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Post-translational cleavage of HMW-GS Dy10 allele improves the cookie-making quality in common wheat (Triticum aestivum)

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Abstract

Wheat is a major staple food crop worldwide because of the unique properties of wheat flour. High molecular weight glutenin subunits (HMW-GSs), which are among the most critical determinants of wheat flour quality, are responsible for the formation of glutenin polymeric structures via interchain disulfide bonds. We herein describe the identification of a new HMW-GS Dy10 allele (Dy10-m619SN). The amino acid substitution (serine-to-asparagine) encoded in this allele resulted in a partial post-translational cleavage that produced two new peptides. These new peptides disrupted the interactions among gluten proteins because of the associated changes to the number of available cysteine residues for interchain disulfide bonds. Consequently, Dy10-m619SN expression decreased the size of glutenin polymers and weakened glutens, which resulted in wheat dough with improved cookie-making quality, without changes to the glutenin-to-gliadin ratio. In this study, we clarified the post-translational processing of HMW-GSs and revealed a new genetic resource useful for wheat breeding.

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Acknowledgements

We thank Prof. Peter Shewry at Rothamsted Research and Dr. Yufeng Hu at Sichuan Agricultural University for technical assistance. We acknowledge Liwen Bianji, Edanz Editing China (www.liwenbianji.cn/ac) for editing the English text of a draft of this manuscript.

Funding

This study was supported by the National Natural Science Foundation of China (grant numbers 31971939, 31671677, and 32072054), the Science and Technology Department of Sichuan Province (2019YFH0066, 20GJHZ0048, and 2018NZDZX002), and the Designing Future Wheat strategic program (BB/P016855/1) of the UK. Yan Wang acknowledges funding by the China Scholarship Council.

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P. Q and Y. Z designed the experiments. Y. W, Q. C, and P. Q wrote the manuscript. P. Q and Q. C prepared the plant materials. Y. W, Q. C, Y. L, Z. G, C. L, Y. W, M. H, J. Z, W. W, M. W, K. Z, Y. J, Y. Z, Q. X, L. K, Z. P, M. D, Q. J, X. L, J. W, G. C, J. M, Y. Z, Y. W, and P. Q conducted the experiments, analyzed the data, and provided key advice. All authors discussed the results and helped revise the manuscript.

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Correspondence to Youliang Zheng or Pengfei Qi.

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Wang, Y., Chen, Q., Li, Y. et al. Post-translational cleavage of HMW-GS Dy10 allele improves the cookie-making quality in common wheat (Triticum aestivum). Mol Breeding 41, 49 (2021). https://doi.org/10.1007/s11032-021-01238-9

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  • DOI: https://doi.org/10.1007/s11032-021-01238-9

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