediate regulation post-allohexaploidization and evolutionary perseverance. Homeologue-specific pyrosequencing of 44 genes revealed either concordant or independent expression changes to the B and A homeologues. The Extracted-tetra vs.T. turgidum down-regulated genes showed enrichment for distinct GO categories. Structurally, the three constituent subgenomes of common wheat, BB, AA and DD, are largely intact with only a few inter-subgenomic translocations. Because of these unique attributes, it is feasible to extract the BBAA subgenomes from the common wheat BBAADD genome by hybridization to a durum line and repeated back-crossing to the hexaploid parent, restituting a novel type of extracted tetraploid wheat, namely Extracted-tetr, with a genome constitution BBAA, virtually identical to the subgenomes BBAA of its common wheat donor. Availability of the extracted-tetra, the resynthesized allohexaploid wheat parented by the extracted-tetra, and newly synthesized allohexaploid wheat parented by natural tetraploid wheat, T. turgidum, provides an excellent system to address the issues of whether and to what extent transcriptome modifications to the BBAA subgenomes of common wheat have occurred since its formation ca. 10,000 years ago, timing of the modifications, and their biological consequences. Here, we have addressed these issues by microarray-based transcriptome analysis.

Dataset Information

Comparative quantitative LC-MS/MS analysis of 13 amylase/trypsin inhibitors in ancient and modern Triticum species

Publications

Comparative quantitative LC-MS/MS analysis of 13 amylase/trypsin inhibitors in ancient and modern Triticum species.

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