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Updated: Jan 25, 2026

Production, Crystallization, and Structure Determination of the IKK-binding Domain of NEMO

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Conocimientos estructurales sobre tres síntases bifuncionales de sesterterpenos e investigación del perfil del

Zhenyu Lei¹, Ruiqing Lyu², Wenlong Song¹

¹State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Haidian District, Beijing 100191, China.

Journal of the American Chemical Society

|January 23, 2026

Resumen

Los investigadores descubrieron nuevas estructuras de terpenas sintasas bifuncionales (TS) involucradas en la producción de sesterterpenos. Estos hallazgos revelan nuevas arquitecturas y funciones enzimáticas, ayudando en el diseño de nuevas moléculas de terpenos.

Área de la Ciencia:

La bioquímica
Biología estructural
Enzimología

Sus antecedentes:

Las terpenas sintasas (TSs) crean diversos esqueletos de hidrocarburos a partir de poliisopreno difosfatos.
Algunos TSs son bifuncionales, poseen ambos dominios preniltransferasa (PT) y terpene ciclasa (TC).
No existían datos estructurales para las sesterterenas sintasas bifuncionales PT-TC (StTS) antes de este estudio.

Objetivo del estudio:

Para determinar las estructuras cryo-EM de tres StTS de longitud completa.
Investigar las bases estructurales de las interacciones PT-TC y su impacto en la biosíntesis de terpenos.
Explorar la función catalítica y la diversidad estructural de los StTS.

Principales métodos:

Microscopía cryoelectrónica (cryo-EM) para las estructuras StTS de longitud completa.
Cristalografía de rayos X para el dominio TC de EvAS.
Experimentos de intercambio de dominio y mutagenesis dirigida al sitio.

Principales resultados:

Se han revelado distintas arquitecturas de hexamerización impulsadas por PT para EvAS, EvSS y PbSS.
EvSS exhibe una arquitectura tubular hueca helicoidal apilada con hexámero PT.
El intercambio de dominios demostró la influencia de PT en los rendimientos y tipos de productos TC.
Se han identificado estructuras secundarias clave en el dominio EvAS TC que afectan a la ciclización.
Generó siete nuevos compuestos de sesterterpenos a través de la mutagénesis del sitio activo.

Conclusiones:

Descubrió nuevas arquitecturas estructurales de StTS bifuncionales.
Comprensión ampliada de la transferencia de sustrato y los mecanismos catalíticos en la biosíntesis de terpenos.
Proporcionó ideas para la ingeniería racional de pares PT-TC para la generación de terpenos.

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