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The PpLTP1 Primary Allergen Gene is Highly Conserved in Peach and Has Small Variations in Other Prunus Species

文献类型： 外文期刊

作者： Ma, Ying-tao 1 ; Zhou, Xiang 1 ; Gao, Zhong-shan 1 ; Li, Xiong-wei 1 ; Jia, Hui-juan 1 ; Wu, Hong-xia 1 ; Xie, Rang-ji 1 ;

作者机构： 1.Zhejiang Univ, Dept Hort, State Agr Minist Lab Hort Plant Growth Dev & Qual, Hangzhou 310058, Zhejiang, Peoples R China

2.Zhejiang Univ, Allergy Res Ctr, Hangzhou 310058, Zhejiang, Peoples R China

3.Chinese Acad Agr Sci, Zhengzhou Fruit Res Inst, Zhengzhou, Peoples R China

4.Chinese Acad Agr Sci, Zhe

关键词： Prunus persica;Lipid transfer protein;Genetic diversity;Allele frequency;Peach subpopulation

期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Peach lipid transfer protein (LTP1), Pru p 3.01, is a major allergen causing severe systemic reactions in peach allergic patients in Mediterranean countries and China. Significant expression variability has been reported among peach cultivars at both transcript and protein level. In this study, the allele diversity of the LTP1-encoding gene was assessed in a large set of peach cultivars by direct sequencing of the gene and its upstream region. Evolution of the LTP1-encoding genes in peach (Prunus persica) and three other Prunus species (Prunus kansuensis, Prunus mira, and Prunus davidiana) were also inferred. Sequence analysis revealed that LTP1-encoding genes are highly conserved among peach cultivars and wild peach. Three different allele sequences were obtained from 50 Prunus accessions on the basis of the upstream region of the LTP1-encoding gene and three allele specific markers were derived according to the polymorphic sites. These markers were used to test 316 peach cultivars, most of which clustered within the three main subpopulations of peach, 'Yu Lu', 'Hakuho' and landraces. The genotypic frequencies and allele frequencies in the oriental peach cultivars in these subpopulations except for 'Yu Lu' were found to be in Hardy-Weinberg equilibrium (P < 0.05). The dominant alleles were upLTP1-a in the 'Yu Lu' subpopulation and upLTP1-c in the 'Hakuho' subpopulation, allele upLTP1-b and allele upLTP1-c had the highest rates in the landraces, and the dominant allele in the three peach wild relatives was allele upLTP1-b. Furthermore, we found many light-responsive elements in the upstream region. Most of the polymorphic sites in Prunus species are located in the intron region. Phylogenetic analysis suggests that Prunus kansuensis KC311794 and Prunus mira KC311791 are related more closely to Prunus persica KC311795 than to Prunus davidiana KC311792 and KC311793. The allele sequences we derived on the basis of this variability were distributed unevenly, indicating the need to study allergenicity in different subpopulations and the association between allele sequences and allergenicity.

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