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Ligadura de tetrazina: bioconjugación rápida basada en la reactividad inversa de demanda de electrones de Diels-Alder

Melissa L Blackman¹, Maksim Royzen, Joseph M Fox

¹Brown Laboratories, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.

Journal of the American Chemical Society

|September 19, 2008

Resumen

Una nueva reacción bioortogonal entre los derivados de s-tetrazina y trans-ciclocteno ofrece una rápida cycloadición sin catalizadores. Este eficiente método de bioconjugación funciona en diversos entornos y permite la modificación de proteínas a bajas concentraciones.

Área de la Ciencia:

Biología Química Biología química.
Química orgánica es la química orgánica.
La bioquímica es la bioquímica.

Sus antecedentes:

Las reacciones bioortogonales son cruciales para el estudio de los sistemas biológicos in situ.
Las químicas bioortogonales existentes a menudo requieren catalizadores o exhiben una cinética más lenta.
Se necesitan estrategias de ligadura bioortogonal más rápidas y eficientes.

Objetivo del estudio:

Para describir una nueva reacción bioortogonal altamente reactiva.
Demostrar la utilidad de la cicloadición de s-tetrazina y trans-ciclocteno para la bioconjugación.
Para resaltar la aplicabilidad de la reacción en diversas condiciones biológicas.

Principales métodos:

Investigó la reacción de cicloadición entre los derivados de s-tetrazina y los derivados de trans-ciclocteno.
Cinética de reacción cuantificada, específicamente la tasa de ligadura entre el transciclocteno y la 3,6-di-(2-piridil) -s-tetrazina.
Evalúa el rendimiento de la reacción en varios disolventes, incluidos los medios acuosos y el lisado celular.

Principales resultados:

La cicloadición procede con velocidades de reacción excepcionalmente rápidas (k2 = 2000 M-1 s-1) sin necesidad de catálisis.
La reacción demuestra una amplia tolerancia del grupo funcional.
Se lograron altos rendimientos en disolventes orgánicos, agua, medios celulares y lisado celular.

Conclusiones:

La cicloadición de s-tetrazina y trans-ciclocteno representa un avance significativo en la química bioortogonal.
Su rápida cinética y su compatibilidad con los entornos biológicos permiten una eficiente modificación de proteínas.
Esta reacción ofrece una poderosa herramienta para la biología química y el desarrollo de fármacos.

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