Neurogenin-2 (Ngn-2) is a member of the neurogenin subfamily of basic helix-loop-helix (bHLH) transcription factors that play an important role in neurogenesis from migratory neural crest cells (1). In particular, it is critical for the differentiation and survival of midbrain dopaminergic neurons (2). Neurogenin-2, in collaboration with extrinsic signal retinoic acid (RA), triggers transcriptionally active chromatin in spinal motor neurons during development (3). Neurogenin-2 is bound by Retinoic acid receptor (RAR), and RAR is thereby recruited to motor neuron genes targeted by Neurogenin-2 (3). RA then facilitates the recruitment of a histone acetyltransferase CBP to the Neurogenin-2/RAR-complex, markedly inducing histone H3/H4-acetylation (3).
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