| 1991 |
MyoD contains a basic-helix-loop-helix (bHLH) domain of 68 amino acids that is necessary and sufficient for myogenic conversion; the helix-loop-helix motif mediates dimerization, while the basic region mediates DNA binding to muscle-specific enhancers, and MyoD activates its own transcription through positive autoregulation. |
Deletion/chimeric mutagenesis, transient transfection, DNA-binding assays, cell conversion assays |
Science |
High |
1846704
|
| 1989 |
MyoD1 positively autoregulates its own transcription and engages in a mutual positive feedback loop with myogenin; MyoD1 activates endogenous MyoD1 mRNA and myogenin expression, and myogenin reciprocally activates MyoD1 expression upon transfection. |
cDNA transfection into 10T1/2 and Swiss 3T6 cells, Northern blot analysis of endogenous gene activation |
Cell |
High |
2546677
|
| 1991 |
MyoD transcriptional activation requires a specific alanine in the basic region for increased DNA binding and a specific threonine for transcriptional activation; the activation domain maps to the amino-terminal 53 residues and is normally masked by the rest of the molecule, requiring a basic-region-recognizing 'recognition factor' for activity. |
Back-mutation of MyoD-E12Basic chimera, reporter gene assays, VP16 domain swap, cotransfection in multiple cell lines |
Genes & development |
High |
1651276
|
| 1992 |
c-Jun physically interacts with MyoD both in vivo and in vitro, with the leucine zipper domain of Jun contacting the helix-loop-helix region of MyoD; this interaction mediates mutual transcriptional antagonism — Jun inhibits MyoD transactivation of muscle genes and MyoD inhibits Jun transactivation of AP-1 target genes. |
Co-immunoprecipitation (in vivo), in vitro binding assays, transient transfection reporter assays, mutational analysis |
Cell |
High |
1310896
|
| 1992 |
c-Fos, c-Jun, and JunB (but not JunD) repress MyoD- and myogenin-mediated transactivation of muscle creatine kinase enhancer by targeting the basic-HLH region of myogenic factors; repression can be mediated through the amino terminus of c-Jun and is specific to myogenic HLH proteins, not the widely expressed E47. |
Transient transfection reporter assays, myogenin deletion mutant analysis, comparison of Jun family members |
Genes & development |
High |
1313772
|
| 1990 |
MyoD1 inhibits cell proliferation independently of myogenic differentiation; deletion of the myc-like domain eliminates inhibition of DNA synthesis, while substitution of the basic domain with E12 basic domain inhibits growth but fails to induce differentiation, demonstrating that cell cycle arrest and differentiation are controlled by separable MyoD domains. |
Microinjection of MyoD1 expression constructs into NIH 3T3 cells, deletion/chimeric mutagenesis, DNA synthesis measurement |
Nature |
High |
2359457
|
| 1989 |
Activated Ras inhibits myogenic differentiation by suppressing expression of MyoD1 and myogenin; forced retroviral expression of MyoD1 in ras-transformed myoblasts restores both terminal differentiation markers and lineage markers, placing Ras upstream of MyoD1. |
Retroviral transformation, retroviral MyoD1 re-expression, Northern blot, epistasis analysis |
Cell |
High |
2548731
|
| 2006 |
MyoD directly activates transcription of the muscle-specific microRNA miR-206, which then targets the 3'UTR sequences of Fstl1 and Utrn mRNAs to suppress their expression during skeletal muscle differentiation, revealing an indirect suppression mechanism for MyoD. |
Chromatin immunoprecipitation, reporter assays with 3'UTR constructs, fibroblast-to-muscle conversion by MyoD |
The Journal of cell biology |
High |
17030984
|
| 2012 |
MyoD1 is required for assembly of condition-specific muscle enhancers genome-wide; MyoD1-null myoblasts show loss of H3K4me1, H3K27ac, and recruitment of Set7 (H3K4 monomethylase) and other transcription factors at enhancers, and MyoD1 re-expression restores H3K4me1 (and H3K27ac in myotubes), defining MyoD1 as a genome-wide enhancer organizer. |
Chromatin state mapping (ChIP-seq for histone modifications), MyoD1-null myoblasts, re-expression of MyoD1, genome-wide analysis |
Genes & development |
High |
23249738
|
| 2005 |
MyoD is functionally distinct from Myf5 in inducing differentiation-phase target genes; a novel cooperation between MyoD NH2- and COOH-terminal regions (absent in Myf5) underlies this distinction, as revealed by microarray-based gene expression analysis with domain-swap mutants. |
Microarray gene expression profiling, PCR, in vitro myoblast differentiation model with MyoD/Myf5 domain mutants |
The Journal of cell biology |
High |
16275751
|
| 2000 |
MyoD is acetylated by both CBP/p300 and PCAF on two lysines at the boundary of the DNA-binding domain; acetylation by either enzyme increases MyoD transcriptional activity on muscle-specific promoters, and MyoD mutants that cannot be acetylated in vitro are not activated in functional assays. |
In vitro acetylation assays, microinjection functional assays, site-directed mutagenesis of acetylation sites |
The Journal of biological chemistry |
High |
10944526
|
| 2001 |
MyoD is degraded by the ubiquitin-proteasome system in the nucleus; nuclear HeLa nucleoplasm supports MyoD ubiquitination and proteasomal degradation in vitro, and leptomycin B treatment (blocking nuclear export) confirms nuclear degradation in vivo. |
In vitro degradation assay using purified HeLa nucleoplasm, proteasome inhibitors, leptomycin B nuclear export blockade |
The Journal of biological chemistry |
High |
11309375
|
| 2002 |
MyoD is preferentially ubiquitinated on its N-terminus for proteasomal degradation (N-terminus-dependent pathway); nuclear localization signal and nuclear export signal modifications restrict ubiquitination to specific compartments, revealing that the lysine-dependent pathway predominates in the cytoplasm while both pathways are active in the nucleus. |
In vitro ubiquitination assays, site-directed mutagenesis of N-terminus and NLS/NES, subcellular fractionation |
The Journal of biological chemistry |
High |
12397066
|
| 2012 |
HUWE1 E3 ubiquitin ligase ubiquitinates MyoD at its N-terminal residue, targeting it for proteasomal degradation. |
In vitro ubiquitination assay, co-immunoprecipitation, proteasome inhibitor treatment |
Biochemical and biophysical research communications |
Medium |
22277673
|
| 2000 |
p57(Kip2) directly binds MyoD through its NH2-terminal intermediate alpha-helix domain interacting with the basic helix-loop-helix region of MyoD; this interaction (independent of Cdk-inhibitory activity) stabilizes MyoD protein by increasing its half-life and enhancing its transcriptional activity on muscle-specific genes. |
Cross-immunoprecipitation of endogenous proteins, competition/association assays, site-directed mutagenesis, half-life measurement by pulse-chase, transactivation assays |
The Journal of biological chemistry |
High |
10764802
|
| 2002 |
Cdk9/cyclin T2 complex directly interacts with MyoD (mapping to amino acids 101-161 in the bHLH region), can phosphorylate MyoD in vitro, and activates MyoD-dependent transcription and myogenic differentiation; cdk9 dominant-negative represses the myogenic program. |
Co-immunoprecipitation, in vitro kinase assay, overexpression/dominant-negative experiments, reporter gene assays |
Oncogene |
High |
12037670
|
| 1993 |
Phosphorylated MyoD homodimers fail to bind DNA whereas MyoD-E12 heterodimers are unaffected by phosphorylation; cellular phosphorylation shifts the homodimer-heterodimer equilibrium, modulating binding site competition in muscle cells. |
Baculovirus expression of MyoD, in vitro dephosphorylation, gel mobility shift/EMSA, comparison with immunoaffinity-purified native protein |
The Journal of biological chemistry |
High |
8226992
|
| 1998 |
MyoD bHLH domain is intrinsically unfolded and monomeric in solution without DNA; E47 forms stable homodimers off DNA. In the presence of specific DNA, MyoD and E47 form almost exclusively heterodimers, driven by favorable DNA contacts rather than protein-protein affinity, revealing a DNA-mediated folding and assembly mechanism for bHLH heterodimer formation. |
Fluorescence quenching, equilibrium sedimentation, gel shift/EMSA, loop-swap mutagenesis between MyoD and E47 |
The Journal of biological chemistry |
High |
9488706
|
| 2015 |
KAP1/TRIM28 acts as a scaffold at MyoD/Mef2 target muscle gene promoters in myoblasts, recruiting both coactivators (p300, LSD1) and corepressors (G9a, HDAC1) to maintain gene silencing; upon differentiation cue, MSK1-mediated phosphorylation of KAP1 releases corepressors, unleashing MyoD/Mef2 transcriptional activation. |
ChIP-seq, co-immunoprecipitation, MSK1 kinase assay, myoblast differentiation assays |
Genes & development |
High |
25737281
|
| 2008 |
FoxO3 and Pax3/7 form a codependent transcriptional partnership to directly activate MyoD transcription in myoblasts; in vitro studies show they cooperate to recruit RNA polymerase II and form a preinitiation complex at the MyoD locus, and FoxO3-null mice display impaired muscle regeneration with reduced MyoD. |
Cell-based transcriptional assays, in vitro preinitiation complex assembly, FoxO3 knockout mouse analysis, chromatin immunoprecipitation |
Developmental cell |
High |
18854138
|
| 1995 |
MSX1 homeobox protein directly binds the MyoD enhancer and represses MyoD transcription; chromosome 4-mediated inhibition of MyoD activation in fibroblast hybrids is attributed to MSX1, and antisense MSX1 relieves this repression. |
Somatic cell hybrid analysis, enhancer/promoter reporter assays, gel shift/EMSA showing MSX1 binding to MyoD enhancer, antisense MSX1 rescue |
Cell |
High |
7664340
|
| 2017 |
Linc-RAM lncRNA directly binds MyoD protein and promotes assembly of the MyoD-Baf60c-Brg1 chromatin remodeling complex on regulatory elements of myogenic target genes to activate their expression; Linc-RAM knockout mice show impaired satellite cell differentiation and muscle regeneration. |
RNA pulldown/RIP, co-immunoprecipitation, Linc-RAM knockout mice, muscle regeneration assays |
Nature communications |
High |
28091529
|
| 2017 |
In proliferating myoblasts, Malat1 lncRNA recruits the histone methyltransferase Suv39h1 to MyoD-binding loci, causing H3K9me3 trimethylation and repressing target gene expression; upon differentiation, miR-181a-mediated degradation of Malat1 destabilizes the Suv39h1/HP1β/HDAC1 repressive complex and allows a Set7-containing activating complex to displace it, permitting MyoD transactivation. |
RNA pulldown, ChIP-seq, knockdown/knockout models, miRNA overexpression, Malat1 KO mice, mdx dystrophic mice |
Cell discovery |
High |
28326190
|
| 2004 |
Prohibitin 2 (PHB2) directly interacts with MyoD and MEF2 through its central region (aa 120-232), recruits HDAC1, and represses MyoD- and MEF2-dependent transcription; Akt binds PHB2 and partially reduces PHB2-MyoD binding, relieving transcriptional repression and promoting muscle differentiation. |
Yeast two-hybrid, co-immunoprecipitation, GST pulldown, reporter assays, stable cell line overexpression |
Journal of cell science |
High |
15173318
|
| 2010 |
TAZ (transcriptional coactivator with PDZ-binding motif) physically interacts with MyoD through its WW domain, enhances MyoD binding to the myogenin gene promoter, and activates MyoD-dependent transcription to promote myogenic differentiation. |
Co-immunoprecipitation, reporter assays, chromatin immunoprecipitation, overexpression/knockdown in myoblasts and fibroblasts |
FASEB journal |
High |
20466877
|
| 2003 |
STAT3 directly interacts with MyoD, inhibiting its DNA-binding and transcriptional activities; reciprocally, MyoD inhibits STAT3 DNA-binding activity. The STAT3-mediated inhibition of MyoD transcriptional activity can be restored by excess p300/CBP and PCAF, suggesting STAT3 competes for these coactivators. |
Co-immunoprecipitation, EMSA (DNA-binding assay), reporter assays, C2C12 cell differentiation assays |
The Journal of biological chemistry |
High |
12947115
|
| 2008 |
Beta-catenin directly interacts with MyoD and enhances its binding to E-box elements and transcriptional activity; beta-catenin deficiency inhibits MyoD-mediated transactivation in muscle cells, identifying MyoD as a direct effector in the Wnt canonical pathway independent of TCF/LEF. |
Co-immunoprecipitation, EMSA, reporter assays, beta-catenin knockdown in muscle cells |
Molecular and cellular biology |
High |
18316399
|
| 2007 |
FHL3 directly binds MyoD (shown by GST pulldown and co-localization in myoblast nuclei) and functions as a potent negative co-transcriptional regulator; FHL3 overexpression impairs MyoD transcriptional activity and myotube formation, while FHL3 siRNA knockdown enhances MyoD transcriptional activity and differentiation. |
GST pulldown, confocal co-localization, siRNA knockdown, reporter assays, C2C12 differentiation |
Journal of cell science |
High |
17389685
|
| 2017 |
Staufen1 interacts with the 3'UTR of MyoD mRNA and represses its translation in quiescent muscle stem cells (MuSCs); Staufen1+/- mice show elevated MyoD protein (without increased mRNA), exit quiescence, and proliferate; conversely, blocking MyoD translation maintains quiescence. |
Single-molecule FISH, RNA pulldown, co-staining in vivo, Staufen1 heterozygous mouse model, MyoD protein/mRNA quantification |
Proceedings of the National Academy of Sciences |
High |
29073096
|
| 2017 |
Mettl3 (m6A RNA methyltransferase) is required for MyoD mRNA stability in proliferating myoblasts; Mettl3 knockdown specifically downregulates processed (but not pre-) MyoD mRNA, and m6A modification sites are identified in the 5'UTR of MyoD mRNA which is required for proper mRNA processing. |
m6A-seq, siRNA knockdown, RT-qPCR of processed vs. unprocessed MyoD mRNA, 5'UTR deletion analysis |
Open biology |
Medium |
28878038
|
| 2023 |
MyoD-family inhibitor proteins MDFIC and MDFI physically interact with PIEZO1/2 mechanosensitive channels as auxiliary subunits; cryo-EM mapping shows that a lipidated C-terminal helix of MDFIC inserts laterally into the PIEZO1 pore module, regulating channel inactivation kinetics. |
Co-immunoprecipitation, single-particle cryo-EM structure, electrophysiology (channel inactivation assay) |
Science |
High |
37590348
|
| 2015 |
Conversion of MyoD's DNA-binding specificity toward NeuroD2 private sites (CAGATG) plus elimination of MyoD interaction with PBX/MEIS co-factors (via point mutations) is sufficient to convert MyoD from a master myogenic regulator to a master neurogenic regulator, demonstrating that private-site binding specificity and PBX/MEIS cooperative binding together determine muscle lineage specification. |
Chimeric MyoD-NeuroD2 DNA-binding domain mutations, ChIP-seq, gene expression analysis, cell conversion assays in fibroblasts |
Cell reports |
High |
25801030
|
| 1993 |
A cellular factor (heat- and protease-sensitive, non-ATP-dependent) specifically enables DNA binding of MyoD-E47 heterodimers, which fail to bind DNA when reconstituted from purified components; this factor also stimulates MyoD and E47 homodimer DNA binding in a sequence-context-dependent manner. |
In vitro reconstitution with purified proteins, cell extract fractionation, gel mobility shift/EMSA, heat/protease sensitivity tests |
Proceedings of the National Academy of Sciences |
High |
8393567
|
| 2010 |
HIRA (replication-independent histone chaperone) and Asf1a mediate H3.3 incorporation at the MyoD gene promoter and upstream regulatory regions; this replication-independent histone deposition is required for epigenetic transition to permissive chromatin enabling RNA pol II recruitment for MyoD activation during myogenic differentiation. |
ChIP for HIRA, Asf1a, and H3.3; siRNA knockdown of HIRA; muscle differentiation assays |
Proceedings of the National Academy of Sciences |
High |
21173268
|
| 2017 |
LSD1/KDM1a histone demethylase is recruited to the MyoD core enhancer upon differentiation, removes H3K9 methylation, and enables RNA polymerase II recruitment for transcription of the core enhancer non-coding RNA (CEeRNA), which is required for MyoD expression; Lsd1 conditional inactivation in muscle progenitors delays MyoD expression during embryogenesis. |
ChIP, Lsd1 conditional knockout mice, enhancer RNA detection, myoblast siRNA knockdown |
Cell reports |
High |
28228264
|
| 2015 |
G9a methyltransferase methylates MyoD and targets it for ubiquitin-mediated degradation via the Cul4/Ddb1/Dcaf1 E3 ligase pathway; Jmjd2C demethylase directly associates with MyoD in vitro and in vivo to remove this methyl mark and stabilize MyoD, increasing its transcriptional activity and promoting muscle differentiation. |
Co-immunoprecipitation, in vitro demethylation assay, ubiquitination assay, half-life measurement, myogenic conversion assay, ChIP |
Biochimica et biophysica acta |
High |
26149774
|
| 2022 |
MyoD functions as a 3D genome organizer in muscle cells; MyoD-null mice show loss of muscle-specific chromatin loops, and H3K27ac alone is insufficient to establish MyoD-induced chromatin loops, establishing MyoD as a lineage-specific regulator of 3D genome architecture. |
Hi-C (3D genome mapping), ChIP-seq (H3K27ac), MyoD-knockout mouse cells, ChIA-PET analysis |
Nature communications |
High |
35017543
|
| 2008 |
HP1alpha and HP1beta (but not HP1gamma) directly interact with MyoD protein in myoblasts, inhibit MyoD transcriptional activity, and are preferentially recruited to MyoD target gene promoters in proliferating myoblasts to maintain their silenced state; modulation of HP1 levels impairs MyoD target gene expression and terminal differentiation. |
In vitro binding with recombinant proteins, co-immunoprecipitation, reporter assays, ChIP, HP1 overexpression/knockdown |
The Journal of biological chemistry |
High |
18599480
|
| 2007 |
Pbx homeodomain proteins are required for MyoD to induce fast-muscle gene expression (including myogenin and fast-muscle markers) in zebrafish somites; Pbx marks promoters of a subset of MyoD target genes and Pbx loss selectively prevents MyoD-driven fast-muscle but not slow-muscle gene expression, demonstrating that homeodomain co-factors direct bHLH lineage specification. |
Morpholino knockdown in zebrafish, genetic epistasis (Pbx+Myod double knockdown vs. Myf5+Pbx), in situ hybridization for muscle markers |
Development |
High |
17699609
|
| 2020 |
MyoD is the key molecular switch required for Myomixer and Myomaker expression in human myoblasts; MyoD directly binds E-box motifs on the Myomixer and Myomaker promoters to induce their expression, which is required and sufficient to initiate myoblast fusion and multinucleation. |
CRISPR mutagenesis of MyoD, biochemical promoter assays (E-box identification), ChIP, fusion assays in human primary myoblasts |
Science advances |
High |
33355126
|
| 2000 |
EID-1 (E1A-like inhibitor of differentiation 1) binds p300 and inhibits its histone acetyltransferase activity, thereby blocking MyoD transactivation independently of G1 exit; EID-1 also binds Rb through its LXCXE motif, and this interaction is separable from its MyoD repression function. |
Yeast two-hybrid, co-immunoprecipitation, HAT activity assay, reporter assays in skeletal muscle cells, dominant-negative constructs |
Molecular and cellular biology |
High |
11073990
|
| 2003 |
MyoD associates with CREB and p300 in a multiprotein complex in differentiating myoblasts, targeting this complex to the CRE element of the RB promoter to stimulate RB transcription; MyoD stimulation of RB promoter is independent of direct MyoD-DNA binding and requires the CRE and CREB phosphorylation at Ser-133. |
Co-immunoprecipitation, ChIP, reporter assays with CRE mutations, Western blot for CREB phosphorylation |
Molecular and cellular biology |
High |
12665587
|
| 2017 |
Loss of MyoD in myoblasts downregulates miR-133, leading to upregulation of the miR-133 target Igf1r and amplification of PI3K-Akt signaling, which drives adipogenic transdifferentiation; forced MyoD expression in brown preadipocytes upregulates miR-133 to block adipogenesis, establishing MyoD as a negative regulator of brown adipocyte fate through miR-133-Akt-Prdm16 axis. |
CRISPR/Cas9 MyoD deletion in C2C12, miRNA profiling, PI3K/Akt inhibition, miR-133 knockout, forced MyoD expression in preadipocytes |
EBioMedicine |
High |
28117277
|
| 2019 |
MyoD-induced super-enhancer-derived eRNA (seRNA-1) binds heterogeneous nuclear ribonucleoprotein L (hnRNPL) through a CAAA tract; this seRNA-1/hnRNPL interaction is required for Pol II and H3K36me3 deposition at the myoglobin (Mb) locus and its transcriptional activation. |
ChIP-seq, RNA pulldown/RIP, CAAA motif mutagenesis in seRNA-1, hnRNPL CLIP-seq, knockdown experiments |
Nature communications |
High |
31857580
|
| 2012 |
MASTR transcription factor activates MyoD expression through a muscle-specific postnatal MyoD enhancer via association with MEF2 and Myocardin family members; MASTR deletion impairs satellite cell differentiation and muscle regeneration, mimicking MyoD loss-of-function. |
Global and satellite cell-specific knockout mice, ChIP, reporter assays for MyoD enhancer, genetic epistasis with MRTF-A deletion |
Genes & development |
High |
22279050
|
| 2013 |
Six1 transcription factor binds the Core Enhancer Region (CER) of MyoD directly and is required for MyoD expression in satellite cells; Six1 knockdown reduces MyoD expression in myoblasts, and Six1 binding sites in the CER are required for reporter activity in myoblasts and regenerating muscle; Six1 is also required for proper chromatin structure at the CER and for MyoD binding at its own enhancer. |
ChIP, reporter assays (with Six1 binding site mutations), siRNA knockdown, muscle regeneration model |
PLoS one |
High |
23840772
|
| 2014 |
Ebf3 (and Ebf1 in skeletal muscle) cooperates with MyoD by directly binding the Atp2a1 (Serca1) promoter and synergizing with MyoD for its induction; loss of Ebf3 leads to impaired Ca2+ efflux in diaphragm (due to reduced Serca1), and transgenic Serca1 rescues the hypercontractile phenotype. |
ChIP at Atp2a1 promoter, reporter assays (Ebf3+MyoD co-transfection), Ebf3 knockout mice, transgenic rescue |
Nature communications |
High |
24786561
|
| 2006 |
HEB-beta (alternative splice isoform of the E-protein HEB) is upregulated during early myoblast differentiation and forms a MyoD-HEB-beta complex that binds the E1 E-box of the myogenin promoter to activate transcription; HEB-beta knockdown by siRNA blocks differentiation and myogenin induction. |
Co-immunoprecipitation, ChIP at myogenin promoter, siRNA knockdown, reporter assays, forced HEB-beta expression in myoblasts |
Molecular and cellular biology |
High |
16847330
|
| 2019 |
2-hydroxyglutarate (2HG) produced by oncogenic IDH2 blocks MyoD-driven myogenic differentiation by causing H3K9 hypermethylation (not DNA 5mC hypermethylation) at myogenic chromatin regions, impairing chromatin accessibility and preventing MyoD-mediated transcriptional activation. |
IDH2-R172K mutant expression in fibroblasts with MyoD, ATAC-seq, H3K9 methylation ChIP, 5mC analysis, MyoD-inducible differentiation model |
Proceedings of the National Academy of Sciences |
High |
31182575
|
| 2020 |
Promiscuous binding of MyoD to neuronal target loci occurs in fibroblasts, and when the muscle program is inhibited by Myt1l, this promiscuous binding is sufficient to drive neuronal reprogramming; strong MyoD binding at muscle sites correlates with non-bHLH co-factor motifs (unlike Ascl1), indicating that MyoD lineage fidelity requires active silencing by Myt1l. |
ChIP-seq in fibroblasts comparing Ascl1 vs. MyoD, ATAC-seq, RNA-seq, gain-of-function in fibroblasts with Myt1l co-expression |
Nature cell biology |
High |
32231311
|