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LEDGF interacts with the NID domain of MeCP2 and modulates MeCP2 condensates
Structure ( IF 4.4 ) Pub Date : 2024-11-04 , DOI: 10.1016/j.str.2024.10.016
Saskia Lesire, Rodrigo Lata, Yannick Hoogvliets, Kune Herrebosch, Paulien Van De Velde, Anouk Speleers, Frauke Christ, Siska Van Belle, Zeger Debyser

Methyl-CpG-binding protein 2 (MeCP2) is a ubiquitously expressed nuclear protein involved in transcriptional regulation and chromatin remodeling. MeCP2 exists in two isoforms, MeCP2 E1 and E2, which share the same functional domains. Loss-of-function mutations in the MeCP2 gene are the main cause of Rett syndrome (RTT). Previous studies identified a complex formation between MeCP2 and lens epithelium derived growth factor (LEDGF), a transcriptional regulator that exists in two isoforms, LEDGF/p75 and LEDGF/p52. Here, we characterized the molecular and functional interaction between MeCP2 and LEDGF. The NCoR interaction domain (NID) domain in MeCP2 is essential for the direct binding to the PWWP-CR1 region of LEDGF. Introduction of R306C, an RTT mutation in the NID of MeCP2, reduced the interaction with LEDGF. Our data reveal mutual inhibition of MeCP2 and LEDGF multimerization due to overlapping binding sites. Aligning with this observation, LEDGF depletion resulted in larger MeCP2 and DNA foci in NIH3T3 cells, suggesting a role for the MeCP2-LEDGF complex in chromatin organization.

中文翻译:


LEDGF 与 MeCP2 的 NID 结构域相互作用并调节 MeCP2 凝聚物



甲基-CpG 结合蛋白 2 (MeCP2) 是一种普遍表达的核蛋白,参与转录调控和染色质重塑。MeCP2 以 MeCP2 E1 和 E2 两种亚型存在,它们具有相同的功能结构域。MeCP2 基因功能丧失突变是 Rett 综合征 (RTT) 的主要原因。以前的研究确定了 MeCP2 和晶状体上皮衍生生长因子 (LEDGF) 之间的复杂形成,LEDGF 是一种转录调节因子,存在于两种亚型中,即 LEDGF/p75 和 LEDGF/p52。在这里,我们表征了 MeCP2 和 LEDGF 之间的分子和功能相互作用。MeCP2 中的 NCoR 相互作用结构域 (NID) 结构域对于与 LEDGF 的 PWWP-CR1 区域的直接结合至关重要。R306C 的引入是 MeCP2 NID 中的 RTT 突变,减少了与 LEDGF 的相互作用。我们的数据揭示了由于重叠的结合位点,MeCP2 和 LEDGF 多聚化的相互抑制。与这一观察结果一致,LEDGF 耗竭导致 NIH3T3 细胞中更大的 MeCP2 和 DNA 病灶,表明 MeCP2-LEDGF 复合物在染色质组织中发挥作用。
更新日期:2024-11-04
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