An Activating Mutation in the Kinase Homology Domain of the Natriuretic Peptide Receptor-2 Causes Extremely Tall Stature Without Skeletal Deformities
| Autor: | Monique Losekoot, Thomas Premsler, Jan M. Wit, Birgit Gassner, Claudia A. L. Ruivenkamp, Ruey-Bing Yang, Gijs W. E. Santen, Sabine E. Hannema, Wilma Oostdijk, Ferdinand Roelfsema, Thomas D. Mueller, Alberto M. Pereira, Heike Oberwinkler, André G. Uitterlinden, Sarina G. Kant, Hermine A. van Duyvenvoorde, Eric A. Espiner, Timothy C. R. Prickett, Michaela Kuhn, Annemieke J.M.H. Verkerk |
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| Přispěvatelé: | Pediatric surgery, Pathology, Internal Medicine |
| Rok vydání: | 2013 |
| Předmět: |
Male
medicine.medical_specialty medicine.drug_class Endocrinology Diabetes and Metabolism Clinical Biochemistry Mutant Biology Biochemistry Endocrinology Catalytic Domain Internal medicine medicine Natriuretic peptide Humans Receptor Bone growth Bone Diseases Developmental Bone Development Kinase Biochemistry (medical) HEK 293 cells Transfection Middle Aged NPR2 Body Height Enzyme Activation Amino Acid Substitution Mutation Receptors Atrial Natriuretic Factor |
| Zdroj: | Journal of Clinical Endocrinology and Metabolism, 98(12), E1988-E1998 Journal of Clinical Endocrinology and Metabolism, 98(12), E1988-E1998. The Endocrine Society Journal of Clinical Endocrinology and Metabolism, 98(12), E1988-E1998. Endocrine Society Hannema, S E, Van Duyvenvoorde, H A, Thomas, P, Yang, R B, Mueller, T D, Gassner, B, Oberwinkler, H, Roelfsema, F, Santen, G W E, Prickett, T, Kant, S G, Verkerk, A J M H, Uitterlinden, A G, Espiner, E, Ruivenkamp, C A L, Oostdijk, W, Pereira, A M, Losekoot, M, Kuhn, M & Wit, J M 2013, ' An activating mutation in the kinase homology domain of the natriuretic peptide receptor-2 causes extremely tall stature without skeletal deformities ', Journal of Clinical Endocrinology and Metabolism, vol. 98, no. 12, pp. E1988-E1998 . https://doi.org/10.1210/jc.2013-2358 |
| ISSN: | 1945-7197 0021-972X |
| DOI: | 10.1210/jc.2013-2358 |
| Popis: | Background: C-type natriuretic peptide (CNP)/natriuretic peptide receptor 2 (NPR2) signaling is essential for long bone growth. Enhanced CNP production caused by chromosomal translocations results in tall stature, a Marfanoid phenotype, and skeletal abnormalities.Asimilar phenotype was described in a family with an activating NPR2 mutation within the guanylyl cyclase domain. Case: Here we describe an extremely tall male without skeletal deformities, with a novel NPR2 mutation (p.Arg655Cys) located in the kinase homology domain. Objectives: The objective of the study was to investigate the functional and structural effects of the NPR2 mutation. Methods: Guanylyl cyclase activities of wild-type vs mutant NPR2 were analyzed in transfected human embryonic kidney 293 cells and in skin fibroblasts. The former were also used to study possible interactions between both isoforms. Homology modeling was performed to understand the molecular impact of the mutation. Results: CNP-stimulated cGMP production by the mutant NPR2 was markedly increased in patient skin fibroblasts and transfected human embryonic kidney 293 cells. The stimulatory effects of ATP on CNP-dependent guanylyl cyclase activity were augmented, suggesting that this novel mutation enhances both the responsiveness of NPR2 to CNP and its allosteric modulation/stabilization by ATP. Coimmunoprecipitation showed that wild-type and mutant NPR2 can form stable heterodimers, suggesting a dominant-positive effect. In accordance with augmented endogenous receptor activity, plasma N-terminal pro-CNP (a marker of CNP production in tissues) was reduced in the proband. Conclusions:Wereport the first activating mutation within the kinase homology domain of NPR2, resulting in extremely tall stature. Our observations emphasize the important role of this domain in the regulation of guanylyl cyclase activity and bone growth in response to CNP. |
| Databáze: | OpenAIRE |
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