Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.7.7.6 (RNA polymerase)
 34,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Uncontrolled self-renewal of hematopoietic progenitors induces leukemia. To self-renew, leukemia cells must continuously activate genes that were previously active in their mother cells. Here, we describe the circuitry of a transactivation system responsible for oncogenic self-renewal. MLL recruits RNA polymerase II (RNAP2) to unmethylated CpG-rich promoters by its CXXC domain and activates transcription by transcriptional regulators, including the AF4 family/ENL family/P-TEFb complex, DOT1L, and p300/CBP histone acetyl transferases. MOZ also targets a broad range of CpG-rich promoters through association with RNAP2 and MLL. Leukemic fusion proteins such as MOZ-TIF2 and MLL-AFX constitutively activate CpG-rich promoters by aberrantly recruiting p300/CBP. Pharmacological inhibition of MLL or DOT1L induces differentiation of MOZ-TIF2-transformed cells. These results reveal that activation of unmethylated CpG-rich promoters mediated by MLL is the central mechanism of oncogenic self-renewal in MOZ-rearranged leukemia and indicate that the molecularly targeted therapies intended for MLL-rearranged leukemia can be applied for MOZ-rearranged leukemia.
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PMID:Activation of CpG-Rich Promoters Mediated by MLL Drives MOZ-Rearranged Leukemia. 3299 97


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