Structural basis for activation of the titin kinase domain during myofibrillogenesis
The giant muscle protein titin (connectin) is essential in the temporal and spatial control of the assembly of the highly ordered sarcomeres (contractile units) of striated muscle. Here we present the crystal structure of titin's only catalytic domain, an autoregulated serine kinase (titin kina...
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| Veröffentlicht in: | Nature (London) 1998-10, Vol.395 (6705), p.863-869 |
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| creator | Wilmanns, Matthias Gautel, Mathias Mayans, Olga van der Ven, Peter F. M Wilm, Matthias Mues, Alexander Young, Paul Fürst, Dieter O |
| description | The giant muscle protein titin (connectin) is essential in the temporal and spatial control of the assembly of the highly ordered sarcomeres (contractile units) of striated muscle. Here we present the crystal structure of titin's only catalytic domain, an autoregulated serine kinase (titin kinase). The structure shows how the active site is inhibited by a tyrosine of the kinase domain. We describe a dual mechanism of activation of titin kinase that consists of phosphorylation of this tyrosine and binding of calcium/calmodulin to the regulatory tail. The serine kinase domain of titin is the first known non-arginine–aspartate kinase to be activated by phosphorylation. The phosphorylated tyrosine is not located in the activation segment, as in other kinases, but in the P+ 1 loop, indicating that this tyrosine is a binding partner of the titinkinase substrate. Titin kinase phosphorylates the muscle protein telethonin in early differentiating myocytes, indicating that this kinase may act in myofibrillogenesis. |
| doi_str_mv | 10.1038/27603 |
| format | Article |
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M ; Wilm, Matthias ; Mues, Alexander ; Young, Paul ; Fürst, Dieter O</creator><creatorcontrib>Wilmanns, Matthias ; Gautel, Mathias ; Mayans, Olga ; van der Ven, Peter F. M ; Wilm, Matthias ; Mues, Alexander ; Young, Paul ; Fürst, Dieter O</creatorcontrib><description>The giant muscle protein titin (connectin) is essential in the temporal and spatial control of the assembly of the highly ordered sarcomeres (contractile units) of striated muscle. Here we present the crystal structure of titin's only catalytic domain, an autoregulated serine kinase (titin kinase). The structure shows how the active site is inhibited by a tyrosine of the kinase domain. We describe a dual mechanism of activation of titin kinase that consists of phosphorylation of this tyrosine and binding of calcium/calmodulin to the regulatory tail. The serine kinase domain of titin is the first known non-arginine–aspartate kinase to be activated by phosphorylation. The phosphorylated tyrosine is not located in the activation segment, as in other kinases, but in the P+ 1 loop, indicating that this tyrosine is a binding partner of the titinkinase substrate. Titin kinase phosphorylates the muscle protein telethonin in early differentiating myocytes, indicating that this kinase may act in myofibrillogenesis.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/27603</identifier><identifier>PMID: 9804419</identifier><identifier>CODEN: NATUAS</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Amino Acid Sequence ; Animals ; Biological and medical sciences ; Catalytic Domain ; Cell Differentiation ; Cell differentiation, maturation, development, hematopoiesis ; Cell Line ; Cell physiology ; Connectin ; Crystallography ; Crystallography, X-Ray ; Enzyme Activation ; Fundamental and applied biological sciences. Psychology ; Humanities and Social Sciences ; Humans ; Models, Molecular ; Molecular and cellular biology ; Molecular Sequence Data ; multidisciplinary ; Muscle Proteins - antagonists & inhibitors ; Muscle Proteins - chemistry ; Muscle Proteins - metabolism ; Muscle, Skeletal - cytology ; Muscle, Skeletal - enzymology ; Muscular system ; Myofibrils - enzymology ; Phosphorylation ; Protein Conformation ; Protein Kinase Inhibitors ; Protein Kinases - chemistry ; Protein Kinases - metabolism ; Proteins ; Recombinant Proteins - chemistry ; Science ; Science (multidisciplinary) ; Sequence Homology, Amino Acid ; Substrate Specificity ; Tyrosine - metabolism</subject><ispartof>Nature (London), 1998-10, Vol.395 (6705), p.863-869</ispartof><rights>Macmillan Magazines Ltd. 1998</rights><rights>1999 INIST-CNRS</rights><rights>Copyright Macmillan Journals Ltd. 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The serine kinase domain of titin is the first known non-arginine–aspartate kinase to be activated by phosphorylation. The phosphorylated tyrosine is not located in the activation segment, as in other kinases, but in the P+ 1 loop, indicating that this tyrosine is a binding partner of the titinkinase substrate. Titin kinase phosphorylates the muscle protein telethonin in early differentiating myocytes, indicating that this kinase may act in myofibrillogenesis.</description><subject>Amino Acid Sequence</subject><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Catalytic Domain</subject><subject>Cell Differentiation</subject><subject>Cell differentiation, maturation, development, hematopoiesis</subject><subject>Cell Line</subject><subject>Cell physiology</subject><subject>Connectin</subject><subject>Crystallography</subject><subject>Crystallography, X-Ray</subject><subject>Enzyme Activation</subject><subject>Fundamental and applied biological sciences. 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We describe a dual mechanism of activation of titin kinase that consists of phosphorylation of this tyrosine and binding of calcium/calmodulin to the regulatory tail. The serine kinase domain of titin is the first known non-arginine–aspartate kinase to be activated by phosphorylation. The phosphorylated tyrosine is not located in the activation segment, as in other kinases, but in the P+ 1 loop, indicating that this tyrosine is a binding partner of the titinkinase substrate. Titin kinase phosphorylates the muscle protein telethonin in early differentiating myocytes, indicating that this kinase may act in myofibrillogenesis.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>9804419</pmid><doi>10.1038/27603</doi><tpages>7</tpages></addata></record> |
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| subjects | Amino Acid Sequence Animals Biological and medical sciences Catalytic Domain Cell Differentiation Cell differentiation, maturation, development, hematopoiesis Cell Line Cell physiology Connectin Crystallography Crystallography, X-Ray Enzyme Activation Fundamental and applied biological sciences. Psychology Humanities and Social Sciences Humans Models, Molecular Molecular and cellular biology Molecular Sequence Data multidisciplinary Muscle Proteins - antagonists & inhibitors Muscle Proteins - chemistry Muscle Proteins - metabolism Muscle, Skeletal - cytology Muscle, Skeletal - enzymology Muscular system Myofibrils - enzymology Phosphorylation Protein Conformation Protein Kinase Inhibitors Protein Kinases - chemistry Protein Kinases - metabolism Proteins Recombinant Proteins - chemistry Science Science (multidisciplinary) Sequence Homology, Amino Acid Substrate Specificity Tyrosine - metabolism |
| title | Structural basis for activation of the titin kinase domain during myofibrillogenesis |
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