Abstract
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Objective: To analyze the phylogenetic relationships and molecular mimicry of Cit s 2 and other plant profilins.
Methods: Online bioinformatics tools, including BLASTP, PRALINE, and MEGA, were used for multiple alignments and phylogenetic analysis. A 3D homology model of Cit s 2 was predicted using MODELLER. The best model was selected based on the Maestro model scoring option. Conserved regions between Cit s 2 and other profilins were mapped onto the 3D model, and antigenic regions were predicted using the ElliPro server.
Results: The amino acid sequence of Cit s 2 (Uniprot code: P84177) was compared with 30 other profilins from different allergenic sources. The highest identity was observed with Cucumis melo (99%), followed by Prunus persica (98%) and Malus domestica (92%). Highly conserved antigenic regions were observed in the predicted 3D model. Seven linear epitopes and six discontinuous epitopes were identified in Cit s 2.
Conclusion: Highly conserved antigenic regions were observed in the predicted 3D model of Cit s 2, suggesting potential cross-reactivity between Cit s 2 and other profilins. Further studies are needed to analyze these findings in more detail.
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