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Real Time Measurements of Membrane Protein:Receptor Interactions Using Surface Plasmon Resonance (SPR)
Published on: November 29, 2014
Impacto de la longitud del lazo del polímero en la formación de enlaces múltiples ligando-receptor
C Jeppesen1, J Y Wong, T L Kuhl
1Materials Research Laboratory, Department of Chemical Engineering, University of California, Santa Barbara, CA 93106, USA.
Science (New York, N.Y.)
|July 21, 2001
Resumen
La eficiencia de la adhesión celular se basa en las conformaciones raras de la cadena de polímero extendida, no solo en las propiedades de unión molecular. Este hallazgo impacta la comprensión de las interacciones celulares y los biomateriales.
Área de la Ciencia:
- La biofísica es la biofísica.
- Ciencia de los materiales Ciencia de los materiales.
- Biología celular Biología celular.
Sus antecedentes:
- La adhesión celular está mediada por ligandos en cables flexibles que se unen a los receptores de superficie.
- Comprender la dinámica de estas ataduras es crucial para los estudios de interacción celular.
Objetivo del estudio:
- Para cuantificar la dinámica de la cadena de polímeros y la cinética de unión ligando-receptor.
- Para determinar el rango espacial y la eficiencia de las interacciones ligando-receptor atadas.
Principales métodos:
- Simulaciones de Monte Carlo en las simulaciones de Monte Carlo.
- Teoría de la reacción de difusión.
- Las mediciones de la fuerza superficial (sistema de biotina-streptavidina)
Principales resultados:
- Se cuantificaron la dinámica de la cadena de polímeros y la cinética de unión.
- La eficiencia de unión depende críticamente de las conformaciones raras y extendidas del polímero.
- La arquitectura molecular y la configuración de la cuerda de equilibrio son menos críticas que las conformaciones raras.
Conclusiones:
- Las "raras" conformaciones extendidas de los tethers de polímero son la clave para una adhesión celular eficiente.
- Esto proporciona nuevos conocimientos sobre la biofísica de las interacciones moleculares en las superficies celulares.
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