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Se requiere desacetilación de ATG16L1 para la microautofagia lisosómica asociada a LC3

Qian Wang¹, Wei Wan², Hongtao Zhang¹

¹Center for Metabolism Research, International Institutes of Medicine, International School of Medicine and the Fourth Affiliated Hospital of Zhejiang University, Yiwu, China.

|August 25, 2025

Resumen

La desacetilación de ATG16L1 regula la microautofagia, un proceso celular para la eliminación de los desechos. Este hallazgo es crucial para comprender cómo las células mantienen la salud lisosómica durante el estrés.

Área de la Ciencia:

Biología celular
Biología molecular
Investigación de la autofagia

Sus antecedentes:

La microautofagia es una vía clave de degradación celular que involucra la absorción directa de material citoplasmático por parte de los endolisomos.
Los mecanismos reguladores precisos que controlan la microautofagia, en particular la microautofagia asociada a LC3, no están completamente aclarados.
Comprender estos mecanismos es vital para la homeostasis celular y la respuesta al estrés.

Objetivo del estudio:

Investigar los mecanismos reguladores que rigen la microautofagia lisosomal asociada con el LC3.
Identificar las proteínas clave y las modificaciones post-traducionales involucradas en la regulación de la microautofagia.
Aclarar el papel de la modificación de ATG16L1 en la respuesta al estrés lisosomal y la recuperación.

Principales métodos:

Se investigó el papel de la acetilación y desacetilación de ATG16L1 en la microautofagia.
Se utilizaron ensayos bioquímicos para estudiar las interacciones proteína-proteína entre ATG16L1, KAT2B, HDAC3 y V-ATPasa.
Se evaluó el impacto de la desacetilación de ATG16L1 en la lipidación del LC3 y la función lisosómica en condiciones de estrés.

Principales resultados:

Se identificó la desacetilación de ATG16L1 como un regulador crítico de la microautofagia lisosomal asociada con LC3.
Se ha demostrado que KAT2B y HDAC3 controlan dinámicamente la acetilación de ATG16L1.
Se ha demostrado que la desacetilación mediada por HDAC3 promueve la interacción de ATG16L1 con la V-ATPasa, facilitando el reclutamiento lisosomal y la lipidación LC3.
Confirmado que la desacetilación de ATG16L1 es esencial para la recuperación lisosómica después del estrés, restaurando el tamaño y la función.

Conclusiones:

La desacetilación de ATG16L1 es un mecanismo regulador clave en la microautofagia asociada a LC3.
Este proceso es crucial para mantener la homeostasis lisosómica y la función celular bajo estrés.
Los hallazgos revelan un nuevo papel para la modificación post-traducional de ATG16L1 en la autofagia y la adaptación al estrés celular.

Palabras clave:

En el caso de los vehículos de motor, se aplicarán las siguientes disposiciones:Acetilación Lipidación en el LC3 Microautofagia asociada con el LC3 V-ATPasa y sus derivados Los lisosomas

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