[In silico analysis of Cit s 2: A highly conserved profilin]

Rev Alerg Mex. 2024 Feb 1;71(1):78. doi: 10.29262/ram.v71i1.1359.
[Article in Spanish]

Abstract

Objective: Analyze phylogenetic relationships and molecular mimicry of Cit s 2 and other plant profilins.

Methods: Online bioinformatics tools including Basic Local Alignment Search Tool (BLASTP), PRALINE and MEGA were used for multiple alignments and phylogenetic analysis. A 3D-homology model of Cit s 2 was predicted. Models were calculated with MODELLER. The best model was selected with the model scoring option of MAESTRO. Conserved regions between Cit s 2 and other profilins were located on the 3D model and antigenic regions were predicted by ElliPro server (3-5).

Results: Cit s 2 amino acid sequence (Uniprot code:P84177) was compared with other 30 profilins from different allergenic sources. The identity between Cit s 2 and other profilins ranged between 82 and 99%. The highest identity was observed with Cucumis melo (99%) followed by Prunus persica (98%) and Malus domestica (92%). High conserved antigenic regions were observed on the 3D predicted model. Seven lineal and six discontinuous epitopes were found in Cit s 2.

Conclusion: High conserved antigenic regions were observed on the 3D predicted model of Cit s 2, which might involve potential cross-reactivity between Cit s 2 and other profilins. Future studies are needed to further analyze these results.

Objetivo: Analizar las relaciones filogenéticas y el mimetismo molecular de Cit s 2 y otras profilinas vegetales.

Métodos: Se utilizaron herramientas bioinformáticas en línea, incluida la de búsqueda de alineación local básica (BLASTP), PRALINE y MEGA, para alineamientos múltiples y análisis filogenético. Se predijo un modelo de homología 3D de Cit s 2. Los modelos se calcularon con MODELLER. El mejor modelo fue seleccionado con la opción de puntuación de modelo de Maestro. Las regiones conservadas entre Cit s 2 y otras profilinas se ubicaron en el modelo 3D y las regiones antigénicas fueron predichas por el servidor ElliPro (3-5).

Resultados: La secuencia de aminoácidos de Cit s 2 (código Uniprot: P84177), se comparó con otras 30 profilinas de diferentes fuentes alergénicas. La mayor identidad se observó con Cucumis melo (99%) seguida de Prunus persica (98%) y Malus domestica (92%). Se observaron regiones antigénicas altamente conservadas en el modelo predicho en 3D. Se encontraron siete epítopes lineales, y seis epítopes discontinuos en Cit s 2.

Conclusión: Se observaron regiones antigénicas altamente conservadas en el modelo 3D predicho de Cit s 2, lo que podría implicar una posible reactividad cruzada entre Cit s 2 y otras profilinas. Se necesitan estudios futuros para analizar más a fondo estos resultados.

Keywords: Alignment; Allergen; Bioinformatic; Orange; Profilins.

Publication types

  • English Abstract

MeSH terms

  • Allergens / immunology
  • Amino Acid Sequence
  • Antigens, Plant* / chemistry
  • Computer Simulation
  • Conserved Sequence
  • Cucumis / chemistry
  • Cucumis / metabolism
  • Malus / chemistry
  • Malus / metabolism
  • Models, Molecular
  • Phylogeny
  • Plant Proteins / immunology
  • Profilins* / chemistry
  • Profilins* / genetics
  • Profilins* / immunology
  • Prunus persica / chemistry
  • Prunus persica / metabolism

Substances

  • Allergens
  • Plant Proteins
  • Profilins
  • Antigens, Plant