Spleen tyrosine kinase(SYK)is a non-receptor tyrosine kinase,which plays an essential role in both innate and adaptive immunity.However,the key molecular mechanisms that regulate SYK activity are poorly understood.Her...Spleen tyrosine kinase(SYK)is a non-receptor tyrosine kinase,which plays an essential role in both innate and adaptive immunity.However,the key molecular mechanisms that regulate SYK activity are poorly understood.Here we identified the E3 ligase TRIM31 as a crucial regulator of SYK activation.We found that TRIM31 interacted with SYK and catalyzed K27-linked polyubiquitination at Lys375 and Lys517 of SYK.This K27-linked polyubiquitination of SYK promoted its plasma membrane translocation and binding with the C-type lectin receptors(CLRs).展开更多
基金This work was supported by grants from the National Natural Science Foundation of China(81930039,31730026,81525012)the Key Research and Development Projects of Shandong Province(2019GSF108133).
文摘Spleen tyrosine kinase(SYK)is a non-receptor tyrosine kinase,which plays an essential role in both innate and adaptive immunity.However,the key molecular mechanisms that regulate SYK activity are poorly understood.Here we identified the E3 ligase TRIM31 as a crucial regulator of SYK activation.We found that TRIM31 interacted with SYK and catalyzed K27-linked polyubiquitination at Lys375 and Lys517 of SYK.This K27-linked polyubiquitination of SYK promoted its plasma membrane translocation and binding with the C-type lectin receptors(CLRs).
