Affinage

GDF1

Embryonic growth/differentiation factor 1 · UniProt P27539

Length
372 aa
Mass
39.5 kDa
Annotated
2026-04-28
23 papers in source corpus 14 papers cited in narrative 14 extracted findings

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

GDF1 is a TGF-β superfamily ligand that functions primarily as a coligand for Nodal, forming a heterodimer that potentiates Nodal signaling range and activity during left-right axis patterning and mesendoderm specification. The Nodal·GDF1 heterodimer signals through ALK4 type I and ActRII type II Activin receptors in an EGF-CFC coreceptor (Cripto/Cryptic)-dependent manner to activate Smad2/3 phosphorylation; native GDF1 precursor is poorly processed and requires Furin-mediated cleavage or co-expression with Nodal for activation (PMID:11071769, PMID:12514096, PMID:16564040, PMID:18079174, PMID:17936261, PMID:24798330). GDF1 expression is transcriptionally controlled by Nkx2.5, Tbx6, Sp1, and C/EBPβ, linking it to cardiac, somitic, and neural regulatory networks (PMID:29650695, PMID:31171573, PMID:33360347, PMID:38491289). Beyond embryonic patterning, GDF1 activates SMAD2/3/4 to exert antiproliferative effects in gastric epithelium and engages an Akt–asparagine endopeptidase axis in hippocampal neurons to suppress synaptic degeneration (PMID:26212015, PMID:38491289).

Mechanistic history

Synthesis pass · year-by-year structured walk · 11 steps
  1. 1990 Medium

    Identification of GDF1 as a new TGF-β superfamily member established that the gene encodes a secreted glycoprotein with a predicted dibasic cleavage site and conserved C-terminal cysteine knot, placing it in the BMP/GDF ligand family.

    Evidence cDNA cloning, sequence analysis, and in vitro translation in cell-free system

    PMID:1704486

    Open questions at the time
    • No receptor or signaling pathway identified
    • Biological function unknown
    • Processing and activation mechanism not tested in vivo
  2. 2000 High

    Demonstrating that native GDF1 precursor is poorly processed but a chimeric mature domain signals through Smad2 to induce mesendoderm and reverse the left-right axis resolved the paradox of why wild-type GDF1 appeared inactive and identified its signaling pathway.

    Evidence Chimeric BMP2-prodomain/GDF1-mature-domain expression in Xenopus embryos with Smad2 reporter assays and phenotypic analysis

    PMID:11071769

    Open questions at the time
    • Identity of the endogenous activating protease not determined
    • Receptor identity unknown
    • Whether GDF1 acts alone or requires a co-ligand unclear
  3. 2003 High

    Showing that GDF1 requires EGF-CFC coreceptors and signals through Activin receptors defined its receptor complex and explained why GDF1 activity is restricted to cells expressing Cripto or Cryptic.

    Evidence Binding assays and signaling reconstitution in Xenopus; epistasis in zebrafish

    PMID:12514096

    Open questions at the time
    • Specific type I receptor (ALK4 vs ALK7) contribution not resolved
    • Physical interaction with Nodal not yet tested
  4. 2006 High

    Receptor reconstitution and compound-mutant epistasis established ALK4 as the physiologically relevant type I receptor for GDF1 and Nodal during anterior axis development, distinguishing it from ALK7.

    Evidence Receptor reconstitution in cell lines and genetic epistasis using ALK4/ALK7/GDF1/Nodal compound mutant mice

    PMID:16564040

    Open questions at the time
    • Role of ALK7 in other contexts not excluded
    • Whether GDF1 and Nodal signal as a heterodimer not yet tested
  5. 2007 High

    Discovery that GDF1 physically interacts with Nodal and functions as a coligand rather than an independent signal fundamentally reframed GDF1 biology, explaining its requirement for long-range Nodal signaling from lateral plate to midline.

    Evidence Direct protein interaction assay, co-expression rescue in Xenopus, Gdf1-knockout mouse with ectopic Nodal experiments; parallel biochemical analysis showing Furin-dependent activation and ALK4/ActRII/Cripto-dependent Smad signaling

    PMID:17936261 PMID:18079174

    Open questions at the time
    • Stoichiometry and structure of the Nodal·GDF1 heterodimer unknown
    • Mechanism by which Nodal facilitates GDF1 processing not defined
  6. 2014 High

    Biochemical isolation of a Nodal·GDF1 heterodimer copurified with cleaved propeptides as a low-molecular-weight complex explained how GDF1 potentiates Nodal: it stabilizes a signaling-competent form that is accessible to receptor neutralization, without increasing direct co-receptor binding.

    Evidence Co-immunoprecipitation, size-exclusion co-purification, soluble Acvr2 neutralization, human ES cell differentiation assay

    PMID:24798330

    Open questions at the time
    • Crystal structure of the heterodimer not determined
    • Role of propeptide association in diffusion range not tested in vivo
  7. 2015 Medium

    Extending GDF1 function beyond embryonic patterning, two studies showed it activates SMAD2/3/4 to suppress proliferation in gastric cells (silenced by promoter methylation in cancer) and induces IL-6/STAT3 and Smad1/5/8 signaling in macrophages, revealing context-dependent pathway usage.

    Evidence Methylation scanning with 5-aza-dC reactivation and Smad phosphorylation western blots in gastric cancer cells; recombinant GDF1 treatment with ALK inhibitor pharmacology in macrophages

    PMID:26212015 PMID:28955827

    Open questions at the time
    • Smad1/5/8 activation in macrophages is atypical for a Nodal-class ligand — receptor complex mediating this not identified
    • Tumor-suppressive role based on cell lines without in vivo validation
    • Whether macrophage effects require Nodal co-expression unknown
  8. 2018 Medium

    Identifying Tbx6 as a direct upstream transcriptional regulator of Gdf1 around the node linked somitic transcription factor networks to left-right patterning via GDF1.

    Evidence Genetic epistasis using Tbx6 mutants, transgenic Gdf1 rescue, gene expression analysis in mouse embryos

    PMID:29650695

    Open questions at the time
    • Direct promoter binding by Tbx6 not demonstrated by ChIP
    • Relationship between Tbx6 and other GDF1 regulators (Nkx2.5, Sp1) not addressed
  9. 2019 Medium

    Demonstrating that Nkx2.5 binds the GDF1 promoter and transactivates it placed GDF1 downstream of a key cardiac transcription factor, providing a regulatory link between cardiac specification and Nodal signaling.

    Evidence ChIP, DNA pulldown, luciferase reporter assay

    PMID:31171573

    Open questions at the time
    • Functional consequence of Nkx2.5-driven GDF1 in cardiac development not shown in vivo
    • Integration with Tbx6-mediated regulation not examined
  10. 2020 Medium

    Sp1 was identified as another direct transcriptional activator of GDF1, with arsenic-induced ROS suppressing GDF1 via Sp1 downregulation, adding an environmental-stress axis to GDF1 regulation.

    Evidence ChIP for Sp1 at GDF1 promoter, Sp1 overexpression/knockdown, antioxidant rescue experiments

    PMID:33360347

    Open questions at the time
    • SIRT1/p66shc feedback loop effect on GDF1 protein shown indirectly
    • Relevance to embryonic versus adult contexts unclear
  11. 2024 Medium

    In hippocampal neurons, GDF1 activates Akt to phosphorylate and inhibit asparagine endopeptidase (AEP), suppressing AEP-driven synaptic degeneration and amyloid-β production — a pathway distinct from canonical Smad signaling and regulated by C/EBPβ-mediated transcriptional repression.

    Evidence AAV-mediated GDF1 overexpression/knockdown in mouse hippocampus, western blot for Akt and AEP phosphorylation, behavioral testing

    PMID:38491289

    Open questions at the time
    • Receptor mediating Akt activation in neurons not identified
    • Whether Nodal is a required coligand in this neural context unknown
    • Single-lab finding not yet independently replicated

Open questions

Synthesis pass · forward-looking unresolved questions
  • Key unresolved questions include the structural basis of the Nodal·GDF1 heterodimer, how receptor specificity shifts between Smad2/3 and Smad1/5/8 in different cell types, whether GDF1 functions independently of Nodal in adult tissues, and the in vivo transport mechanism of the heterodimer through extracellular space.
  • No crystal or cryo-EM structure of Nodal·GDF1 complex
  • Receptor complex mediating non-canonical Smad1/5/8 or Akt signaling unknown
  • Nodal-independent functions in adult tissues not established

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0048018 receptor ligand activity 5 GO:0098772 molecular function regulator activity 2
Localization
GO:0005576 extracellular region 2
Pathway
R-HSA-162582 Signal Transduction 7 R-HSA-1266738 Developmental Biology 3
Partners
ACVR2AACVR2BALK4CRIPTOCRYPTICFURINNODALSMAD2
Complex memberships
Nodal·GDF1 heterodimer

Evidence

Reading pass · 14 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
1990 GDF1 was identified as a new member of the TGF-beta superfamily, predicted to be a secreted glycoprotein with a dibasic proteolytic cleavage site. In vitro translation experiments confirmed it is a secreted glycoprotein, and its C-terminus shares the invariant cysteines characteristic of TGF-beta family members. cDNA cloning, sequence analysis, in vitro translation Molecular endocrinology Medium 1704486
2000 Native GDF1 is not proteolytically processed and therefore inactive, but a chimeric protein containing a heterologous prodomain (BMP2 prodomain fused to GDF1 mature domain) is efficiently processed and signals via Smad2 to induce mesendoderm and axial duplication in Xenopus. Mature GDF1 is sufficient to reverse the left-right axis. Chimeric protein expression in Xenopus embryos, Smad2 signaling assay, loss-of-function and gain-of-function in vivo Developmental biology High 11071769
2003 GDF1 signaling requires EGF-CFC coreceptors and is mediated through Activin receptors. GDF1 binds to and signals through Activin receptors only in the presence of EGF-CFC proteins in Xenopus, establishing that GDF1 converges on Activin receptor/EGF-CFC complexes. Binding assay, signaling reconstitution in Xenopus, zebrafish epistasis Genes & development High 12514096
2006 GDF1 signals through type I receptor ALK4 (and ALK7) in receptor reconstitution experiments. Genetic epistasis using compound mutants showed that ALK4, but not ALK7, is responsible for the effects of GDF1 and Nodal during anterior axis development. GDF1 and Nodal converge on ALK4 in the anterior primitive streak. Receptor reconstitution, compound mutant genetic epistasis, in vivo phenotypic analysis Developmental biology High 16564040
2007 GDF1 functions as a coligand for Nodal rather than as an independent ligand. GDF1 directly interacts with Nodal and greatly increases its specific activity and signaling range. GDF1 is required for long-range Nodal signaling from the lateral plate to the midline in mouse embryos. Direct protein interaction assay, co-expression in frog embryos, Gdf1 knockout mouse with Nodal introduction experiments Genes & development High 18079174
2007 Native GDF1 precursor is poorly processed when expressed in heterologous cells but its activity can be exposed by co-expression with Furin pro-protein convertase or by using chimeric constructs with heterologous prodomains. Co-expression with Nodal can also activate native GDF1, indicating a novel mode of cooperation. GDF1 signals through ALK4, ActRIIA, ActRIIB, and Cripto to activate Smad-dependent reporters. Heterologous cell expression, Furin co-expression, chimeric construct analysis, Smad reporter assay Developmental biology High 17936261
2014 Nodal and GDF1 form a heterodimeric complex that copurifies with their cleaved propeptides as a low molecular weight complex. This Nodal·GDF1 heterodimer suppresses serum dependence of Nodal and is required for non-autonomous signaling in Cryptic-expressing cells. GDF1 potentiates Nodal activity by stabilizing a low molecular weight fraction susceptible to neutralization by soluble Acvr2, without increasing direct binding to co-receptors or Activin receptor extracellular domains. Co-immunoprecipitation, protein co-purification, Activin receptor signaling assay, soluble receptor neutralization assay, human ES cell differentiation The Journal of biological chemistry High 24798330
2015 GDF1 activates SMAD2/3/4-mediated signaling to exert antiproliferative activity in gastric cells. Epigenetic silencing of GDF1 by promoter hypermethylation abrogates SMAD2/3 phosphorylation, and reactivation of GDF1 restores Smad signaling and transcriptional control of p15, p21, c-Myc cell-cycle regulators and phosphorylation of retinoblastoma protein. 5-aza-dC treatment, genome-wide methylation scanning, Smad phosphorylation western blot, functional characterization in cancer cells Oncogene Medium 26212015
2015 GDF1 acts as a proinflammatory factor in macrophages by inducing IL-6 production and STAT3 activation. Recombinant GDF1 promotes macrophage migration via Smad1/5/8 phosphorylation in a manner sensitive to ALK inhibitors. Recombinant protein treatment, western blot, ELISA, migration assay, ALK inhibitor pharmacology Biochemistry and biophysics reports Medium 28955827
2018 Tbx6 transcription factor controls left-right asymmetry through regulation of Gdf1 expression around the node. Gdf1 is a downstream target of Tbx6, and a Gdf1 transgene partially rescues the laterality defect of Tbx6 homozygous mutants. Genetic epistasis, transgenic rescue, gene expression analysis Biology open Medium 29650695
2019 Nkx2.5 transcriptionally activates GDF1 expression by binding to its promoter. Luciferase assay, chromatin immunoprecipitation, and DNA pulldown demonstrated Nkx2.5 binds the GDF1 promoter and transactivates it, placing Nkx2.5 upstream of GDF1. Luciferase reporter assay, chromatin immunoprecipitation, DNA pulldown assay Clinical science Medium 31171573
2020 Arsenic suppresses GDF1 expression via ROS-dependent downregulation of Sp1. Sp1 acts as a transcriptional activator of GDF1 by binding to its promoter (shown by ChIP). SIRT1, regulated by Sp1, also modulates GDF1 protein expression through a p66shc/ROS feedback loop. Chromatin immunoprecipitation, Sp1 overexpression/knockdown, antioxidant rescue, dominant-negative mutant Environmental pollution Medium 33360347
2024 GDF1 in the hippocampus activates Akt, which phosphorylates asparagine endopeptidase (AEP) and inhibits AEP-induced synaptic degeneration and amyloid-β production. GDF1 expression is downregulated by the transcription factor C/EBPβ. Knockdown of GDF1 mimics hearing-loss-induced cognitive impairment, while hippocampal overexpression attenuates it. Knockdown, AAV-mediated overexpression, western blot for Akt/AEP phosphorylation, mouse behavioral testing Nature aging Medium 38491289
2025 The Nodal·GDF1 heterodimer is the major signal transducer in vertebrate Nodal signaling and spreads from the left-right organizer through the extracellular space of the paraxial mesoderm to the lateral plate mesoderm in a free-diffusion-like manner, as visualized in live zebrafish using transgenic lines and extracellular trapping (morphotrap). Transgenic zebrafish live imaging, extracellular morphotrap trapping, fluorescent protein tagging bioRxivpreprint Medium bio_10.1101_2025.08.13.670121

Source papers

Stage 0 corpus · 23 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2003 EGF-CFC proteins are essential coreceptors for the TGF-beta signals Vg1 and GDF1. Genes & development 146 12514096
2007 Long-range action of Nodal requires interaction with GDF1. Genes & development 100 18079174
2007 Loss-of-function mutations in growth differentiation factor-1 (GDF1) are associated with congenital heart defects in humans. American journal of human genetics 92 17924340
1990 Identification of a novel member (GDF-1) of the transforming growth factor-beta superfamily. Molecular endocrinology (Baltimore, Md.) 87 1704486
2006 Synergistic interaction between Gdf1 and Nodal during anterior axis development. Developmental biology 80 16564040
2007 Distinct and cooperative roles of mammalian Vg1 homologs GDF1 and GDF3 during early embryonic development. Developmental biology 77 17936261
2000 Mesendoderm induction and reversal of left-right pattern by mouse Gdf1, a Vg1-related gene. Developmental biology 60 11071769
2014 Nodal·Gdf1 heterodimers with bound prodomains enable serum-independent nodal signaling and endoderm differentiation. The Journal of biological chemistry 36 24798330
2010 Recessively inherited right atrial isomerism caused by mutations in growth/differentiation factor 1 (GDF1). Human molecular genetics 35 20413652
2012 mTNF reverse signalling induced by TNFα antagonists involves a GDF-1 dependent pathway: implications for Crohn's disease. Gut 27 22535372
2015 Epigenetic silencing of GDF1 disrupts SMAD signaling to reinforce gastric cancer development. Oncogene 20 26212015
2020 Arsenic suppresses GDF1 expression via ROS-dependent downregulation of specificity protein 1. Environmental pollution (Barking, Essex : 1987) 19 33360347
2007 Cloning and characterization of a LASS1-GDF1 transcript in rat cerebral cortex: conservation of a bicistronic structure. DNA sequence : the journal of DNA sequencing and mapping 12 17364820
2024 GDF1 ameliorates cognitive impairment induced by hearing loss. Nature aging 11 38491289
2015 Association of GDF1 rs4808863 with fetal congenital heart defects: a case-control study. BMJ open 11 26656983
2012 Klippel-Feil syndrome associated with situs inversus: description of a new case and exclusion of GDF1, GDF3 and GDF6 as causal genes. European journal of medical genetics 11 22522086
2019 Association of functional variant in GDF1 promoter with risk of congenital heart disease and its regulation by Nkx2.5. Clinical science (London, England : 1979) 9 31171573
2018 Tbx6 controls left-right asymmetry through regulation of Gdf1. Biology open 8 29650695
2020 A founder truncating variant in GDF1 causes autosomal-recessive right isomerism and associated congenital heart defects in multiplex Arab kindreds. American journal of medical genetics. Part A 6 32144877
2015 GDF1 is a novel mediator of macrophage infiltration in brown adipose tissue of obese mice. Biochemistry and biophysics reports 6 28955827
2008 Generation and characterization of a Gdf1 conditional null allele. Genesis (New York, N.Y. : 2000) 6 18615710
2018 Phylogenetic evidence for independent origins of GDF1 and GDF3 genes in anurans and mammals. Scientific reports 5 30206386
2022 Homozygous variants in the GDF1 gene related to recurrent right isomerism and complex CHD in two Indian families. Cardiology in the young 0 35351224