A Role for Histone Deacetylase HDAC1 in Modulating the Transcriptional Activity of MyoD: Inhibition of the Myogenic Program
Overview
Molecular Biology
Authors
Affiliations
The molecular mechanism(s) that are responsible for suppressing MyoD's transcriptional activities in undifferentiated skeletal muscle cells have not yet been determined. We now show that MyoD associates with a histone deacetylase-1 (HDAC1) in these cells and that this interaction is responsible for silencing MyoD-dependent transcription of endogenous p21 as well as muscle-specific genes. Specifically, we present evidence that HDAC1 can bind directly to MyoD and use an acetylated MyoD as a substrate in vitro, whereas a mutant version of HDAC1 (H141A) can not. Further more, this mutant also fails to repress MyoD-mediated transcription in vivo, and unlike wild-type HDAC1 it can not inhibit myogenic conversion, as judged by confocal microscopy. Finally, we show that an endogenous MyoD can be acetylated upon its conversion to a hypophosphorylated state and only when the cells have been induced to differentiate. These results provide for a model which postulates that MyoD may be co-dependent on HDAC1 and P/CAF for temporally controlling its transcriptional activity before and after the differentiation of muscle cells.
E-box independent chromatin recruitment turns MYOD into a transcriptional repressor.
Nicoletti C, Massenet J, Pintado-Urbanc A, Connor L, Nicolau M, Sundar S bioRxiv. 2024; .
PMID: 39677796 PMC: 11643108. DOI: 10.1101/2024.12.05.627024.
Emerging role of HDAC11 in skeletal muscle biology.
Chen J, Li Q Front Cell Dev Biol. 2024; 12:1368171.
PMID: 38859964 PMC: 11163118. DOI: 10.3389/fcell.2024.1368171.
Mozzetta C, Sartorelli V, Steinkuhler C, Puri P Trends Mol Med. 2024; 30(3):278-294.
PMID: 38408879 PMC: 11095976. DOI: 10.1016/j.molmed.2024.01.007.
The Current Landscape of Pharmacotherapies for Sarcopenia.
Bahat G, Ozkok S Drugs Aging. 2024; 41(2):83-112.
PMID: 38315328 DOI: 10.1007/s40266-023-01093-7.
Integrated Transcriptome Analysis of miRNAs and mRNAs in the Skeletal Muscle of Wuranke Sheep.
Yun Y, Wu R, He X, Qin X, Chen L, Sha L Genes (Basel). 2023; 14(11).
PMID: 38002977 PMC: 10671749. DOI: 10.3390/genes14112034.