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园艺学报 ›› 2025, Vol. 52 ›› Issue (10): 2625-2641.doi: 10.16420/j.issn.0513-353x.2024-0833

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

芜菁酵母文库的构建和PSY潜在互作蛋白BrrCDPK家族成员鉴定

边拴灵1, 邓昌蓉1, 樊露泽2, 吴延寻1, 任延靖1,3,*()   

  1. 1 青海大学,青海省农林科学院园艺研究所,西宁 810016
    2 青海大学农牧学院,西宁 810016
    3 农业农村部青藏高原种质资源保护与遗传改良重点实验室,西宁 810016
  • 收稿日期:2025-03-18 修回日期:2025-06-16 出版日期:2025-10-25 发布日期:2025-10-28
  • 通讯作者:
  • 基金资助:
    国家自然科学基金项目(31960602); 青海省科技厅项目(2024-ZJ-755)

Construction of Yeast Library and Identification of the BrrCDPK Gene Family of PSY Potential Interacting Proteins in Turnip

BIAN Shuanling1, DENG Changrong1, FAN Luze2, WU Yanxun1, REN Yanjing1,3,*()   

  1. 1 Qinghai University,Institute of Horticulture,Qinghai Academy of Agricultural and Forestry Sciences,Xining 810016,China
    2 College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,Chian
    3 Key Laboratory of Germplasm Resources Protection and Genetic Improvement of Tibetan Plateau,Ministry of Agriculture and Rural Affairs,Xining 810016,China
  • Received:2025-03-18 Revised:2025-06-16 Published:2025-10-25 Online:2025-10-28

摘要:

以黄色芜菁W25和白色芜菁W21的不同组织为材料,构建芜菁cDNA酵母文库,库容1.5 × 107 CFU,插入片段平均长度 > 1 000 bp。通过构建的诱饵载体pGBKT7-PSY与构建的cDNA文库杂交,共获得了18个阳性互作蛋白,通过酵母双杂交及双分子荧光互补(BiFC)验证,明确了候选蛋白CDPK8与PSY存在互作关系。对CDPK家族进行鉴定,共鉴定出50个含有STKc_CAMK protein kinase和2个EF-hand结构域的CDPK基因(命名为BrrCDPK1 ~ BrrCDPK50),结构分析显示CDPK编码氨基酸数在411 ~ 660个之间,平均等电点为8.79,各CDPK蛋白之间保守基序数和结构差异不明显,均含有motif 1、motif 2、motif 3和motif 6,染色体定位显示BrrCDPKs在7条染色体上的分布是非随机的;系统发育分析表明芜菁BrrCDPK与拟南芥AtCDPK被聚为不同类,暗示其在进化过程中的基因复制具有一定的种属特异性,基因表达谱分析鉴定出14个在黄色芜菁中高表达的CDPK基因。

关键词: 芜菁, 类胡萝卜素, 酵母双杂交, 互作蛋白, 钙依赖性蛋白激酶, 基因家族鉴定

Abstract:

Different tissues of yellow turnip W25 and white turnip W21 were used as plant materials to construct cDNA yeast library of turnip,whose library capacity was 1.5 × 107 CFU and average length of insert frangment was greater than 1 000 bp. A total of 18 positive interacting proteins were obtained by hybridizing the constructed bait vector pGBKT7-PSY with the cDNA library. Then,a robust interaction between the candidate protein CDPK8 and PSY was confirmed by rigorous yeast two-hybrid and bimolecular fluorescence complementation(BiFC)experiments. The interacting protein CDPK was selected for gene family analysis,and a total of 50 CDPK genes(named BrrCDPK1-BrrCDPK50)members with STKc_CAMK protein kinase and 2 domains of EF-hand were identified. Structural analysis revealed that the number of amino acids encoded by CDPK genes ranged from 411 to 660,with an averagetheoretical pI of 8.79. No number and structural differences of conserved motifs among each CDPK proteins were found,and all proteins contained motif 1,motif 2,motif 3 and motif 6. Chromosome location showed that the distribution of BrrCDPKs on each chromosome was nonrandom. Phylogenetic analysis revealed that BrrCDPKs and AtCDPKs were clustered into different groups,indicating that CDPK gene duplication during evolution existed some species specificity. Gene expression profiling identified that 14 CDPK genes were highly expressed in yellow turnips than that in white turnip.

Key words: Brassica rapa ssp. rapifera, carotenoid, yeast two-hybrid, interactive protein, calcium-dependent protein kinase(CDPK), gene family identification