Abstract
This chapter draws upon the recently released genome sequence of the yellow-fleshed, red-centred A. chinensis var. chinensis cultivar ‘Hongyang’ to prepare an inventory of allergen proteins in this genotype, termed the ‘allergome’. It will be of use to clinicians and industry for better management of kiwifruit allergy. By combining this information with publicly available transcriptomic data for a ‘Hongyang’ whole fruit developmental series, a draft list of relevant fruit allergen proteins of ‘Hongyang’ is presented. The reference to ‘draft’ list is used because the ‘Hongyang’ genome is still only 80 % assembled, and so a number of potential allergens remain unmapped. This chapter presents a number of interesting findings including the reason for the low actinidin (Act c 1) content of ‘Hongyang’, the surprisingly small gene family of Bet v 1-like allergens (Act c 8) together with their likely hypoallergenicity, the intriguing and diverse family of kiwellins (Act c 5) of which transcripts of only one is present in fruit but is also the most expressed gene in fruit, the identification of the Act c 3 locus (previously for which there was only a short peptide sequence), the diversity of the thaumatin-like protein (Act c 2) and the profilin (Act c 9) gene families, and the lack of non-specific lipid transfer protein allergen (Act c 10) in ‘Hongyang’ fruit. In addition to these findings, a high degree of clustering was found for many allergen gene classes and the implications for breeding with regard to allergenicity are discussed.
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The author would like to thank Marcus Davy for his help with plotting Fig. 17.2 as well as a review of the draft manuscript by Dr Ross Atkinson (both employed at The New Zealand Institute of Plant & Food Research Limited).
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Bulley, S.M. (2016). The Kiwifruit Allergome. In: Testolin, R., Huang, HW., Ferguson, A. (eds) The Kiwifruit Genome. Compendium of Plant Genomes. Springer, Cham. https://doi.org/10.1007/978-3-319-32274-2_17
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