Intracellular trafficking and metabolic turnover ofligand-bound guanylyl cyclase/atrial natriuretic peptide receptor-A into subcellular compartments
Identifieur interne : 002214 ( Main/Exploration ); précédent : 002213; suivant : 002215Intracellular trafficking and metabolic turnover ofligand-bound guanylyl cyclase/atrial natriuretic peptide receptor-A into subcellular compartments
Auteurs : Kailash N. Pandey [États-Unis]Source :
- Molecular and Cellular Biochemistry [ 0300-8177 ] ; 2002-01-01.
English descriptors
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Abstract
Abstract: Atrial natriuretic peptide (ANP) is the first described member of the natriuretic peptide hormone family. ANP elicits natriuretic, diuretic, vasorelaxant and antiproliferative effects, important factors in the control of blood pressure homeostasis. One of the principal loci involved in the regulatory action of ANP is the guanylyl cyclase-linked ANP-receptor which has been designated as NPRA, also referred to as GC-A, whose ANP-binding efficiency and guanylyl cyclase activity vary remarkably in different target tissues. However, the cellular and molecular basis of these activities and the functional expression and regulation of NPRA are not well understood. The mature form of receptor resides in the plasma membrane and consists of an extracellular ligand-binding domain, a single transmembrane-spanning region, and intracellular protein kinase-like homology and guanylyl cyclase catalytic domains. In this review, emphasis has been placed on the interaction of ANP with NPRA, the ligand-mediated endocytosis, trafficking, and subcellular distribution of ligand-receptor complexes from cell surface to the intracellular compartments. Furthermore, it is implicated that after internalization, the ANP/NPRA complexes dissociate into the subcellular compartments and a population of receptor recycles back to the plasma membrane. This is an interesting area of research in the natriuretic peptide receptor field because there is currently debate over whether ANP/NPRA complexes internalize at all or whether cell utilizes some other mechanisms to release ANP from the bound receptor molecules. Indeed, controversy exist since it has been previously reported by default that among the three natriuretic peptide receptors only NPRC internalizes with bound ligand. Hence, from a thematic standpoint it is clearly evident that there is a current need to review this subject and provide a consensus forum that establishes the cellular trafficking, sequestration and processing of ANP/NPRA complexes in intact cells. Towards this aim the cellular life-cycle of NPRA will be described in the context of ANP-binding, internalization, metabolic processing, and/or inactivation, down-regulation, and degradation of ligand-receptor complexes in model cell systems.
Url:
DOI: 10.1023/A:1014240006767
Affiliations:
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<front><div type="abstract" xml:lang="en">Abstract: Atrial natriuretic peptide (ANP) is the first described member of the natriuretic peptide hormone family. ANP elicits natriuretic, diuretic, vasorelaxant and antiproliferative effects, important factors in the control of blood pressure homeostasis. One of the principal loci involved in the regulatory action of ANP is the guanylyl cyclase-linked ANP-receptor which has been designated as NPRA, also referred to as GC-A, whose ANP-binding efficiency and guanylyl cyclase activity vary remarkably in different target tissues. However, the cellular and molecular basis of these activities and the functional expression and regulation of NPRA are not well understood. The mature form of receptor resides in the plasma membrane and consists of an extracellular ligand-binding domain, a single transmembrane-spanning region, and intracellular protein kinase-like homology and guanylyl cyclase catalytic domains. In this review, emphasis has been placed on the interaction of ANP with NPRA, the ligand-mediated endocytosis, trafficking, and subcellular distribution of ligand-receptor complexes from cell surface to the intracellular compartments. Furthermore, it is implicated that after internalization, the ANP/NPRA complexes dissociate into the subcellular compartments and a population of receptor recycles back to the plasma membrane. This is an interesting area of research in the natriuretic peptide receptor field because there is currently debate over whether ANP/NPRA complexes internalize at all or whether cell utilizes some other mechanisms to release ANP from the bound receptor molecules. Indeed, controversy exist since it has been previously reported by default that among the three natriuretic peptide receptors only NPRC internalizes with bound ligand. Hence, from a thematic standpoint it is clearly evident that there is a current need to review this subject and provide a consensus forum that establishes the cellular trafficking, sequestration and processing of ANP/NPRA complexes in intact cells. Towards this aim the cellular life-cycle of NPRA will be described in the context of ANP-binding, internalization, metabolic processing, and/or inactivation, down-regulation, and degradation of ligand-receptor complexes in model cell systems.</div>
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