Bmp4

: It drives the formation of the heart, lungs, kidneys, and limbs. In the heart, it is essential for atrio-ventricular septation .

is a versatile secreted signaling molecule belonging to the TGF-beta superfamily . Known for its critical role in early development and tissue homeostasis, it acts as a "master controller" for cellular fate. Biological Structure & Mechanisms : It drives the formation of the heart,

: It primarily signals through two routes: Known for its critical role in early development

: Factors like Noggin, Chordin, and Gremlin act as "ligand traps," preventing BMP4 from binding to its receptors. This balance is vital for correct organ patterning. Key Functions in Development Key Functions in Development : Binding to Type

: Binding to Type I (ALK3/ALK6) and Type II (BMPR2) receptors triggers the phosphorylation of R-Smads (Smad1/5/8) , which complex with Smad4 and move into the nucleus to regulate gene expression.

: It can also directly activate pathways like ERK, p38 MAPK, and JNK to regulate migration and survival.