NPR2 (gene)
Natriuretic peptide receptor B/guanylate cyclase B (atrionatriuretic peptide receptor B), also known as NPR2, is an atrial natriuretic peptide receptor. In humans it is encoded by the NPR2 gene. A mutation of the NPR2 gene can result in disproportionate dwarfism with short limbs. See also * Atrial natriuretic peptide receptor *Dwarfism Dwarfism is a condition wherein an organism is exceptionally small, and mostly occurs in the animal kingdom. In humans, it is sometimes defined as an adult height of less than , regardless of sex; the average adult height among people with dw ... References Further reading * * * * * * * * * * * * * * * * * External links * EC 4.6.1 {{membrane-protein-stub ...
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Atrial Natriuretic Peptide Receptor
An atrial natriuretic peptide receptor is a receptor for atrial natriuretic peptide. Mechanism NPRA and NPRB are linked to guanylyl cyclases, while NPRC is G-protein-linked and is a "clearance receptor" that acts to internalise and destroy the ligand. ANP activation of the ANP catalytic receptor will stimulate its intracellular guanylyl cyclase activity to convert GTP to cGMP. cGMP will then stimulate cGMP-dependent protein kinase (PKG), which will then induce smooth muscle relaxation. This is particularly important in the vasculature, where vascular smooth muscle will bind ANP released as a result of increasing right atrial pressure and will cause the walls of the vasculature to relax. This relaxation will decrease total peripheral resistance, which will in turn decrease venous return to the heart. The decrease in venous return to the heart will reduce the preload and will result in the heart's having to do less work. There is also a soluble guanylyl cyclase that cannot ...
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