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- W4366670709 abstract "NPAC is a transcriptional co-activator widely associated with the H3K36me3 epigenetic marks present in the gene bodies. NPAC plays a fundamental role in RNA polymerase progression, and its depletion downregulates gene transcription. In this chapter, we review the current knowledge on the functional and structural features of this multi-domain protein. NPAC (also named GLYR1 or NP60) contains a PWWP motif, a chromatin binder and epigenetic reader that is proposed to weaken the DNA-histone contacts facilitating polymerase passage through the nucleosomes. The C-terminus of NPAC is a catalytically inactive dehydrogenase domain that forms a stable and rigid tetramer acting as an oligomerization module for the formation of co-transcriptional multimeric complexes. The PWWP and dehydrogenase domains are connected by a long, mostly disordered, linker that comprises putative sites for protein and DNA interactions. A short dodecapeptide sequence (residues 214-225) forms the binding site for LSD2, a flavin-dependent lysine-specific histone demethylase. This stretch of residues binds on the surface of LSD2 and facilitates the capture and processing of the H3 tail in the nucleosome context, thus promoting the H3K4me1/2 epigenetic mark removal. LSD2 is associated with other two chromatin modifiers, G9a and NSD3. The LSD2-G9a-NSD3 complex modifies the pattern of the post translational modifications deposited on histones, thus converting the relaxed chromatin into a transcriptionally refractory state after the RNA polymerase passage. NPAC is a scaffolding factor that organizes and coordinates the epigenetic activities required for optimal transcription elongation." @default.
- W4366670709 created "2023-04-23" @default.
- W4366670709 creator A5016263213 @default.
- W4366670709 creator A5017449175 @default.
- W4366670709 date "2023-01-01" @default.
- W4366670709 modified "2023-09-27" @default.
- W4366670709 title "The NPAC-LSD2 complex in nucleosome demethylation" @default.
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- W4366670709 doi "https://doi.org/10.1016/bs.enz.2023.03.003" @default.
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