tsg

Drosophila melanogaster

twisted gastrulation (tsg) encodes a BMP binding protein that makes a tripartite complex with the product of sog and a heterodimer formed with the products of dpp and scw. This complex is a favoured substrate for the product of tld, which processes the product of sog and liberates the heterodimer formed with the products of dpp and scw.

sax

Drosophila melanogaster

saxophone (sax) encodes a type I BMP receptor. Together with the BMP receptors encoded by tkv and put, it transduces signaling of the BMP ligands encoded by dpp, gbb and scw, in a wide variety of developmental processes including embryonic and imaginal disc patterning.

Ank3

Mus musculus

PHENOTYPE: Homozygotes for a mutation that selectively ablates gene expression in brain exhibit progressive ataxia, tremors, and a substantially reduced cerebellum deficient in Purkinje cells. Mutants are poor breeders and die by 4-6 months. [provided by MGI curators]

scw

Drosophila melanogaster

screw (scw) encodes a BMP-type ligand that forms a heterodimer with the product of dpp. The heterodimer is required to achieve the peak levels of BMP signal in the dorsal-most cells of the early blastoderm embryo that are necessary to specify the amnioserosa.

Mad

Drosophila melanogaster

Mothers against dpp (Mad) encodes the primary transcription factor that mediates cellular response to the BMP like ligands encoded by dpp, scw and gbb. Upon phosphorylation by either the products of sax or tkv (type I BMP receptors), it forms a complex with the product of Med and translocates to the nucleus where, together with cofactors, it regulates expression of BMP response target genes.