. "FUNCTION: Binds to regulatory elements in target promoter regions (By similarity). Antagonist of signaling by TGF-beta (transforming growth factor) type 1 receptor superfamily members; has been shown to inhibit selectively BMP (bone morphogenetic proteins) signaling by competing with the co-SMAD SMAD4 for receptor-activated SMAD1. SMAD6 is an inhibitory SMAD (I-SMAD) or antagonistic SMAD. Inhibits phosphorylation activity of SMAD1 induced by BMP type IB receptor and interferes with the phosphorylation of SMAD2 and the subsequent heteromerization with SMAD4. SUBUNIT: Interacts with STAMBP and PRKX (By similarity). Interacts with RNF111 and AXIN1. Interacts with TGF-beta type I receptor superfamily members. Interacts with NEDD4L. Interacts with WWP1. SUBCELLULAR LOCATION: Nucleus (By similarity). TISSUE SPECIFICITY: Ubiquitous in various organs, with higher levels in lung. PTM: Ubiquitinated by WWP1. SIMILARITY: Belongs to the dwarfin/SMAD family. SIMILARITY: Contains 1 MH1 (MAD homology 1) domain. SIMILARITY: Contains 1 MH2 (MAD homology 2) domain. GENE SYNONYMS:Smad6 Madh6 Madh7 Msmad6. COPYRIGHT: Protein annotation is derived from the UniProt Consortium (http://www.uniprot.org/). Distributed under the Creative Commons Attribution-NoDerivs License."^^ . "SEQUENCE 495 AA; 53714 MW; D9282D42B120C507 CRC64;"^^ . . . . . . "SMAD6_MOUSE"^^ . "Smad6"^^ . "Mothers against DPP homolog 6"^^ . "MAD homolog 6"^^ . "SMAD 6"^^ . "SMAD family member 6"^^ . "Mad homolog 7"^^ . . . "MFRSKRSGLVRRLWRSRVVPDREEGSGGGGGVDEDGSLGSRAEPAPRAREGGGCSRSEVRSVAPRRPRDAVGPRGAAIAGRRRRTGGLPRPVSESGAGAGGSPLDVAEPGGPGWLPESDCETVTCCLFSERDAAGAPRDSGDPQARQSPEPEEGGGPRSREARSRLLLLEQELKTVTYSLLKRLKERSLDTLLEAVESRGGVPGGCVLVPRADLRLGGQPAPPQLLLGRLFRWPDLQHAVELKPLCGCHSFTAAADGPTVCCNPYHFSRLCGPESPPPPYSRLSPPDQYKPLDLSDSTLSYTETEATNSLITAPGEFSDASMSPDATKPSHWCSVAYWEHRTRVGRLYAVYDQAVSIFYDLPQGSGFCLGQLNLEQRSESVRRTRSKIGFGILLSKEPDGVWAYNRGEHPIFVNSPTLDAPGGRALVVRKVPPGYSIKVFDFERSGLLQHADAAHGPYDPHSVRISFAKGWGPCYSRQFITSCPCWLEILLNNHR"^^ . "Mothers against decapentaplegic homolog 6"^^ .