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AAT Bioquest

What do the different types of enzyme-linked receptors do?

Posted February 9, 2024


Answer

The five main types of enzyme-linked receptors include: Receptor tyrosine kinases, tyrosine-kinase associated receptors, receptor serine/threonine kinase, receptor tyrosine phosphatases, receptor guanylyl cyclases.

  • Receptor tyrosine kinases activate the kinase enzyme and are able to phosphorylate tyrosine residues. This activation typically triggers signaling cascades involved in cell growth, differentiation, and survival. One example includes epidermal growth factor receptor (EGFR). 
  • Tyrosine-kinase associated receptors interact with proteins that have tyrosine kinase activity. The associated kinases are responsible for transmitting signals within the cell. Cytokine Receptors are a common example, where the associated kinases play a crucial role in immune response and inflammation. 
  • Receptor serine/threonine kinase play crucial roles in shaping embryonic development, controlling apoptosis, regulating cell growth, and impacting various disease processes (e.g. atherosclerosis). Transforming growth factor-beta receptors (TGF-βR) is a common example of this enzyme-linked receptor. 
  • Receptor tyrosine phosphatases are involved in removing phosphate groups from tyrosine residues. They play a role in regulating the phosphorylation state in various signaling molecules. This process can modulate cellular responses and control cell proliferation and adhesion. 
  • Receptor guanylyl cyclases generate the intracellular signaling molecule cyclic GMP (cGMP); they do this by facilitating the transformation of GTP to cGMP and pyrophosphate.  
Additional resources

Signaling through Enzyme-Linked Cell-Surface Receptors

Cell Signaling

Screen Quest™ Colorimetric ELISA cAMP Assay Kit