Biotechnology Bulletin ›› 2025, Vol. 41 ›› Issue (6): 297-306.doi: 10.13560/j.cnki.biotech.bull.1985.2024-1143

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Cloning of UpNOA1 Gene from Ulmus pumila L. and Screening of Its Interacting Proteins

LIU Xiao-tian1(), HE Yu-qi1,2, LIU Chang1, XUE Hua1()   

  1. 1.School of Biological Sciences and Technology, Beijing Forestry University, State Key Laboratory of Tree Genetics and Breeding, National Engineering Research Center of Tree Breeding and Ecological Remediation, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing 100083
    2.Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081
  • Received:2024-10-29 Online:2025-06-26 Published:2025-06-30
  • Contact: XUE Hua E-mail:liuxiaotian521@163.com;xuehua2013@bjfu.edu.cn

Abstract:

Objective Nitric oxide-related protein NOA1 is associated to the levels of NO in plants, which may be involved in various physiological activities of plants. The UpNOA1 gene was cloned, its tissue-specific expression in elm (Ulmus pumila L.) was analyzed, and the proteins interacting with UpNOA1 was screened, which may provide the basis for studying the function of UpNOA1 in elm. Method Ulmus pumila L. was used as the experimental material, and the NO-related UpNOA1 gene was cloned. The domain architecture and phylogenetic relationships were analyzed using bioinformatics approaches. Tissue-specific expression of UpNOA1 was assessed via RT-qPCR. A vector was constructed for prokaryotic expression analysis, and the resulting UpNOA1 protein was purified. Finally, the UpNOA1 interaction proteins were screened and analyzed by His-PULL DOWN. Result The UpNOA1 gene possesses a 1 698 bp open reading frame, encoding 565 amino acids and containing a conserved GTP/Mg2+ binding sites. Subcellular localization prediction using Plant-mPLoc indicated that the UpNOA1 protein is targeted to chloroplasts. Phylogenetic analysis revealed that the UpNOA1 protein shows the highest sequence homology to UaNOA1 protein from American elm (Ulmus americana) and clusters with it in the phylogenetic tree. RT-qPCR analysis revealed that the expression of UpNOA1 gene is the highest in the leaves, followed by the seeds. A total of 131 proteins were identified as UpNOA1-interacting proteins via His-PULL DOWN assay. KEGG and GO enrichment analyses indicated a predominance of ribosomal proteins is associated with genetic information processing among the interacting proteins. Following annotation and comparison, a list of 25 candidate proteins potentially involved in stress resistance and GTP binding was compiled. Conclusion UpNOA1 gene is cloned. The highest expression is found in leaves, followed by elm seeds. A total of 131 UpNOA1 interacting proteins are identified, of which 25 are associated with stress resistance and GTP binding.

Key words: Ulmus pumila L., NOA1, tissue specific expression, PULL DOWN, interaction protein