{"entryType":"UniProtKB reviewed (Swiss-Prot)","primaryAccession":"Q13485","secondaryAccessions":["A8K405"],"uniProtkbId":"SMAD4_HUMAN","entryAudit":{"firstPublicDate":"2001-05-04","lastAnnotationUpdateDate":"2026-06-10","lastSequenceUpdateDate":"1996-11-01","entryVersion":256,"sequenceVersion":1},"annotationScore":5.0,"organism":{"scientificName":"Homo sapiens","commonName":"Human","taxonId":9606,"lineage":["Eukaryota","Metazoa","Chordata","Craniata","Vertebrata","Euteleostomi","Mammalia","Eutheria","Euarchontoglires","Primates","Haplorrhini","Catarrhini","Hominidae","Homo"]},"proteinExistence":"1: Evidence at protein level","proteinDescription":{"recommendedName":{"fullName":{"evidences":[{"evidenceCode":"ECO:0000312","source":"HGNC","id":"HGNC:6770"}],"value":"SMAD family member 4"},"shortNames":[{"evidences":[{"evidenceCode":"ECO:0000305"}],"value":"SMAD 4"},{"value":"hSMAD4"}]},"alternativeNames":[{"fullName":{"value":"Deletion target in pancreatic carcinoma 4"}},{"fullName":{"value":"Mothers against decapentaplegic homolog 4"},"shortNames":[{"value":"MAD homolog 4"},{"value":"Mothers against DPP homolog 4"}]}]},"genes":[{"geneName":{"evidences":[{"evidenceCode":"ECO:0000312","source":"HGNC","id":"HGNC:6770"}],"value":"SMAD4"},"synonyms":[{"value":"DPC4"},{"value":"MADH4"}]}],"comments":[{"texts":[{"evidences":[{"evidenceCode":"ECO:0000250"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"17327236"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"25514493"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"9389648"}],"value":"In muscle physiology, plays a central role in the balance between atrophy and hypertrophy. When recruited by MSTN, promotes atrophy response via phosphorylated SMAD2/4. MSTN decrease causes SMAD4 release and subsequent recruitment by the BMP pathway to promote hypertrophy via phosphorylated SMAD1/5/8. Acts synergistically with SMAD1 and YY1 in bone morphogenetic protein (BMP)-mediated cardiac-specific gene expression. Binds to SMAD binding elements (SBEs) (5'-GTCT/AGAC-3') within BMP response element (BMPRE) of cardiac activating regions (By similarity). Common SMAD (co-SMAD) is the coactivator and mediator of signal transduction by TGF-beta (transforming growth factor). Component of the heterotrimeric SMAD2/SMAD3-SMAD4 complex that forms in the nucleus and is required for the TGF-mediated signaling (PubMed:25514493). Promotes binding of the SMAD2/SMAD4/FAST-1 complex to DNA and provides an activation function required for SMAD1 or SMAD2 to stimulate transcription. Component of the multimeric SMAD3/SMAD4/JUN/FOS complex which forms at the AP1 promoter site; required for synergistic transcriptional activity in response to TGF-beta. May act as a tumor suppressor. Positively regulates PDPK1 kinase activity by stimulating its dissociation from the 14-3-3 protein YWHAQ which acts as a negative regulator"}],"commentType":"FUNCTION"},{"texts":[{"evidences":[{"evidenceCode":"ECO:0000250","source":"UniProtKB","id":"O70437"},{"evidenceCode":"ECO:0000250","source":"UniProtKB","id":"P97471"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"10660046"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"11224571"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"11741830"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"11818334"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"12370310"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"12941698"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"14525983"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"14630787"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"14671321"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"15350224"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"15799969"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"15820681"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"15881652"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"16777850"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"17099224"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"17327236"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"18568018"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"19135894"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"24324267"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"25310401"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"25514493"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"26878725"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"39143229"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"9670020"},{"evidenceCode":"ECO:0000269","source":"PubMed","id":"9707553"}],"value":"Monomer; in the absence of TGF-beta activation (PubMed:9670020). Heterotrimer; on TGF-beta activation (PubMed:15799969). Heterotrimer composed of two molecules of a C-terminally phosphorylated R-SMAD molecule, SMAD2 or SMAD3, and one molecule of SMAD4 to form the transcriptional active SMAD2/SMAD3-SMAD4 complex (PubMed:15350224, PubMed:15799969). Found in a ternary complex composed of SMAD4, STK11/LKB1 and STK11IP. Found in a complex with SMAD1 and YY1 (By similarity). Identified in a complex that contains at least ZNF451, SMAD2, SMAD3 and SMAD4 (PubMed:24324267). Interacts with ATF2, COPS5, DACH1, MSG1, SKI, STK11/LKB1, STK11IP and TRIM33. Associates with ZNF423 or ZNF521 in response to BMP2 leading to activate transcription of BMP target genes. Interacts with USP9X. Interacts (via the MH1 and MH2 domains) with RBPMS. Interacts with WWTR1 (via coiled-coil domain). Interacts with CITED1 and CITED2. Interacts with PDPK1 (via PH domain) (By similarity). Interacts with VPS39; this interaction affects heterodimer formation with SMAD3, but not with SMAD2, and leads to inhibition of SMAD3-dependent transcription activation. Interactions with VPS39 and SMAD2 may be mutually exclusive. Interacts (via MH2 domain) with ZNF451 (via N-terminal zinc-finger domains) (PubMed:24324267). Interacts with ZC3H3 (By similarity). Interacts weakly with ZNF8 (PubMed:12370310). Interacts with NUP93 and IPO7; translocates SMAD4 to the nucleus through the NPC upon BMP7 stimulation resulting in activation of SMAD4 signaling (PubMed:26878725). Interacts with CREB3L1, the interaction takes place upon TGFB1 induction and SMAD4 acts as a CREB3L1 coactivator to induce the expression of genes involved in the assembly of collagen extracellular matrix (PubMed:25310401). Interacts with DLX1 (PubMed:14671321). Interacts with ZBTB7A; the interaction is direct and stimulated by TGFB1 (PubMed:25514493). Interacts with CREBBP; the recruitment of this transcriptional coactivator is negatively regulated by ZBTB7A (PubMed:25514493). Interacts with EP300; the interaction with this transcriptional coactivator is negatively regulated by ZBTB7A (PubMed:25514493). Interacts with HDAC1 (PubMed:25514493). Interacts (via MH2 domain) with ZMIZ1 (via SP-RING-type domain); in the TGF-beta signaling pathway increases the activity of the SMAD3/SMAD4 transcriptional complex (PubMed:16777850). Interacts (via N-terminus) with TSC22D1 (PubMed:15881652). Interacts with AMDHD1; this interaction inhibits ubiquitination and proteasomal degradation of SMAD4 (PubMed:39143229)"}],"commentType":"SUBUNIT"},{"commentType":"INTERACTION","interactions":[{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P36896","geneName":"ACVR1B","intActId":"EBI-1384128"},"numberOfExperiments":4,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P31749","geneName":"AKT1","intActId":"EBI-296087"},"numberOfExperiments":6,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P05067","geneName":"APP","intActId":"EBI-77613"},"numberOfExperiments":3,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P10398","geneName":"ARAF","intActId":"EBI-365961"},"numberOfExperiments":6,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q92747","geneName":"ARPC1A","intActId":"EBI-1020827"},"numberOfExperiments":6,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9Y2T1","geneName":"AXIN2","intActId":"EBI-4400025"},"numberOfExperiments":4,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9NXR7","geneName":"BABAM2","intActId":"EBI-949389"},"numberOfExperiments":5,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P62324","geneName":"BTG1","intActId":"EBI-742279"},"numberOfExperiments":4,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9Y297","geneName":"BTRC","intActId":"EBI-307461"},"numberOfExperiments":2,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q96HB5","geneName":"CCDC120","intActId":"EBI-744556"},"numberOfExperiments":4,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P24385","geneName":"CCND1","intActId":"EBI-375001"},"numberOfExperiments":4,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q00534","geneName":"CDK6","intActId":"EBI-295663"},"numberOfExperiments":3,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q969H4","geneName":"CNKSR1","intActId":"EBI-741671"},"numberOfExperiments":5,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9UI36","geneName":"DACH1","intActId":"EBI-347111"},"numberOfExperiments":7,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9NPI6","geneName":"DCP1A","intActId":"EBI-374238"},"numberOfExperiments":5,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q92988","geneName":"DLX4","intActId":"EBI-1752755"},"numberOfExperiments":5,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P29320","geneName":"EPHA3","intActId":"EBI-1641575"},"numberOfExperiments":6,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P21860","geneName":"ERBB3","intActId":"EBI-720706"},"numberOfExperiments":6,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"P43268-3","geneName":"ETV4","intActId":"EBI-12130722"},"numberOfExperiments":3,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q01844","geneName":"EWSR1","intActId":"EBI-739737"},"numberOfExperiments":3,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q00597","geneName":"FANCC","intActId":"EBI-81625"},"numberOfExperiments":5,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9NW38","geneName":"FANCL","intActId":"EBI-2339898"},"numberOfExperiments":6,"organismDiffer":false},{"interactantOne":{"uniProtKBAccession":"Q13485","intActId":"EBI-347263"},"interactantTwo":{"uniProtKBAccession":"Q9GZV9","geneName":"FGF23","intActId":"EBI-6594125"},"numberOfExperiments":3,"orga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