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Landim-Vieira M, Childers MC, Wacker AL, Garcia MR, He H, Singh R, Brundage EA, Johnston JR, Whitson BA, Chase PB, Janssen PML, Regnier M, Biesiadecki BJ, Pinto JR, Parvatiyar MS. Post-translational modification patterns on β-myosin heavy chain are altered in ischemic and nonischemic human hearts. eLife 2022; 11:74919. [PMID: 35502901 PMCID: PMC9122498 DOI: 10.7554/elife.74919] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 05/01/2022] [Indexed: 11/13/2022] Open
Abstract
Phosphorylation and acetylation of sarcomeric proteins are important for fine-tuning myocardial contractility. Here, we used bottom-up proteomics and label-free quantification to identify novel post-translational modifications (PTMs) on β-myosin heavy chain (β-MHC) in normal and failing human heart tissues. We report six acetylated lysines and two phosphorylated residues: K34-Ac, K58-Ac, S210-P, K213-Ac, T215-P, K429-Ac, K951-Ac, and K1195-Ac. K951-Ac was significantly reduced in both ischemic and nonischemic failing hearts compared to nondiseased hearts. Molecular dynamics (MD) simulations show that K951-Ac may impact stability of thick filament tail interactions and ultimately myosin head positioning. K58-Ac altered the solvent-exposed SH3 domain surface - known for protein-protein interactions - but did not appreciably change motor domain conformation or dynamics under conditions studied. Together, K213-Ac/T215-P altered loop 1's structure and dynamics - known to regulate ADP-release, ATPase activity, and sliding velocity. Our study suggests that β-MHC acetylation levels may be influenced more by the PTM location than the type of heart disease since less protected acetylation sites are reduced in both heart failure groups. Additionally, these PTMs have potential to modulate interactions between β-MHC and other regulatory sarcomeric proteins, ADP-release rate of myosin, flexibility of the S2 region, and cardiac myofilament contractility in normal and failing hearts.
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Affiliation(s)
- Maicon Landim-Vieira
- Department of Biomedical Sciences, College of Medicine, The Florida State UniversityTallahasseeUnited States
| | - Matthew C Childers
- Department of Bioengineering, College of Medicine, University of WashingtonSeattleUnited States
| | - Amanda L Wacker
- Department of Nutrition and Integrative Physiology, The Florida State UniversityTallahasseeUnited States
| | - Michelle Rodriquez Garcia
- Department of Biomedical Sciences, College of Medicine, The Florida State UniversityTallahasseeUnited States
| | - Huan He
- Department of Biomedical Sciences, College of Medicine, The Florida State UniversityTallahasseeUnited States,Translational Science Laboratory, College of Medicine, The Florida State UniversityTallahasseeUnited States
| | - Rakesh Singh
- Department of Biomedical Sciences, College of Medicine, The Florida State UniversityTallahasseeUnited States,Translational Science Laboratory, College of Medicine, The Florida State UniversityTallahasseeUnited States
| | - Elizabeth A Brundage
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State UniversityColumbusUnited States
| | - Jamie R Johnston
- Department of Biomedical Sciences, College of Medicine, The Florida State UniversityTallahasseeUnited States
| | - Bryan A Whitson
- Department of Surgery, College of Medicine, The Ohio State UniversityColumbusUnited States
| | - P Bryant Chase
- Department of Biological Science, The Florida State UniversityTallahasseeUnited States
| | - Paul ML Janssen
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State UniversityColumbusUnited States
| | - Michael Regnier
- Department of Bioengineering, College of Medicine, University of WashingtonSeattleUnited States
| | - Brandon J Biesiadecki
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State UniversityColumbusUnited States
| | - J Renato Pinto
- Department of Biomedical Sciences, College of Medicine, The Florida State UniversityTallahasseeUnited States
| | - Michelle S Parvatiyar
- Department of Nutrition and Integrative Physiology, The Florida State UniversityTallahasseeUnited States
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Kollmar M, Hatje K. Shared gene structures and clusters of mutually exclusive spliced exons within the metazoan muscle myosin heavy chain genes. PLoS One 2014; 9:e88111. [PMID: 24498429 PMCID: PMC3912159 DOI: 10.1371/journal.pone.0088111] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 01/07/2014] [Indexed: 11/25/2022] Open
Abstract
Multicellular animals possess two to three different types of muscle tissues. Striated muscles have considerable ultrastructural similarity and contain a core set of proteins including the muscle myosin heavy chain (Mhc) protein. The ATPase activity of this myosin motor protein largely dictates muscle performance at the molecular level. Two different solutions to adjusting myosin properties to different muscle subtypes have been identified so far: Vertebrates and nematodes contain many independent differentially expressed Mhc genes while arthropods have single Mhc genes with clusters of mutually exclusive spliced exons (MXEs). The availability of hundreds of metazoan genomes now allowed us to study whether the ancient bilateria already contained MXEs, how MXE complexity subsequently evolved, and whether additional scenarios to control contractile properties in different muscles could be proposed, By reconstructing the Mhc genes from 116 metazoans we showed that all intron positions within the motor domain coding regions are conserved in all bilateria analysed. The last common ancestor of the bilateria already contained a cluster of MXEs coding for part of the loop-2 actin-binding sequence. Subsequently the protostomes and later the arthropods gained many further clusters while MXEs got completely lost independently in several branches (vertebrates and nematodes) and species (for example the annelid Helobdella robusta and the salmon louse Lepeophtheirus salmonis). Several bilateria have been found to encode multiple Mhc genes that might all or in part contain clusters of MXEs. Notable examples are a cluster of six tandemly arrayed Mhc genes, of which two contain MXEs, in the owl limpet Lottia gigantea and four Mhc genes with three encoding MXEs in the predatory mite Metaseiulus occidentalis. Our analysis showed that similar solutions to provide different myosin isoforms (multiple genes or clusters of MXEs or both) have independently been developed several times within bilaterian evolution.
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Affiliation(s)
- Martin Kollmar
- Group Systems Biology of Motor Proteins, Department of NMR-based Structural Biology, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
- * E-mail:
| | - Klas Hatje
- Group Systems Biology of Motor Proteins, Department of NMR-based Structural Biology, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
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