Related Experiment Video
Updated: Jun 18, 2026
12:52
Detection of Signaling Effector-Complexes Downstream of BMP4 Using in situ PLA, a Proximity Ligation Assay
Published on: March 3, 2011
Recent advances in BMP receptor signaling
Christina Sieber1, Jessica Kopf, Christian Hiepen
1Institute for Chemistry and Biochemistry, Freie Universität Berlin, Thielallee 63, 14195 Berlin, Germany.
Cytokine & Growth Factor Reviews
|November 10, 2009
Summary
Bone Morphogenetic Proteins (BMPs) are crucial for development and repair, signaling through receptor complexes. Understanding these pathways reveals diverse cellular effects and potential therapeutic targets.
Area of Science:
- Molecular Biology
- Cell Signaling
- Developmental Biology
Background:
- Bone Morphogenetic Proteins (BMPs) are key regulators of organ development and tissue regeneration.
- BMP signaling is mediated by heteromeric complexes of type I and type II serine/threonine kinase receptors.
- Ligand-receptor interactions and co-receptor recruitment modulate BMP signal propagation.
Purpose of the Study:
- To provide a current overview of the key components regulating BMP signaling pathways.
- To elucidate the molecular mechanisms underlying diverse cellular effects induced by BMPs.
- To highlight the role of BMPs in development and adult physiological/pathophysiological conditions.
Main Methods:
- Review of existing literature on BMP signaling pathways.
- Analysis of Smad-dependent and non-Smad signaling cascades.
- Description of BMP-induced cellular responses, including cytoskeletal rearrangements.
Main Results:
- Activated type I receptors initiate the Smad pathway, leading to transcriptional regulation.
- Smads act as signaling platforms for other pathways, fine-tuning BMP signal transduction.
- BMPs elicit a wide range of cellular effects, including stem cell maintenance, migration, differentiation, proliferation, and apoptosis.
Conclusions:
- The cellular context dictates the molecular mechanisms by which BMPs induce diverse effects.
- Understanding BMP signaling players is crucial for directing cellular outcomes.
- BMPs are implicated in both developmental processes and conditions in adult organisms.
Related Concept Videos
01:15Amplifying Signals via Second Messengers
Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
01:27Transducer Mechanism: Enzyme-Linked Receptors
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
01:12What are Second Messengers?
Because many receptor binding ligands are hydrophilic, they do not cross the cell membrane and thus their message must be relayed to a second messenger on the inside. There are several second messenger pathways, each with their own way of relaying information. G-protein coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol path is active when the receptor induces phospholipase C to hydrolyze the phospholipid,...
01:22Amplifying Signals via Enzymatic Cascade
When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze the...
01:11IP3/DAG Signaling Pathway
Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and produces two-second...
01:30Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...