Tgf Beta Ligands
Tgf Beta Ligands - Related Videos
09:18
Spheroid Assay to Measure TGF-β-induced Invasion
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Cited by 41 •
2011
An assay to quantitatively measure Transforming Growth Factor (TGF)-β-induced invasion in 3-dimensional collagen gels is described. This assay takes advantage of the MCF10A series of cell lines, which represent different stages of breast cancer development. This method can be adopted to be used with other cell lines and might be used to investigate other potential activators or inhibitors of invasion.
09:40
Analysis of the c-KIT Ligand Promoter Using Chromatin Immunoprecipitation
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2017
DNA-protein interactions are essential for multiple biological processes. During the evaluation of cellular functions, the analysis of DNA-protein interactions is indispensable for understanding gene regulation. Chromatin immunoprecipitation (ChIP) is a powerful tool to analyze such interactions in vivo.
02:40
Ligand Binding Sites
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2020
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands. Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
02:51
Metal-Ligand Bonds
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2020
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes. In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
00:49
Ligand Binding and Linkage
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2020
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...
FAQs
Signaling begins when a ligand engages receptor components in sequence: type II serine/threonine kinase receptors bind the ligand and activate type I receptors through phosphorylation. The type I receptors then initiate Smad protein activation. This receptor relay converts an extracellular signal into intracellular information that can reach the nucleus and change transcription, linking ligand binding to altered cell behavior.
Smad complexes provide a direct route from activated receptors to gene regulation. Once activated, they enter the nucleus and alter gene transcription, allowing the signal to influence cell behavior. Additional non-Smad pathways can modify this response, so understanding a ligand’s effects requires considering both transcriptional Smad activity and signaling processes outside the Smad route.
Smad activation does not fully define the response, because additional non-Smad pathways can modify signaling. Consequently, studies that observe receptor activation or nuclear Smad activity may still need to consider broader pathway effects when explaining changes in proliferation, differentiation, extracellular matrix production, immune regulation, or tissue repair.
The signaling response can influence several distinct aspects of cell and tissue biology, including proliferation, differentiation, extracellular matrix production, immune regulation, and tissue repair. These outcomes show why pathway activity must be interpreted in relation to the biological process being studied, rather than treated as a single uniform effect across developmental or adult tissue contexts.
Researchers examine these ligands in developmental biology and adult tissues because their signaling regulates cell behavior across both settings. The same framework supports investigations of tissue repair and regenerative medicine, where changes in proliferation, differentiation, or extracellular matrix production are relevant to understanding how tissues respond and how repair-related biology may be regulated.
These ligands are relevant because their signaling affects extracellular matrix production, cell proliferation, differentiation, and broader tissue behavior. Those outcomes provide a biological basis for examining relationships between pathway activity and fibrosis or cancer. Studies can connect receptor-driven transcriptional changes with alterations in tissue structure or cell behavior associated with these research areas.