| 2001 |
Cripto (EGF-CFC factor) interacts with the type I receptor ALK4 via its conserved CFC motif; this interaction is necessary for Nodal binding to the ALK4/ActRIIB receptor complex and for Smad2 activation by Nodal. Nodal can also inhibit BMP signaling in a Cripto-independent manner through heterodimerization with BMPs at the level of dimeric ligand production. |
Co-immunoprecipitation, receptor-binding assays, Smad2 phosphorylation assays, dominant-negative receptor experiments in cell culture |
Molecular cell |
High |
11389842
|
| 2002 |
Cripto functions both as a coreceptor (cell surface) and as a secreted coligand for Nodal; binding of Cripto to Nodal and its ability to mediate Nodal signaling requires O-linked fucosylation at a conserved site within EGF-CFC proteins. |
Luciferase reporter assay, cell coculture assays, glycosylation mutant analysis |
Molecular and cellular biology |
High |
12052855
|
| 2002 |
The proprotein convertases Spc1/Furin and Spc4/PACE4, expressed in adjacent extraembryonic ectoderm, are required for proteolytic maturation of the Nodal precursor; recombinant mature Nodal, but not uncleaved precursor, efficiently induces Cripto expression, demonstrating that extracellular proteolytic processing is required for Nodal signaling activity. |
Embryo explant assays, Spc1/Spc4 double-mutant analysis, recombinant mature vs. precursor Nodal rescue experiments |
Nature cell biology |
High |
12447384
|
| 2002 |
Cripto-1 binds to ALK4 on the cell surface (co-immunoprecipitation confirmed), and phosphorylates Smad2 in epithelial cells only in the presence of both Nodal and ALK4; Cripto-1 can also activate MAP kinase and AKT pathways independently of Nodal and ALK4. |
Phage display library screening, co-immunoprecipitation, FACS, Smad2 phosphorylation assays |
Molecular and cellular biology |
High |
11909953
|
| 2004 |
Nodal inhibits proliferation and induces apoptosis in human trophoblast cells by signaling through the type I receptor ALK7 and Smad2/3; this effect involves upregulation of p27 and downregulation of Cdk2 and cyclin D1, leading to G1 cell cycle arrest. |
Overexpression of Nodal, constitutively active ALK7, kinase-deficient ALK7, dominant-negative Smad2/3; Hoechst staining, flow cytometry, caspase-3 western blotting, BrdU assays |
The Journal of biological chemistry |
High |
15150278
|
| 2008 |
Cripto recruits the proprotein convertases Furin and PACE4 to the cell surface, localizing Nodal precursor processing there; Cripto and uncleaved Nodal associate during secretion, and export to the cell surface occurs before entering the TGN/endosomal system; Cripto guides Nodal precursor in detergent-resistant membranes to endocytic microdomains, coupling Nodal processing and endocytosis. |
Co-immunoprecipitation, density fractionation, antibody uptake experiments, brefeldin A treatment, GFP-Flotillin co-localization, electron microscopy |
The EMBO journal |
High |
18772886
|
| 2008 |
Cripto localizes Nodal at the limiting membrane of early endosomes via residues phenylalanine 78 and glycine 71 in its EGF-like motif; the CFC domain residues mediating ALK4 binding are required to prevent sequestration of Nodal in the endosomal lumen. The EGF-like motif of Cripto is not essential for Nodal binding per se, but is required for endosomal sorting. |
Site-directed mutagenesis of Cripto, immunofluorescence, subcellular fractionation, endosome co-localization assays |
Science signaling |
High |
19001664
|
| 2004 |
Nicalin and Nomo form a transmembrane protein complex that antagonizes Nodal (and Activin) signaling; ectopic expression causes cyclopia in zebrafish, and downregulation of Nomo increases anterior axial mesendoderm, phenocopying elevated Nodal signaling; inhibition of Nodal signaling by Lefty was rescued by reducing Nomo levels. |
Gain-of-function expression in zebrafish, morpholino knockdown, cell-based Nodal/Activin reporter assay, epistasis with Lefty |
The EMBO journal |
High |
15257293
|
| 2001 |
Arkadia, a nuclear protein, specifically potentiates the mesendoderm-inducing activity of Nodal-related ligands; its activity is blocked by extracellular inhibition of Nodal signaling, and Arkadia mutant mice lack a node and node-derived mesendoderm, placing Arkadia as an essential modulator within the Nodal signaling cascade. |
Xenopus gain-of-function assays, co-expression experiments, Arkadia mutant mouse phenotype analysis, extracellular Nodal antagonist rescue |
Nature |
High |
11298453
|
| 2003 |
Nodal signaling initiates asymmetric Nodal expression in the left lateral plate mesoderm (LPM) via the transcription factor Foxh1; Foxh1 mutant mice lacking Nodal in LPM fail to express Nodal, Lefty2, and Pitx2 on the left. Ectopic Nodal introduction into right LPM induces Nodal expression in wild-type but not Foxh1-mutant embryos, and also induces Lefty1 at the midline floor plate. |
Conditional Foxh1 knockout, LPM transplantation, electroporation of Nodal vector, in situ hybridization |
Development (Cambridge, England) |
High |
12642485
|
| 2003 |
Notch signaling (via Dll1 ligand and RBP-J transcriptional mediator) directly regulates Nodal gene expression at the node through RBP-J binding sites in the node-specific Nodal enhancer; mutation of these sites destroys node-specific enhancer activity in transgenic mice, placing Notch upstream of Nodal in left-right asymmetry determination. |
Dll1 mutant and Notch1/2 double mutant analysis, enhancer reporter transgenic mice, RBP-J binding site mutagenesis |
Genes & development |
High |
12730124
|
| 2014 |
Nodal forms heterodimers with GDF1; these Nodal·GDF1 heterodimers copurify with cleaved propeptides as a low molecular weight complex that stimulates Activin receptor (Acvr) signaling far more potently than Nodal alone. GDF1 suppresses an unexpected dependence of Nodal on serum proteins and is critically required for non-autonomous signaling in cells expressing the co-receptor Cryptic. |
Co-immunoprecipitation, biochemical purification, Acvr signaling reporter assays, soluble receptor inhibition assays, human ES cell differentiation |
The Journal of biological chemistry |
High |
24798330
|
| 2016 |
The EGF-CFC co-receptor Oep (zebrafish ortholog of Cripto/Cryptic) restricts the diffusive spread of Nodal ligands by setting the rate of capture by target cells; in the absence of Oep, Nodal activity spreads uniformly throughout the embryo, and depletion of Oep transforms the Nodal signaling gradient into a travelling wave. Increasing Oep levels sensitizes cells to Nodal ligands. |
In vivo Nodal signaling reporter assays, Oep mutant and overexpression analysis, computational modeling, live zebrafish embryo imaging |
eLife |
High |
34036935
|
| 2016 |
TET-mediated oxidation of 5-methylcytosine promotes demethylation of Lefty1/Lefty2 gene loci (encoding Nodal inhibitors), thereby restraining Nodal signaling; loss of all three Tet genes elevates DNA methylation at Lefty loci, reduces Lefty expression, and causes hyperactive Nodal signaling and gastrulation failure. Reducing Nodal dose in Tet-mutant background partially restores patterning. |
Triple Tet knockout mice, epistasis with Nodal heterozygosity, Dnmt3a/3b double knockout rescue, bisulfite sequencing, Tet dioxygenase catalytic point mutant |
Nature |
High |
27760115
|
| 2016 |
Extended duration of Nodal signaling promotes prechordal plate specification and suppresses endoderm differentiation; this is mediated by extended Nodal signaling inducing the transcriptional repressor goosecoid (gsc) in prechordal plate progenitors, which in turn prevents Nodal from upregulating the endoderm differentiation gene sox17. |
Photoactivatable (optogenetic) Nodal receptor in zebrafish embryos, light-controlled signaling duration manipulation, in situ hybridization |
Cell reports |
High |
27396324
|
| 2016 |
Fluorescence correlation spectroscopy in live zebrafish revealed that Nodal ligand clearance via degradation shapes the Nodal morphogen gradient; diffusivity, extracellular interactions with Acvr2b and Lefty, and selective ligand destruction collectively determine the Nodal gradient range. The binding affinity of Nodal ligands to Acvr2b and to the Nodal inhibitor Lefty was directly measured in vivo. |
Fluorescence cross-correlation spectroscopy, fluorescence correlation spectroscopy in live zebrafish, computational simulation of gradient formation |
eLife |
High |
27101364
|
| 2010 |
Tgif1 and Tgif2 transcriptional co-repressors limit the transcriptional response to Nodal signaling during gastrulation; embryos lacking both Tgifs fail to gastrulate, and genetic reduction of Nodal dose in Tgif-null embryos partially rescues gastrulation defects and left-right asymmetry defects. |
Double Tgif1/Tgif2 knockout mice, conditional epiblast deletion, Nodal heterozygosity epistasis |
Development (Cambridge, England) |
High |
20040491
|
| 2019 |
ISM1 (Isthmin1) is an extracellular antagonist of Nodal signaling that specifically inhibits Nodal-induced phosphorylation of SMAD2 without affecting TGF-β1, Activin-A, or BMP4 signaling; mechanistically, ISM1 interacts with Nodal ligand and the type I receptor ACVR1B (ALK4) through its AMOP domain, competitively disrupting the NODAL-ACVR1B interaction. |
In vitro signaling assays with recombinant proteins, co-immunoprecipitation, domain deletion analysis (AMOP domain mutants), ectopic expression in chick embryos, Smad2 phosphorylation western blotting |
The Journal of cell biology |
High |
31171630
|
| 2003 |
Tomoregulin-1 (TMEFF1) inhibits Nodal (but not Activin) signaling in Xenopus; both its follistatin modules and EGF motif contribute to Nodal inhibition, but membrane localization of TMEFF1 is essential for its function—a soluble form is insufficient. TMEFF1 inhibits BMP2 through a distinct mechanism requiring its cytoplasmic tail. |
Xenopus gain-of-function assays, deletion mutant analysis, membrane-anchored vs. soluble TMEFF1 comparison, Nodal/BMP reporter assays |
Developmental biology |
High |
12618130
|
| 2006 |
GDF-1 synergizes with Nodal through ALK4 (but not ALK7) to control anterior axis development; receptor reconstitution experiments showed GDF-1 signals via ALK4 and ALK7, but compound mutant analysis placed ALK4 as the relevant receptor mediating synergistic GDF-1/Nodal effects in the anterior primitive streak. |
Genetic compound mutant analysis (Gdf1-/-;Nodal+/-), receptor reconstitution experiments, ALK4/ALK7 epistasis analysis |
Developmental biology |
High |
16564040
|
| 2008 |
Rap2 (Ras GTPase family member) positively regulates Activin/Nodal signaling by directing internalized receptors into a recycling pathway (preventing degradation) in the absence of ligand; upon ligand activation, Rap2 delays receptor turnover. Rap2 also antagonizes Smad7. Asymmetric Rap2 expression along the dorsoventral axis of Xenopus embryos contributes to asymmetric Smad2 activation. |
Loss-of-function and gain-of-function in Xenopus embryos, receptor trafficking assays, Smad2 phosphorylation assays, Smad7 epistasis |
Developmental cell |
High |
18606140
|
| 2013 |
FGF9 from somatic cells induces testicular germ cells to upregulate Cripto, which triggers Nodal signaling in male germ cells during a critical developmental window; loss of Nodal signaling leads to premature differentiation and reduced pluripotency marker expression, while human testicular tumors show proportional upregulation of NODAL and CRIPTO. |
Conditional Nodal/Cripto mutant mice, EG cell colony formation assay in vitro, FGF9 treatment experiments, immunohistochemistry |
Development (Cambridge, England) |
Medium |
23034635
|
| 2013 |
In multipotent cardiac progenitors, transient Nodal inhibition by the dual Nodal/BMP antagonist Cerberus-1 induces Brahma-associated factor 60c (Baf60c), the cardiomyogenic variant of the SWI/SNF chromatin remodeling complex; siRNA to Cerberus-1, Baf60c, or the catalytic SWI/SNF subunit Brg1 prevented chromatin opening at the Nkx2.5 cardiac enhancer. Overexpression of Baf60c fully rescued these deficits, placing Baf60c downstream of Nodal inhibition. |
ES cell differentiation assay, siRNA knockdown, chromatin accessibility assay (DNaseI sensitivity), Baf60c overexpression rescue |
Genes & development |
High |
24186978
|
| 2016 |
ZIC2 physically interacts with SMAD2 and SMAD3 (the transcriptional mediators of NODAL signaling); together, ZIC2 and SMAD3 regulate FOXA2 transcription. HPE-associated variant forms of ZIC2 are deficient in influencing SMAD-dependent transcription, placing ZIC2 as a downstream effector in the NODAL signal transduction pathway. |
Co-immunoprecipitation, reporter assays in cultured cells, Xenopus expression experiments, HPE variant ZIC2 functional analysis |
Human molecular genetics |
Medium |
27466203
|
| 2011 |
Nodal signals through two parallel transcriptional effector arms: FoxH1-dependent (required for notochord specification) and Eomesodermin-dependent (required for endoderm, paraxial mesoderm, intermediate mesoderm, and blood specification); inhibition of Eomesodermin in FoxH1-null embryos phenocopies complete loss of Nodal signaling, demonstrating combinatorial transcription factor use in determining pathway output. |
Novel zebrafish FoxH1 (midway) mutant characterization, gel shift assays, Nodal overexpression epistasis, Eomesodermin morpholino knockdown in midway mutants |
PLoS genetics |
High |
21637786
|
| 2007 |
miR-430 dampens and balances Nodal agonist (squint) and antagonist (lefty) mRNA levels post-transcriptionally; specific protection of squint mRNA from miR-430 enhanced Nodal signaling, protection of lefty mRNA reduced it, and simultaneous protection of both or absence of miR-430 caused imbalance and net reduction in Nodal signaling. |
Target protector morpholinos, zebrafish in vivo assays, miR-430 mutant analysis |
Science (New York, N.Y.) |
High |
17761850
|
| 2007 |
In Xenopus, miR-15 and miR-16 restrict organizer size by targeting the Nodal type II receptor Acvr2a; miR-15 and miR-16 are ventrally enriched because they are negatively regulated by the dorsal Wnt/β-catenin pathway, linking Wnt and Nodal pathway crosstalk through microRNA regulation. |
Xenopus gain/loss-of-function assays, miRNA overexpression, morpholino knockdown, dorsal/ventral embryo half analysis |
Nature |
High |
17728715
|
| 2013 |
Maternal Y box-binding protein 1 (Ybx1) binds the 3' UTR of squint (sqt/nodal) mRNA and prevents its premature translation; maternal-effect ybx1 mutations cause deregulated Nodal signaling and gastrulation failure, and Nodal-coated beads phenocopy ybx1 mutant defects. |
Proteomic screen for sqt RNA 3' UTR binding proteins, maternal-effect mutant zebrafish, RNA-protein binding assays, Nodal bead implantation |
eLife |
High |
24040511
|
| 2016 |
In zebrafish, both stochastic processes and Nodal signaling (mediated by Lefty1) select prospective distal visceral endoderm (DVE) cells; Lefty1 expression in prospective DVE depends on Nodal signaling, and the cell that experiences the highest Nodal signaling begins Lefty1 expression. Deletion of Lefty1 alone or with Lefty2 increased DVE cell numbers, while ablation of prospective DVE cells triggered Lefty1 expression in remaining cells via Nodal. |
Lefty1/2 mutant mouse analysis, single-cell Nodal signaling readout, cell ablation experiments |
Nature communications |
Medium |
29138408
|
| 2016 |
The Apelin receptor (Aplnr) modulates Nodal/TGFβ signaling in zebrafish: loss of Aplnr reduces Nodal target gene expression and delays cardiogenic transcription factor (mespaa/ab) expression; activation of Aplnr by a non-peptide agonist increases Nodal target expression. Aplnr acts as a specific rheostat for Nodal output in a non-cell-autonomous manner, and elevating Nodal rescues cardiac differentiation defects from Aplnr loss. |
aplnr morpholino knockdown, double aplnra/b mutant, non-peptide agonist treatment, Nodal overexpression rescue, Nodal point-source assay |
eLife |
High |
27077952
|
| 2005 |
Two Nodal-responsive enhancers (ASE in intron 1 and LSE upstream) control asymmetric Nodal expression in the left lateral plate mesoderm; LSE activity requires a conserved FoxH1-binding sequence and depends on the Nodal co-receptor Cryptic, indicating Nodal autoregulatory positive feedback through both enhancers. |
Transgenic mouse enhancer analysis, FoxH1 binding site mutagenesis, Cryptic mutant embryo analysis, iv and inv mutant analysis |
Developmental dynamics |
High |
15736223
|