LYL1 facilitates AETFC assembly and gene activation by recruiting CARM1 in t(8;21) AML.
LYL1 facilitates AETFC assembly and gene activation by recruiting CARM1 in t(8;21) AML.
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LYL1 通过在 t(8;21) AML 中招募 CARM1 来促进 AETFC 组装和基因激活。
DOI:
10.1073/pnas.2213718119
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发表时间:
2022-10-18
影响因子:
11.1
通讯作者:
Chen, Mo
中科院分区:
文献类型:
--
作者:
Chen, Qian;Cevher, Murat A.;Jiang, Qi;Wang, Saisai;Sun, Xiaojian;Roeder, Robert G.;Chen, Mo
AML1–ETO represents the most common fusion transcription factor in AML. AE forms a unique and stable transcription factor/cofactor complex, designated AETFC, that is critical for leukemogenesis. Although earlier studies have shown the biological importance of AETFC components, how the assembly of AETFC affects gene expression is still unclear. Additionally, the AETFC component, LYL1, has been shown to be critical for the proliferation of other types of leukemia. Thus, understanding how LYL1 contributes to AE-dependent gene expression is important to the broader field of leukemia. Moreover, establishment of a correlation between LYL1- and AE-dependent gene activation can guide discovery of coactivators for AETFC. The potential to target activator–coactivator interactions or enzymatic activities may provide novel therapeutic directions. Transcription factors (TFs) play critical roles in hematopoiesis, and their aberrant expression can lead to various types of leukemia. The t(8;21) leukemogenic fusion protein AML1–ETO (AE) is the most common fusion protein in acute myeloid leukemia and can enhance hematopoietic stem cell renewal while blocking differentiation. A key question in understanding AE-mediated leukemia is what determines the choice of AE to activate self-renewal genes or repress differentiation genes. Toward the resolution of this problem, we earlier showed that AE resides in the stable AETFC complex and that its components colocalize on up- or down-regulated target genes and are essential for leukemogenesis. In the current study, using biochemical and genomic approaches, we show that AE-containing complexes are heterogeneous, and that assembly of the larger AETFC (containing AE, CBFβ, HEB, E2A, LYL1, LMO2, and LDB1) requires LYL1. Furthermore, we provide strong evidence that the LYL1-containing AETFC preferentially binds to active enhancers and promotes AE-dependent gene activation. Moreover, we show that coactivator CARM1 interacts with AETFC and facilitates gene activation by AETFC. Collectively, this study describes a role of oncoprotein LYL1 in AETFC assembly and gene activation by recruiting CARM1 to chromatin for AML cell survival.
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