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Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva

Bone morphogenetic protein (BMP) receptor kinases are tightly regulated to control development and tissue homeostasis. Mutant receptor kinase domains escape regulation leading to severely degenerative diseases and represent an important therapeutic target. Fibrodysplasia ossificans progressiva (FOP)...

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Autores principales: Chaikuad, Apirat, Alfano, Ivan, Kerr, Georgina, Sanvitale, Caroline E., Boergermann, Jan H., Triffitt, James T., von Delft, Frank, Knapp, Stefan, Knaus, Petra, Bullock, Alex N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Society for Biochemistry and Molecular Biology 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3481300/
https://www.ncbi.nlm.nih.gov/pubmed/22977237
http://dx.doi.org/10.1074/jbc.M112.365932
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author Chaikuad, Apirat
Alfano, Ivan
Kerr, Georgina
Sanvitale, Caroline E.
Boergermann, Jan H.
Triffitt, James T.
von Delft, Frank
Knapp, Stefan
Knaus, Petra
Bullock, Alex N.
author_facet Chaikuad, Apirat
Alfano, Ivan
Kerr, Georgina
Sanvitale, Caroline E.
Boergermann, Jan H.
Triffitt, James T.
von Delft, Frank
Knapp, Stefan
Knaus, Petra
Bullock, Alex N.
author_sort Chaikuad, Apirat
collection PubMed
description Bone morphogenetic protein (BMP) receptor kinases are tightly regulated to control development and tissue homeostasis. Mutant receptor kinase domains escape regulation leading to severely degenerative diseases and represent an important therapeutic target. Fibrodysplasia ossificans progressiva (FOP) is a rare but devastating disorder of extraskeletal bone formation. FOP-associated mutations in the BMP receptor ALK2 reduce binding of the inhibitor FKBP12 and promote leaky signaling in the absence of ligand. To establish structural mechanisms of receptor regulation and to address the effects of FOP mutation, we determined the crystal structure of the cytoplasmic domain of ALK2 in complex with the inhibitors FKBP12 and dorsomorphin. FOP mutations break critical interactions that stabilize the inactive state of the kinase, thereby facilitating structural rearrangements that diminish FKBP12 binding and promote the correct positioning of the glycine-serine-rich loop and αC helix for kinase activation. The balance of these effects accounts for the comparable activity of R206H and L196P. Kinase activation in the clinically benign mutant L196P is far weaker than R206H but yields equivalent signals due to the stronger interaction of FKBP12 with R206H. The presented ALK2 structure offers a valuable template for the further design of specific inhibitors of BMP signaling.
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spelling pubmed-34813002012-10-29 Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva Chaikuad, Apirat Alfano, Ivan Kerr, Georgina Sanvitale, Caroline E. Boergermann, Jan H. Triffitt, James T. von Delft, Frank Knapp, Stefan Knaus, Petra Bullock, Alex N. J Biol Chem Protein Structure and Folding Bone morphogenetic protein (BMP) receptor kinases are tightly regulated to control development and tissue homeostasis. Mutant receptor kinase domains escape regulation leading to severely degenerative diseases and represent an important therapeutic target. Fibrodysplasia ossificans progressiva (FOP) is a rare but devastating disorder of extraskeletal bone formation. FOP-associated mutations in the BMP receptor ALK2 reduce binding of the inhibitor FKBP12 and promote leaky signaling in the absence of ligand. To establish structural mechanisms of receptor regulation and to address the effects of FOP mutation, we determined the crystal structure of the cytoplasmic domain of ALK2 in complex with the inhibitors FKBP12 and dorsomorphin. FOP mutations break critical interactions that stabilize the inactive state of the kinase, thereby facilitating structural rearrangements that diminish FKBP12 binding and promote the correct positioning of the glycine-serine-rich loop and αC helix for kinase activation. The balance of these effects accounts for the comparable activity of R206H and L196P. Kinase activation in the clinically benign mutant L196P is far weaker than R206H but yields equivalent signals due to the stronger interaction of FKBP12 with R206H. The presented ALK2 structure offers a valuable template for the further design of specific inhibitors of BMP signaling. American Society for Biochemistry and Molecular Biology 2012-10-26 2012-09-12 /pmc/articles/PMC3481300/ /pubmed/22977237 http://dx.doi.org/10.1074/jbc.M112.365932 Text en © 2012 by The American Society for Biochemistry and Molecular Biology, Inc. Author's Choice—Final version full access. Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) applies to Author Choice Articles
spellingShingle Protein Structure and Folding
Chaikuad, Apirat
Alfano, Ivan
Kerr, Georgina
Sanvitale, Caroline E.
Boergermann, Jan H.
Triffitt, James T.
von Delft, Frank
Knapp, Stefan
Knaus, Petra
Bullock, Alex N.
Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva
title Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva
title_full Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva
title_fullStr Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva
title_full_unstemmed Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva
title_short Structure of the Bone Morphogenetic Protein Receptor ALK2 and Implications for Fibrodysplasia Ossificans Progressiva
title_sort structure of the bone morphogenetic protein receptor alk2 and implications for fibrodysplasia ossificans progressiva
topic Protein Structure and Folding
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3481300/
https://www.ncbi.nlm.nih.gov/pubmed/22977237
http://dx.doi.org/10.1074/jbc.M112.365932
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