SMAD4

This gene encodes a member of the Smad family of signal transduction proteins. Smad proteins are phosphorylated and activated by transmembrane serine-threonine receptor kinases in response to transforming growth factor (TGF)-beta signaling. The product of this gene forms homomeric complexes and heteromeric complexes with other activated Smad proteins, which then accumulate in the nucleus and regulate the transcription of target genes. This protein binds to DNA and recognizes an 8-bp palindromic sequence (GTCTAGAC) called the Smad-binding element (SBE). The protein acts as a tumor suppressor and inhibits epithelial cell proliferation. It may also have an inhibitory effect on tumors by reducing angiogenesis and increasng blood vessel hyperpermeability. The encoded protein is a crucial component of the bone morphogenetic protein signaling pathway. The Smad proteins are subject to complex regulation by post-translational modifications. Mutations or deletions in this gene have been shown to result in pancreatic cancer, juvenile polyposis syndrome, and hereditary hemorrhagic telangiectasia syndrome. [provided by RefSeq, Aug 2017]

Description

SMAD family member 4

Tissue specificity

Low tissue specificity

Subcell location

Nucleoplasm, Centrosome, Cytosol

Predicted location

Intracellular

Protein family

Cancer-related genes
Disease related genes
Human disease related genes
Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)
Transcription factors

Chromosome

18 (51028394 - 51085045)

Ensembl ID

ENSG00000141646  (ver. 103.38)

Orthologs

Mouse Smad4: ENSMUSG00000024515

UniProt

Q13485

neXtProt

NX_Q13485

Human splice variants
Mouse splice variants

Protein structure