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BCL6 as a therapeutic target for lymphoma
Published in Expert Opinion on Therapeutic Targets, 2018
Rebecca J Leeman-Neill, Govind Bhagat
BCL6 belongs to the Broad-Complex, Tramtrack and Bric a brac/Pox virus and Zinc Finger (BTB/POZ) family of transcription factors that functions as a transcriptional repressor. The C terminus contains C2H2 zinc finger domains that interact with DNA, allowing BCL6 to bind and repress its target genes. The N terminus contains a BTB/POZ domain that, upon homo-dimerization of BCL6 molecules, recruits additional corepressor molecules and forms a multi-molecular complex with SMRT and NCOR or BCOR [6–8]. The middle part of the protein contains an additional repressor domain, RD2 [6,9] (Figure 1). The BCL6 interactome is vast and BCL6 can interact with and influence the function of myriad proteins either directly or indirectly. Co-immunoprecipitation and liquid chromatography–mass spectrometry (LC–MS) studies have identified numerous BCL6 interacting proteins, which comprise transcription factors (including transcriptional corepressors), signaling mediators, catalytic enzymes, and others [10].