Reactome: A Curated Pathway Database

Signaling by BMP (R-HSA-201451)

Species Homo sapiens


The TGF-beta/BMP (bone morphogenetic protein) pathway incorporates several signalling pathways that share most, but not all, components of a central signal transduction engine. The general signalling scheme is rather simple: upon binding of a ligand, an activated plasma membrane receptor complex is formed, which passes on the signal towards the nucleus through a phosphorylated receptor-activated SMAD (r-SMAD). In the nucleus, the activated r-SMAD promotes transcription in a complex with a closely-related helper molecule termed the Co-SMAD. However, this simple linear pathway expands into a network when various regulatory components and mechanisms are taken into account. The signalling pathway includes a great variety of different TGF-beta/BMP superfamily ligands and receptors, several types of the r-SMAD, and functionally critical negative feedback loops. The r-SMAD/Co-SMAD can interact with a great number of transcriptional co-activators/co-repressors to regulate positively or negatively effector genes, so that the interpretation of a signal depends on the cell-type and cross talk with other signalling pathways such as Notch, MAPK and Wnt. The pathway plays a number of different biological roles in the control of embryonic and adult cell proliferation and differentiation, and it is implicated in a great number of human diseases.

Locations in the PathwayBrowser
Additional Information
GO Biological Process BMP signaling pathway (0030509)
Literature References
pubMedId Title Journal Year
15621726 Bone morphogenetic proteins Growth Factors 2004