Section 1: Gene Identifiers
| Database | Identifier | Description |
|---|
| HGNC | HGNC:6770 | Approved symbol: SMAD4 |
| Ensembl | ENSG00000141646 | Ensembl gene ID |
| NCBI Entrez | 4089 | Entrez Gene ID |
| OMIM | 600993 | Gene/locus MIM number |
| Locus Group | protein-coding gene | Gene with protein product |
| Gene Family | SMAD family | |
Genomic Location (GRCh38/hg38)
| Attribute | Value |
|---|
| Chromosome | 18 |
| Cytogenetic Band | 18q21.2 |
| Start Position | 51,028,528 |
| End Position | 51,085,045 |
| Strand | + (forward) |
| Span | 56,518 bp |
Section 2: Transcript Identifiers
Ensembl Transcripts
Total transcript count: 49
| Transcript ID | Biotype | Start | End |
|---|
| ENST00000342988 | protein_coding | 51030213 | 51085042 |
| ENST00000398417 | protein_coding | 51029614 | 51085045 |
| ENST00000588745 | protein_coding | 51047047 | 51078467 |
| ENST00000588860 | protein_coding | 51028528 | 51085017 |
| ENST00000589076 | protein_coding | 51030100 | 51085042 |
| ENST00000589941 | protein_coding | 51030209 | 51085042 |
| ENST00000590061 | protein_coding | 51030213 | 51085042 |
| ENST00000593223 | protein_coding | 51030219 | 51079777 |
| ENST00000714261 | protein_coding | 51030210 | 51080083 |
| ENST00000714264 | protein_coding | 51030213 | 51079781 |
| ENST00000714266 | protein_coding | 51030221 | 51079776 |
| ENST00000714268 | protein_coding | 51030221 | 51079777 |
| ENST00000714269 | protein_coding | 51030222 | 51079781 |
| ENST00000714270 | protein_coding | 51030223 | 51079775 |
| ENST00000714272 | protein_coding | 51030224 | 51079777 |
| ENST00000877432 | protein_coding | 51030099 | 51079781 |
| ENST00000877433 | protein_coding | 51030582 | 51079191 |
| ENST00000932317 | protein_coding | 51030210 | 51085042 |
| ENST00000932318 | protein_coding | 51030221 | 51080369 |
| ENST00000932319 | protein_coding | 51030212 | 51079774 |
| ENST00000971068 | protein_coding | 51030223 | 51079778 |
| ENST00000971069 | protein_coding | 51030222 | 51079777 |
| ENST00000971070 | protein_coding | 51030223 | 51079777 |
| ENST00000971071 | protein_coding | 51030222 | 51079776 |
| ENST00000971072 | protein_coding | 51030293 | 51079145 |
| ENST00000585448 | retained_intron | 51051093 | 51054916 |
| ENST00000586253 | retained_intron | 51077251 | 51078870 |
| ENST00000589706 | retained_intron | 51047179 | 51049565 |
| ENST00000590499 | retained_intron | 51066822 | 51077291 |
| ENST00000591126 | retained_intron | 51052326 | 51079777 |
| (+19 more retained_intron/NMD transcripts) | | | |
RefSeq Transcripts
| RefSeq ID | Type | Status | MANE Select |
|---|
| NM_005359 | mRNA | REVIEWED | Yes ✓ |
| NM_001407041 | mRNA | REVIEWED | No |
| NM_001407042 | mRNA | REVIEWED | No |
| NM_001407043 | mRNA | REVIEWED | No |
| NM_001364967 | mRNA | VALIDATED | No |
| NM_001364968 | mRNA | VALIDATED | No |
| NR_176264 | ncRNA | REVIEWED | No |
| NR_176265 | ncRNA | REVIEWED | No |
CCDS Identifier
Exons for Canonical Transcript (ENST00000342988)
Total exon count: 12
| Exon ID | Start | End | Strand |
|---|
| ENSE00004023391 | 51030213 | 51030623 | + |
| ENSE00003669145 | 51046920 | 51047295 | + |
| ENSE00002877760 | 51048686 | 51048860 | + |
| ENSE00004013734 | 51049295 | 51049324 | + |
| ENSE00004013729 | 51054781 | 51054993 | + |
| ENSE00004013736 | 51058125 | 51058244 | + |
| ENSE00004013735 | 51058340 | 51058456 | + |
| ENSE00004013727 | 51059866 | 51059916 | + |
| ENSE00004013731 | 51065423 | 51065606 | + |
| ENSE00004013728 | 51067019 | 51067187 | + |
| ENSE00004013730 | 51076638 | 51076776 | + |
| ENSE00004013733 | 51078256 | 51085042 | + |
Section 3: Protein Identifiers
UniProt Accessions
| Accession | Name | Status | Mass | Length |
|---|
| Q13485 | SMAD family member 4 | Reviewed (Canonical) ✓ | 60,439 Da | 552 aa |
Alternative names:
- Deletion target in pancreatic carcinoma 4 (DPC4)
- Mothers against decapentaplegic homolog 4
RefSeq Protein IDs
| RefSeq Protein | Status | MANE Select |
|---|
| NP_005350 | REVIEWED | Yes ✓ |
| NP_001393970 | REVIEWED | No |
| NP_001393971 | REVIEWED | No |
| NP_001393972 | REVIEWED | No |
| NP_001351896 | VALIDATED | No |
| NP_001351897 | VALIDATED | No |
Protein Domains and Families
| ID | Name | Type |
|---|
| IPR001132 | SMAD_dom | Domain |
| IPR003619 | MAD_homology1_Dwarfin-type | Domain |
| IPR013019 | MAD_homology_MH1 | Domain |
| IPR013790 | SMAD/Dwarfins | Family |
| IPR008984 | SMAD_FHA_dom_sf | Homologous_superfamily |
| IPR017855 | SMAD-like_dom_sf | Homologous_superfamily |
| IPR036578 | SMAD_MH1_sf | Homologous_superfamily |
| PF03165 | MH1 domain (Pfam) | Domain |
| PF03166 | MH2 domain (Pfam) | Domain |
Section 4: Structure Identifiers
Experimental Structures (PDB)
Total PDB structure count: 12
| PDB ID | Title | Method | Resolution (Å) |
|---|
| 6YIC | 14-3-3 sigma in complex with SMAD4 pS403 peptide | X-ray | 1.60 |
| 5MEY | Smad4-MH1 bound to GGCGC site | X-ray | 2.05 |
| 1YGS | SMAD4 tumor suppressor C-terminal domain | X-ray | 2.10 |
| 5UWU | SMAD4 NES peptide with CRM1-Ran-RanBP1 | X-ray | 2.24 |
| 5C4V | Ski-like protein complex | X-ray | 2.60 |
| 1U7F | Phosphorylated Smad3/Smad4 heterotrimer | X-ray | 2.60 |
| 1DD1 | SMAD4 active fragment | X-ray | 2.62 |
| 1U7V | Phosphorylated Smad2/Smad4 heterotrimer | X-ray | 2.70 |
| 1MR1 | Smad4-Ski complex | X-ray | 2.85 |
| 5MEZ | Smad4-MH1 bound to GGCT site | X-ray | 2.98 |
| 1G88 | S4AFL3ARG515 mutant | X-ray | 3.00 |
| 5MF0 | Smad4-MH1 bound to GGCCG site | X-ray | 3.03 |
Predicted Structures (AlphaFold)
| AlphaFold ID | Global pLDDT | Sequence Length | Fraction Very High Confidence |
|---|
| Q13485 | 74.56 | 4253 | 0.53 (53%) |
Section 5: Cross-Species Orthologs
| Organism | Gene ID | Symbol | Biotype |
|---|
| Mouse (Mus musculus) | ENSMUSG00000024515 | Smad4 | protein_coding |
| Rat (Rattus norvegicus) | ENSRNOG00000051965 | Smad4 | protein_coding |
| Zebrafish (Danio rerio) | ENSDARG00000012649 | smad4b | protein_coding |
| Zebrafish (Danio rerio) | ENSDARG00000075226 | smad4a | protein_coding |
| Fruit fly (Drosophila melanogaster) | FBGN0020493 | Dad | protein_coding |
| Worm (C. elegans) | WBGENE00006445 | tag-68 | protein_coding |
| Yeast (S. cerevisiae) | — | No ortholog | — |
Section 6: Clinical Variants & AI Predictions
Clinical Variant Summary (ClinVar)
Total variant count: 2,571
| Classification | Count |
|---|
| Pathogenic | ~200+ |
| Likely Pathogenic | ~50+ |
| Uncertain Significance (VUS) | ~1,800+ |
| Likely Benign | ~150+ |
| Benign/Likely Benign | ~300+ |
| Conflicting | Several |
TOP 50 Pathogenic/Likely Pathogenic Variants
| Variant ID | HGVS Notation | Type | Classification |
|---|
| 24802 | c.403C>T (p.Arg135Ter) | SNV | Pathogenic |
| 24830 | c.1081C>G (p.Arg361Gly) | SNV | Pathogenic |
| 24842 | c.1162C>T (p.Gln388Ter) | SNV | Pathogenic |
| 24850 | c.1333C>T (p.Arg445Ter) | SNV | Pathogenic |
| 140903 | c.1345C>T (p.Gln449Ter) | SNV | Pathogenic |
| 142253 | c.1245_1248del (p.Asp415Glufs) | Deletion | Pathogenic |
| 156513 | c.1547dup (p.Ser517fs) | Duplication | Pathogenic |
| 182867 | c.1231_1232del (p.Ser411fs) | Microsatellite | Pathogenic |
| 182871 | c.1239C>A (p.Tyr413Ter) | SNV | Pathogenic |
| 182873 | c.1258_1259dup (p.Ala421fs) | Duplication | Pathogenic |
| 187217 | c.153dup (p.Asp52fs) | Duplication | Pathogenic |
| 224548 | c.886_895del (p.Pro296fs) | Deletion | Pathogenic |
| 240143 | c.1206dup (p.Ser403Ter) | Duplication | Pathogenic |
| 240156 | c.906G>A (p.Trp302Ter) | SNV | Pathogenic |
| 1050635 | c.733C>T (p.Gln245Ter) | SNV | Pathogenic |
| 1073157 | c.620del (p.Asn207fs) | Deletion | Pathogenic |
| 1074223 | c.779dup (p.Tyr260Ter) | Duplication | Pathogenic |
| 1076671 | c.968G>A (p.Trp323Ter) | SNV | Pathogenic |
| 1757953 | c.725C>G (p.Ser242Ter) | SNV | Pathogenic |
| 2026527 | c.803G>A (p.Trp268Ter) | SNV | Pathogenic |
| 1067853 | c.1308+2T>G | SNV | Likely pathogenic |
| 1066208 | c.1149A>G (p.Ile383Met) | SNV | Likely pathogenic |
| 1032991 | c.803_804insCTAAGTGGTAGTA | Insertion | Likely pathogenic |
| (+additional pathogenic variants) | | | |
AI-Based Variant Effect Predictions
SpliceAI Predictions
Total splice-altering predictions: 2,425
| Variant | Effect | Delta Score |
|---|
| 18:51028631:C>G | donor_gain | 0.92 |
| 18:51028666:G>GG | donor_gain | 0.91 |
| 18:51029741:G>GT | donor_gain | 0.76 |
| 18:51029742:A>T | donor_gain | 0.75 |
| 18:51029770:G>GT | donor_gain | 0.72 |
| 18:51030152:G>GT | donor_gain | 0.66 |
| 18:51028588:G>GT | donor_gain | 0.64 |
| 18:51028670:G>GT | donor_gain | 0.60 |
| 18:51028665:T>G | donor_gain | 0.58 |
| 18:51028662:ATCT>A | donor_gain | 0.56 |
| (+2,415 more predictions) | | |
AlphaMissense Predictions
Total missense predictions: 3,631
| Variant | Protein Change | AM Score | Classification |
|---|
| 18:51047080:A>C | S12R | 0.999 | likely_pathogenic |
| 18:51047082:T>A | S12R | 0.999 | likely_pathogenic |
| 18:51047086:G>C | D14H | 1.000 | likely_pathogenic |
| 18:51047086:G>T | D14Y | 0.999 | likely_pathogenic |
| 18:51047087:A>G | D14G | 0.998 | likely_pathogenic |
| 18:51047087:A>T | D14V | 0.999 | likely_pathogenic |
| 18:51047090:C>A | A15D | 1.000 | likely_pathogenic |
| 18:51047081:G>T | S12I | 0.997 | likely_pathogenic |
| 18:51047086:G>A | D14N | 0.994 | likely_pathogenic |
| 18:51047088:T>A | D14E | 0.991 | likely_pathogenic |
| 18:51047075:C>G | P10R | 0.989 | likely_pathogenic |
| 18:51047084:A>G | N13S | 0.072 | likely_benign |
| 18:51047069:A>G | N8S | 0.072 | likely_benign |
| (+3,600+ more predictions) | | | |
Section 7: Biological Pathways & Gene Ontology
Pathway Membership (Reactome)
Total pathway count: 21
| Pathway ID | Pathway Name | Disease Pathway |
|---|
| R-HSA-2173789 | TGF-beta receptor signaling activates SMADs | No |
| R-HSA-2173796 | SMAD2/SMAD3:SMAD4 heterotrimer regulates transcription | No |
| R-HSA-2173795 | Downregulation of SMAD2/3:SMAD4 transcriptional activity | No |
| R-HSA-201451 | Signaling by BMP | No |
| R-HSA-1502540 | Signaling by Activin | No |
| R-HSA-1181150 | Signaling by NODAL | No |
| R-HSA-452723 | Transcriptional regulation of pluripotent stem cells | No |
| R-HSA-9733709 | Cardiogenesis | No |
| R-HSA-9754189 | Germ layer formation at gastrulation | No |
| R-HSA-9823730 | Formation of definitive endoderm | No |
| R-HSA-8941326 | RUNX2 regulates bone development | No |
| R-HSA-8941855 | RUNX3 regulates CDKN1A transcription | No |
| R-HSA-8952158 | RUNX3 regulates BCL2L11 (BIM) transcription | No |
| R-HSA-9615017 | FOXO-mediated transcription (oxidative stress, metabolic, neuronal) | No |
| R-HSA-9617828 | FOXO-mediated transcription of cell cycle genes | No |
| R-HSA-5689880 | Ub-specific processing proteases | No |
| R-HSA-3311021 | SMAD4 MH2 Domain Mutants in Cancer | Yes |
| R-HSA-3315487 | SMAD2/3 MH2 Domain Mutants in Cancer | Yes |
| R-HSA-9735871 | SARS-CoV-1 targets host intracellular signalling | Yes |
| R-HSA-9839394 | TGFBR3 expression | No |
| R-HSA-9844594 | EBF2 regulation of adipocyte differentiation | No |
Gene Ontology Annotations
Total GO annotations: 110+
Biological Process (TOP 20)
| GO ID | Term |
|---|
| GO:0007179 | transforming growth factor beta receptor signaling pathway |
| GO:0030509 | BMP signaling pathway |
| GO:0032924 | activin receptor signaling pathway |
| GO:0060395 | SMAD protein signal transduction |
| GO:0045944 | positive regulation of transcription by RNA polymerase II |
| GO:0000122 | negative regulation of transcription by RNA polymerase II |
| GO:0006357 | regulation of transcription by RNA polymerase II |
| GO:0001837 | epithelial to mesenchymal transition |
| GO:0010718 | positive regulation of epithelial to mesenchymal transition |
| GO:0008285 | negative regulation of cell population proliferation |
| GO:0030308 | negative regulation of cell growth |
| GO:0001649 | osteoblast differentiation |
| GO:0014033 | neural crest cell differentiation |
| GO:0001701 | in utero embryonic development |
| GO:0001702 | gastrulation with mouth forming second |
| GO:0003148 | outflow tract septum morphogenesis |
| GO:0003161 | cardiac conduction system development |
| GO:0060412 | ventricular septum morphogenesis |
| GO:0007283 | spermatogenesis |
| GO:0001541 | ovarian follicle development |
Molecular Function (TOP 20)
| GO ID | Term |
|---|
| GO:0003700 | DNA-binding transcription factor activity |
| GO:0000981 | DNA-binding transcription factor activity, RNA polymerase II-specific |
| GO:0001228 | DNA-binding transcription activator activity, RNA polymerase II-specific |
| GO:0043565 | sequence-specific DNA binding |
| GO:0000976 | transcription cis-regulatory region binding |
| GO:0000978 | RNA polymerase II cis-regulatory region sequence-specific DNA binding |
| GO:0003682 | chromatin binding |
| GO:0042802 | identical protein binding |
| GO:0042803 | protein homodimerization activity |
| GO:0070411 | I-SMAD binding |
| GO:0070412 | R-SMAD binding |
| GO:0001222 | transcription corepressor binding |
| GO:0001223 | transcription coactivator binding |
| GO:0061629 | RNA polymerase II-specific DNA-binding transcription factor binding |
| GO:0005518 | collagen binding |
| GO:0031005 | filamin binding |
| GO:0043199 | sulfate binding |
| GO:0046872 | metal ion binding |
Cellular Component (TOP 15)
| GO ID | Term |
|---|
| GO:0005634 | nucleus |
| GO:0005654 | nucleoplasm |
| GO:0005737 | cytoplasm |
| GO:0005829 | cytosol |
| GO:0005667 | transcription regulator complex |
| GO:0071141 | SMAD protein complex |
| GO:0071144 | heteromeric SMAD protein complex |
| GO:0032444 | activin responsive factor complex |
| GO:0005813 | centrosome |
| GO:0036064 | ciliary basal body |
| GO:0000785 | chromatin |
Section 8: Protein Interactions & Molecular Networks
Protein-Protein Interactions
Total STRING interactions: 4,822
Total IntAct interactions: 1,627
Total BioGRID interactions: 850+
TOP 50 Highest-Confidence STRING Interactors
| UniProt ID | Gene | Confidence Score |
|---|
| P35222 | CTNNB1 (β-catenin) | 994 |
| O75593 | SMAD3 | 990 |
| P12756 | SKI | 990 |
| Q15796 | SMAD2 | 990 |
| P84022 | SMAD3 | 989 |
| Q9UJU2 | LEF1 | 989 |
| O15198 | SMAD9 | 988 |
| P05412 | JUN | 988 |
| Q99717 | SMAD5 | 988 |
| P41235 | HNF4A | 987 |
| P36897 | TGFBR1 | 975 |
| Q16254 | EP300 | 972 |
| P37173 | TGFBR2 | 961 |
| O43541 | SMAD6 | 958 |
| O95863 | SNAI1 | 957 |
| Q09472 | EP300 | 925 |
| P01137 | TGFB1 | 917 |
| Q9UER7 | DAXX | 915 |
| P36894 | BMPR1A | 912 |
| P36896 | ACVR1B | 911 |
| O43524 | FOXO3 | 909 |
| P01116 | KRAS | 909 |
| P60484 | PTEN | 909 |
| P12644 | BMP4 | 907 |
| Q9UI36 | DAB2 | 902 |
| Q13547 | HDAC1 | 894 |
| Q13873 | BMPR2 | 889 |
| P37023 | ACVRL1 | 884 |
| P12643 | BMP2 | 877 |
| P04637 | TP53 | 873 |
| P08112 | GDF2 | 870 |
| Q15329 | ACVR2A | 870 |
| P01106 | MYC | 868 |
| P21359 | NF1 | 865 |
| Q92793 | CREBBP | 863 |
| P42771 | CDKN2A | 851 |
| Q04771 | ACVR1 | 848 |
| Q15672 | TWIST1 | 845 |
| Q15831 | STK11 | 840 |
| O43623 | SNAI2 | 839 |
| P03372 | ESR1 | 833 |
| Q9UPN9 | TRIM33 | 824 |
| P01100 | FOS | 822 |
| P17676 | CEBPB | 818 |
| Q9HAU4 | SMURF2 | 813 |
| P49716 | RUNX3 | 811 |
| Q9HCE7 | WWP1 | 811 |
| P10275 | AR | 809 |
| P46531 | NOTCH1 | 809 |
| P78366 | WWTR1 | 809 |
Protein Similarity
ESM2 Structural/Embedding Similarity
Total similar proteins: 81
| UniProt ID | Similarity Count | Top Similarity | Avg Similarity |
|---|
| O08791 (Smad4 Mouse) | 50 | 1.0000 | 0.9925 |
| Q9H4W6 | 50 | 1.0000 | 0.9925 |
| Q9R1V3 | 50 | 1.0000 | 0.9940 |
| Q15797 (SMAD1) | 50 | 1.0000 | 0.9937 |
| P97471 | 50 | 1.0000 | 0.9912 |
| O70437 (Smad4 Rat) | 50 | 1.0000 | 0.9911 |
| P03234 | 50 | 1.0000 | 0.9902 |
| P70340 (Smad2) | 50 | 0.9999 | 0.9935 |
| P97588 (SMAD6) | 50 | 0.9997 | 0.9941 |
| Q13761 (RUNX1T1) | 50 | 0.9997 | 0.9913 |
DIAMOND Sequence Similarity
Total homologous proteins: 35
| UniProt ID | Gene | Identity (%) | Bitscore |
|---|
| P84022 | SMAD3 | 100.00 | 891 |
| P84024 | SMAD3 | 100.00 | 891 |
| P84025 | SMAD3 | 100.00 | 891 |
| Q99717 | SMAD5 | 100.00 | 909 |
| Q8BUN5 | Smad3 (mouse) | 100.00 | 891 |
| Q5R7C0 | SMAD2 | 99.80 | 946 |
| O70436 | Smad4 (mouse) | 99.80 | 945 |
| Q15796 | SMAD2 | 99.80 | 946 |
| Q15797 | SMAD1 | 99.60 | 930 |
| O70437 | Smad4 (rat) | 99.50 | 1092 |
| P97471 | Smad4 | 99.50 | 1092 |
| Q1HE26 | SMAD4 | 99.10 | 1089 |
| O43541 | SMAD6 | 92.00 | 904 |
| O35182 | Smad6 | 92.00 | 899 |
| O15198 | SMAD9 | 89.10 | 849 |
Section 9: Transcription Factor Regulatory Data
SMAD4 as Transcription Factor
Downstream Targets (Genes Regulated BY SMAD4)
Total target gene count: 172+
| Target Gene | Regulation | Confidence |
|---|
| CDKN1A | Activation | High |
| ID1 | Activation | High |
| ID2 | Activation | High |
| HAMP | Activation | High |
| BBC3 (PUMA) | Activation | High |
| MET | Activation | High |
| BAMBI | Activation | High |
| FSHB | Activation | High |
| GADD45B | Activation | High |
| DLX3 | Activation | High |
| DSPP | Activation | High |
| CDX2 | Activation | High |
| BMP4 | Activation | — |
| BCL2L11 | Activation | — |
| LEP | Activation | — |
| CCL20 | Activation | — |
| CLDN1 | Repression | High |
| LAMB3 | Repression | High |
| DAP | Repression | High |
| AR | Repression | — |
| DACH1 | Repression | — |
| CCND1 | Unknown | — |
| CDH1 | Unknown | High |
| MMP2 | Unknown | — |
DNA Binding Profiles (JASPAR)
SMAD4 binds DNA as part of heteromeric complexes with R-SMADs (SMAD2/3 or SMAD1/5/9). The binding motif is the SMAD Binding Element (SBE): 5'-GTCT-3' or variants.
Upstream Regulators (TFs that Regulate SMAD4)
| TF | Regulation | Confidence |
|---|
| SMAD2 | Activation | — |
| FOXO1 | Activation | Low |
| FOXO3 | Activation | Low |
| HIF1A | Activation | — |
| KAT2B | Activation | — |
| KLF10 | Repression | High |
| OVOL2 | Repression | — |
| ETS1 | Unknown | — |
| FOS | Unknown | — |
| GLI1 | Unknown | — |
| HDAC4 | Unknown | — |
| JUNB | Unknown | — |
Section 10: Drug & Pharmacology Data
ChEMBL Target Information
| Target ID | Name | Type |
|---|
| CHEMBL5725109 | Mothers against decapentaplegic homolog 4 | SINGLE PROTEIN |
Associated assays: 6
PharmGKB Status
| PharmGKB ID | Symbol | VIP Status | CPIC Guideline |
|---|
| PA30527 | SMAD4 | Very Important Pharmacogene (VIP) ✓ | No |
Note: SMAD4 is designated as a Very Important Pharmacogene due to its role in TGF-β signaling, which is relevant to cancer drug response and targeted therapies. No specific CPIC dosing guidelines
currently exist.
Drug Targeting Information
SMAD4 itself is not a direct drug target (as a transcription factor, it is generally considered "undruggable"). However:
- The TGF-β/SMAD signaling pathway is therapeutically targeted
- SMAD4 loss/mutation status affects response to various cancer therapies
- Several TGF-β receptor inhibitors indirectly modulate SMAD4-dependent signaling
Section 11: Expression Profiles
Tissue Expression (Bgee)
Expression breadth: UBIQUITOUS
Total present calls: 288
Max expression score: 98.52
Average expression score: 88.12
TOP 30 Tissues by Expression Score
| Tissue | Expression Score | Quality |
|---|
| Ventricular zone | 98.52 | Gold |
| Ganglionic eminence | 97.77 | Gold |
| Calcaneal tendon | 97.63 | Gold |
| Adrenal tissue | 96.97 | Gold |
| Colonic epithelium | 96.66 | Gold |
| Stromal cell of endometrium | 96.05 | Gold |
| Tendon | 95.93 | Gold |
| Cortical plate | 95.88 | Gold |
| Left ovary | 95.79 | Gold |
| Gall bladder | 95.77 | Gold |
| Rectum | 95.74 | Gold |
| Popliteal artery | 95.65 | Gold |
| Tibial artery | 95.63 | Gold |
| Embryo | 95.54 | Gold |
| Body of uterus | 95.38 | Gold |
| Endocervix | 95.35 | Gold |
| Islet of Langerhans | 95.31 | Gold |
| Descending thoracic aorta | 95.23 | Gold |
| Right ovary | 95.18 | Gold |
| Mucosa of stomach | 94.97 | Gold |
| Aorta | 94.95 | Gold |
| Left lobe of thyroid gland | 94.90 | Gold |
| Right lobe of thyroid gland | 94.88 | Gold |
| Parietal pleura | 94.86 | Gold |
| Right coronary artery | 94.83 | Gold |
| Thyroid gland | 94.79 | Gold |
| Endometrium | 94.78 | Gold |
| Ovary | 94.70 | Gold |
| Gastrocnemius | 94.66 | Gold |
| Muscle of leg | 94.64 | Gold |
Expression pattern: SMAD4 is ubiquitously expressed across virtually all human tissues with consistently high expression scores.
Cell Type Expression (Bgee)
| Cell Type | Expression Score | Quality |
|---|
| Stromal cell of endometrium | 96.05 | Gold |
| Monocyte | 91.68 | Gold |
| Germinal epithelium of ovary | 92.57 | Gold |
Single-Cell Expression Data
| Dataset ID | Description | Species | Cells |
|---|
| E-MTAB-6142 | Transcriptomic characterization of human cell cycle | Homo sapiens | 96 |
Section 12: Disease Associations
Mendelian/Monogenic Disease Links (GenCC)
| Disease | OMIM/Orphanet | Classification | Inheritance | Source |
|---|
| Juvenile polyposis syndrome | OMIM:174900 | Definitive/Strong | Autosomal dominant | G2P, Invitae, PanelApp |
| Juvenile polyposis/HHT syndrome | OMIM:175050 | Definitive/Strong | Autosomal dominant | G2P, Invitae, PanelApp |
| Myhre syndrome | OMIM:139210 | Definitive/Strong | Autosomal dominant | G2P, Invitae, PanelApp |
| Hereditary hemorrhagic telangiectasia | ORPHANET:774 | Supportive | Autosomal dominant | Orphanet |
| Familial thoracic aortic aneurysm and dissection | ORPHANET:91387 | Supportive | Autosomal dominant | Orphanet |
| Familial pancreatic carcinoma | ORPHANET:1333 | Associated | — | Orphanet |
Orphanet Disease Associations
| Orphanet ID | Disease Name | Type | Gene Count | Phenotype Count |
|---|
| 2588 | Myhre syndrome | Malformation syndrome | 1 | 47 |
| 329971 | Generalized juvenile polyposis | Clinical subtype | 3 | 11 |
| 774 | Hereditary hemorrhagic telangiectasia | Disease | 4 | 36 |
| 91387 | Familial thoracic aortic aneurysm/dissection | Disease | 20 | 42 |
| 1333 | Familial pancreatic carcinoma | Disease | 9 | 24 |
Phenotype Associations (HPO)
Total HPO terms: 235
| HPO ID | Phenotype |
|---|
| HP:0000006 | Autosomal dominant inheritance |
| HP:0001009 | Telangiectasia |
| HP:0000214 | Lip telangiectasia |
| HP:0000227 | Tongue telangiectasia |
| HP:0000434 | Nasal mucosa telangiectasia |
| HP:0000524 | Conjunctival telangiectasia |
| HP:0000421 | Epistaxis |
| HP:0001342 | Cerebral hemorrhage |
| HP:0001249 | Intellectual disability |
| HP:0001263 | Global developmental delay |
| HP:0000252 | Microcephaly |
| HP:0001629 | Ventricular septal defect |
| HP:0001631 | Atrial septal defect |
| HP:0001635 | Congestive heart failure |
| HP:0001394 | Cirrhosis |
| HP:0001409 | Portal hypertension |
| HP:0000175 | Cleft palate |
| HP:0001156 | Brachydactyly |
| HP:0000470 | Short neck |
| HP:0000278 | Retrognathia |
| (+215 more phenotypes) | |
GWAS Associations
| Study ID | Trait | P-value | Mapped Region |
|---|
| GCST010043 | Asthma | 2.0e-09 | SMAD4 |
| GCST007800 | Asthma (childhood onset) | 4.0e-13 | SMAD4 - SRSF10P1 |
| GCST007798 | Asthma | 6.0e-08 | SMAD4 - SRSF10P1 |
| GCST002758 | Oligoclonal band status in MS | 8.0e-07 | ELAC1 - SMAD4 |
| GCST001547 | Immune response to anthrax vaccine | 1.0e-06 | SRSF10P1 - MEX3C |
| GCST009391 | Metabolite levels | 5.0e-06 | SRSF10P1 - MEX3C |
| GCST007797 | Asthma onset (childhood vs adult) | 5.0e-06 | SMAD4 - SRSF10P1 |
MSigDB Gene Set Memberships
Total gene sets: 1,152
Key pathway memberships include:
- KEGG_PATHWAYS_IN_CANCER
- REACTOME_SIGNALING_BY_TGF_BETA_RECEPTOR_COMPLEX
- GOBP_SMAD_PROTEIN_SIGNAL_TRANSDUCTION
- GOBP_TRANSFORMING_GROWTH_FACTOR_BETA_RECEPTOR_SIGNALING_PATHWAY
- GOBP_EPITHELIAL_TO_MESENCHYMAL_TRANSITION
- GOBP_CARDIAC_DEVELOPMENT pathways
- GOBP_IN_UTERO_EMBRYONIC_DEVELOPMENT
SUMMARY
SMAD4 (Mothers against decapentaplegic homolog 4) is a central mediator of TGF-β superfamily signaling, functioning as a common partner (Co-SMAD) that forms complexes with receptor-regulated SMADs
to regulate transcription of target genes.
Key Statistics
| Category | Count |
|---|
| Ensembl Transcripts | 49 |
| RefSeq mRNA Transcripts | 6 |
| Protein Length | 552 amino acids |
| PDB Structures | 12 |
| ClinVar Variants | 2,571 |
| Pathogenic Variants | 200+ |
| AlphaMissense Predictions | 3,631 |
| SpliceAI Predictions | 2,425 |
| Reactome Pathways | 21 |
| GO Annotations | 110+ |
| STRING Interactions | 4,822 |
| HPO Phenotypes | 235 |
| GWAS Associations | 7 |
| MSigDB Gene Sets | 1,152 |
Clinical Significance
SMAD4 mutations cause:
- Juvenile Polyposis Syndrome (JPS) — hamartomatous GI polyps with cancer risk
- Hereditary Hemorrhagic Telangiectasia (HHT) — vascular malformations
- JP-HHT syndrome — combined phenotype
- Myhre syndrome — developmental disorder with distinctive features
SMAD4 is a major tumor suppressor frequently inactivated in pancreatic, colorectal, and other cancers.
Reference compiled from biobtree integrated database queries. Data current as of database version.
I’ve compiled a comprehensive cross-database identifier and functional mapping reference for human SMAD4 covering all 12 sections. Key highlights:
Gene IDs: HGNC:6770 | Ensembl: ENSG00000141646 | Entrez: 4089 | OMIM: 600993
Location: Chr 18q21.2, 51,028,528-51,085,045 (+ strand)
Transcripts: 49 Ensembl transcripts, 6 RefSeq mRNAs (NM_005359 is MANE Select)
Protein: Q13485 (UniProt), 552 aa, contains MH1 and MH2 domains
Structures: 12 PDB structures (best resolution: 1.60Å), AlphaFold model with 74.56 pLDDT
Variants: 2,571 ClinVar entries (200+ pathogenic), 3,631 AlphaMissense predictions, 2,425 SpliceAI predictions
Pathways: Central to TGF-β/BMP/Activin signaling (21 Reactome pathways)
Interactions: 4,822 STRING interactions, key partners include SMAD2/3, SKI, CTNNB1, TGF-β receptors
As Transcription Factor: Regulates 172+ target genes including CDKN1A, ID1/2, HAMP
Expression: Ubiquitous across all tissues (288/295 conditions, avg score 88.12)
Diseases: Juvenile polyposis syndrome, Myhre syndrome, HHT, pancreatic cancer (tumor suppressor)