Información del artículo
Resumen
Antecedentes
En las proteínas no se logra siempre su cristalización, de buen tamaño y de buena calidad para someterla a difracción de rayos X. De tal manera que se abre un campo para el desarrollo de estudios teóricos moleculares y proteínicos, que permiten la representación de las moléculas en tres dimensiones, proporcionando una información espacial para estudiar la interacción entre ligandos y receptores macromoleculares.
Materiales y MétodosEstudio In silico, a partir del análisis de secuencias primarias de seis diferentes proteínas LuxS cristalizadas de diversas bacterias, se seleccionó la proteína 1J6X del Helicobacter pylori, por su similaridad con la secuencia de la proteína LuxS en Porphyromonas gingivalis (P. gingivalis) cepa W83, para producir un modelo por homología de esta proteína, utilizando los programas Sybyl y MOE. Se realizó un acoplamiento con el ligando natural para evaluar la reproducibilidad del modelo en un ambiente biológico.
ResultadosSe desarrolló el modelado de la proteína LuxS de P. gingivalis cepa W83, que permite el acercamiento a una estructura que se propone, por la interacción entre la proteína y su ligando natural. El modelo generado con recursos computacionales logró una correcta estructura molecular que aceptó la realización de diversos cálculos. El acoplamiento demostró una cavidad donde se logran diversas posiciones del ligando con buenos resultados.
ConclusionesSe obtuvo un modelo 3D para la proteína LuxS en la P. gingivalis cepa W83 validado por diferentes métodos computacionales con una adecuada reproducibilidad biológica por medio del acoplamiento molecular.
Palabras clave:
Homología estructural de proteína
Porphyromonas gingivalis
conformación molecular
bacterias gram negativas
periodoncia (Decs Bireme)
Abstract
Background
Crystallization is not always achieved for all proteins in a good size and a good quality for X-ray diffraction. So that condition opens a field for the development of theoretical molecular and protein studies allowing the representation of the molecules in 3D, providing spatial information to study the interaction between ligands and macromolecular receptors.
Materials and MethodsIn silico study from primary sequence analysis of six different proteins LuxS crystallized of several bacteria. 1J6X protein of Helicobacter pylori was selected for its similarity with the LuxS protein sequence in Porphyromonas gingivalis (P. gingivalis) strain W83 to produce a homology model of this protein, using the Sybyl and MOE software. A docking was performed to assess the reproducibility of the model in a biological environment.
ResultsThe LuxS protein modelling of P. gingivalis strain W83 was developed, which allows the approach to a proposed structure for the interaction between the protein and its natural ligand. The model generated with computational resources achieved the correct position and biological behavior by means of developed calculations. The docking showed a cavity in which the ligand adopted several positions with good results.
ConclusionsA LuxS protein model was obtained, validated by different methods. This generated a 3D model for LuxS protein in P. gingivalis strain W83 with biological reproducibility by means of molecular docking.
Key words:
Protein structural homology
Porphyromonas gingivalis
molecular conformation
gram-negative bacteria
periodontic (Mesh Database)
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