ZNF750 interacts with KLF4 and RCOR1, KDM1A, and CTBP1/2 chromatin regulators to repress epidermal progenitor genes and induce differentiation genes

LD Boxer, B Barajas, S Tao, J Zhang… - Genes & …, 2014 - genesdev.cshlp.org
LD Boxer, B Barajas, S Tao, J Zhang, PA Khavari
Genes & development, 2014genesdev.cshlp.org
ZNF750 controls epithelial homeostasis by inhibiting progenitor genes while inducing
differentiation genes, a role underscored by pathogenic ZNF750 mutations in cancer and
psoriasis. How ZNF750 accomplishes these dual gene regulatory impacts is unknown. Here,
we characterized ZNF750 as a transcription factor that binds both the progenitor and
differentiation genes that it controls at a CCNNAGGC DNA motif. ZNF750 interacts with the
pluripotency transcription factor KLF4 and chromatin regulators RCOR1, KDM1A, and …
ZNF750 controls epithelial homeostasis by inhibiting progenitor genes while inducing differentiation genes, a role underscored by pathogenic ZNF750 mutations in cancer and psoriasis. How ZNF750 accomplishes these dual gene regulatory impacts is unknown. Here, we characterized ZNF750 as a transcription factor that binds both the progenitor and differentiation genes that it controls at a CCNNAGGC DNA motif. ZNF750 interacts with the pluripotency transcription factor KLF4 and chromatin regulators RCOR1, KDM1A, and CTBP1/2 through conserved PLNLS sequences. ChIP-seq (chromatin immunoprecipitation [ChIP] followed by high-throughput sequencing) and gene depletion revealed that KLF4 colocalizes ∼10 base pairs from ZNF750 at differentiation target genes to facilitate their activation but is unnecessary for ZNF750-mediated progenitor gene repression. In contrast, KDM1A colocalizes with ZNF750 at progenitor genes and facilitates their repression but is unnecessary for ZNF750-driven differentiation. ZNF750 thus controls differentiation in concert with RCOR1 and CTBP1/2 by acting with either KDM1A to repress progenitor genes or KLF4 to induce differentiation genes.
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