Guanylate cyclase 2C

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Guanylate cyclase 2C, also known as guanylyl cyclase C (GC-C), intestinal guanylate cyclase, guanylate cyclase-C receptor, or the heat-stable enterotoxin receptor (hSTAR) is an enzyme that in humans is encoded by the GUCY2C gene.[1][2]

Guanylyl cyclase is an enzyme found in the luminal aspect of intestinal epithelium and dopamine neurons in the brain.[3] The receptor has an extracellular ligand-binding domain, a single transmembrane region, a region with sequence similar to that of protein kinases, and a C-terminal guanylate cyclase domain. Tyrosine kinase activity mediates the GC-C signaling pathway within the cell.

Functions

GC-C is a key receptor for heat-stable enterotoxins that are responsible for acute secretory diarrhea.[4] Heat-stable enterotoxins are produced by pathogens such as Escherichia coli. Knockout mice deficient in the GC-C gene do not show secretory diarrhea on infection with E. coli, though they do with cholera toxin. This demonstrates the specificity of the GC-C receptor.

In medicine

Guanylate cyclase 2C is the target of linaclotide and plecanatide, oligopeptide agonists used for the treatment of chronic constipation.

References

  1. ^ "Entrez Gene: guanylate cyclase 2C (heat stable enterotoxin receptor)".
  2. ^ Mann EA, Swenson ES, Copeland NG, Gilbert DJ, Jenkins NA, Taguchi T, Testa JR, Giannella RA (June 1996). "Localization of the guanylyl cyclase C gene to mouse chromosome 6 and human chromosome 12p12". Genomics. 34 (2): 265–7. doi:10.1006/geno.1996.0284. PMID 8661067.
  3. ^ Intestinal Protein May Have Role in ADHD, Other Neurological Disorders. ScienceDaily (Aug. 11, 2011) [1]
  4. ^ Weiglmeier PR, Rösch P, Berkner H (August 2010). "Cure and Curse: E. coli Heat-Stable Enterotoxin and Its Receptor Guanylyl Cyclase C". Toxins. 2 (9): 2213–2229. doi:10.3390/toxins2092213. PMC 3153297. PMID 22069681.

Further reading

External links