Receptor protein serine/threonine kinase; Thickveins (tkv) encodes a transforming growth factor beta type I receptor. Together with the product of put, it functions as a receptor of the product of dpp and therefore contributes to the BMP signaling pathway; Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily.

Protein decapentaplegic; Required during oogenesis for eggshell patterning and dorsal/ventral patterning of the embryo. Acts as a morphogen during embryogenesis to pattern the dorsal/ventral axis, specifying dorsal ectoderm and amnioserosa cell fate within the dorsal half of the embryo; this activity is antagonized by binding to sog and tsg. Induces the formation of visceral mesoderm and the heart in early embryos. Required later in embryogenesis for dorsal closure and patterning of the hindgut. Also functions postembryonically as a long-range morphogen during imaginal disk development [...]

Receptor protein serine/threonine kinase; Wishful thinking (wit) encodes a BMP Type II Receptor that, upon binding of the ligand encoded by gbb, makes a complex with either tkv or sax encoding BMP type I receptors. This complex initiates phosphorylation and nuclear translocation of the transcription factor encoded by Mad. wit product controls synaptic homeostasis and neurotransmission at the neuromusclular junction during larval development. It also regulates the peptidergic phenotype of several neurosecretory cells; Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase [...]

Receptor protein serine/threonine kinase; 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; Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily.

Serine/threonine-protein kinase receptor; Punt (put) encodes a transforming growth factor beta type II receptor that functions in both Dpp/BMP and Activin signaling. Pathway specificity in signaling output is determined by which type I receptor (Dpp/BMP or Activin one) is engaged in the complex with the product of put; Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily.

Crossveinless 2 (cv-2) encodes a secreted protein that binds BMPs, the BMP receptor encoded by tkv and Heparan Sulfate Proteoglycans. It either promotes BMP signaling, as in the developing crossveins, or inhibits BMP signaling, as in the early embryo.

Receptor protein serine/threonine kinase; Baboon (babo) encodes the type I receptor for the activin-like ligands encoded by daw, Actbeta and myo. There are three isoforms of the product of babo that differ only in their extracellular domain likely resulting in different ligand binding specificity. It can form a complex with the type II receptors put or wit in the presence of an activin like ligand. This results in the transcriptional regulation of activin responsive genes; Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily.

Mothers against decapentaplegic homolog; Medea (Med) encodes a protein that belongs to the highly conserved Smad family. It can bind its siblings encoded by Mad or Smox to facilitate signal transduction for the product of dpp or Activin ligands in the TGF-beta family. Med-complexes function as transcriptional regulators. Many developmental roles include dorsal-ventral patterning, patterning and proliferation of the wing disc and gene expression in the mushroom body of the larval brain.

Mothers against decapentaplegic homolog; Smad on X (Smox) encodes the primary transcription factor that mediates Activin signalling. Upon phosphorylation by the receptor encoded by babo, it forms a complex with the co-Smad protein encoded by Med. This complex translocates to the nucleus where it regulates expression of target genes.