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Las quinasas WNK detectan el apiñamiento molecular y el volumen celular de rescate a través de la separación de fases

Cary R Boyd-Shiwarski¹, Daniel J Shiwarski², Shawn E Griffiths³

¹Department of Medicine, Renal-Electrolyte Division, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Pittsburgh Center for Kidney Research, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.

|November 1, 2022

Resumen

Las células deshidratadas utilizan las quinasas WNK para recuperar el volumen. Estas quinasas forman condensados a través de la separación de fase, amplificando las señales para restaurar el volumen celular bajo el apiñamiento molecular.

Área de la Ciencia:

Biología celular
La bioquímica
Biología molecular

Sus antecedentes:

La regulación del volumen celular es crítica para la supervivencia, especialmente durante la deshidratación.
Las quinasas WNK regulan los transportadores SLC12 para la recuperación de volumen, pero su mecanismo de activación no está claro.

Objetivo del estudio:

Para dilucidar el mecanismo de activación de las quinasas WNK en respuesta al encogimiento celular.
Investigar el papel de la formación de condensado WNK1 en la recuperación del volumen celular.

Principales métodos:

Estudió el comportamiento de WNK1 en células expuestas a hipertonicidad.
Se analizó la formación de condensado WNK1 y su dependencia del extremo C intrínsecamente desordenado.
Investigó el papel de la aglomeración molecular en la activación de la kinasa WNK in vivo.

Principales resultados:

WNK1 forma rápidamente condensados sin membrana cuando se presenta un desafío hipertónico.
La formación de condensado WNK1 es impulsada por su extremo C intrínsecamente desordenado.
La formación de condensado, activada por el apiñamiento molecular, amplifica la señalización para la recuperación del volumen celular.

Conclusiones:

Las quinasas WNK actúan como sensores de aglomeración fisiológica.
La separación de fase de WNK1 en condensados es un mecanismo clave para coordinar el rescate del volumen celular.
Este proceso permite el transporte eficiente de iones y la restauración del volumen celular a pesar de las condiciones inhibidoras.

Palabras clave:

Transporte conjunto de K-Cl Transporte conjunto de Na-K-2Cl SLC12 cotransportador La WNK quinasa Condensados biomoleculares regulación del volumen de la célula estrés hiperosmótico Aglomeración macromolecular separación de fases

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