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Explotación de la diversidad estructural y reguladora en las racemasas de glutamato
Tomas Lundqvist1, Stewart L Fisher, Gunther Kern
1AstraZeneca Global Structural Chemistry, AstraZeneca R&D Mölndal, SE-431 83, Mölndal, Sweden.
Nature
|June 15, 2007
Resumen
La racemasa del glutamato, crucial para las paredes celulares bacterianas, muestra una regulación variada. Los nuevos inhibidores dirigidos a la glutamato racemasa de Helicobacter pylori ofrecen potencial para fármacos antibacterianos de espectro estrecho.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología Estructural Biología estructural.
- Microbiología Microbiología.
Sus antecedentes:
- El glutamato racemasa es vital para la síntesis de la pared celular bacteriana.
- Es un objetivo potencial para el desarrollo de nuevos medicamentos antibacterianos.
Objetivo del estudio:
- Para caracterizar las racemasas de glutamato de las bacterias patógenas.
- Para entender sus mecanismos reguladores.
- Para identificar inhibidores selectivos para el descubrimiento de fármacos.
Principales métodos:
- Análisis estructurales y bioquímicos de las racemasas de glutamato.
- Identificación y caracterización de inhibidores no competitivos.
- Cinética de las enzimas y estudios mutacionales.
Principales resultados:
- Descubrió tres mecanismos reguladores distintos: la activación alostérica, la inhibición del sustrato y el reciclaje del D-glutamato.
- Se han identificado inhibidores específicos no competitivos de la racemasa de glutamato de Helicobacter pylori que se unen a un sitio alostérico críptico.
- Elucidación de la dinámica enzimática y las características mecánicas a través de estudios de inhibidores.
Conclusiones:
- Los hallazgos proporcionan información sobre la regulación fisiológica de las racemasas de glutamato.
- Este trabajo sienta las bases para el diseño de agentes antibacterianos de espectro estrecho y dirigidos.
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