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Gunther LK, Rohde JA, Tang W, Walton SD, Unrath WC, Trivedi DV, Muretta JM, Thomas DD, Yengo CM. Converter domain mutations in myosin alter structural kinetics and motor function. J Biol Chem 2018; 294:1554-1567. [PMID: 30518549 DOI: 10.1074/jbc.ra118.006128] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/26/2018] [Indexed: 12/20/2022] Open
Abstract
Myosins are molecular motors that use a conserved ATPase cycle to generate force. We investigated two mutations in the converter domain of myosin V (R712G and F750L) to examine how altering specific structural transitions in the motor ATPase cycle can impair myosin mechanochemistry. The corresponding mutations in the human β-cardiac myosin gene are associated with hypertrophic and dilated cardiomyopathy, respectively. Despite similar steady-state actin-activated ATPase and unloaded in vitro motility-sliding velocities, both R712G and F750L were less able to overcome frictional loads measured in the loaded motility assay. Transient kinetic analysis and stopped-flow FRET demonstrated that the R712G mutation slowed the maximum ATP hydrolysis and recovery-stroke rate constants, whereas the F750L mutation enhanced these steps. In both mutants, the fast and slow power-stroke as well as actin-activated phosphate release rate constants were not significantly different from WT. Time-resolved FRET experiments revealed that R712G and F750L populate the pre- and post-power-stroke states with similar FRET distance and distance distribution profiles. The R712G mutant increased the mole fraction in the post-power-stroke conformation in the strong actin-binding states, whereas the F750L decreased this population in the actomyosin ADP state. We conclude that mutations in key allosteric pathways can shift the equilibrium and/or alter the activation energy associated with key structural transitions without altering the overall conformation of the pre- and post-power-stroke states. Thus, therapies designed to alter the transition between structural states may be able to rescue the impaired motor function induced by disease mutations.
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Affiliation(s)
- Laura K Gunther
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033
| | - John A Rohde
- Department of Biochemistry, Biophysics and Molecular Biology, University of Minnesota, Minneapolis, Minnesota 55455
| | - Wanjian Tang
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033
| | - Shane D Walton
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033
| | - William C Unrath
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033
| | - Darshan V Trivedi
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033
| | - Joseph M Muretta
- Department of Biochemistry, Biophysics and Molecular Biology, University of Minnesota, Minneapolis, Minnesota 55455
| | - David D Thomas
- Department of Biochemistry, Biophysics and Molecular Biology, University of Minnesota, Minneapolis, Minnesota 55455
| | - Christopher M Yengo
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033.
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Omabegho T, Gurel PS, Cheng CY, Kim LY, Ruijgrok PV, Das R, Alushin GM, Bryant Z. Controllable molecular motors engineered from myosin and RNA. NATURE NANOTECHNOLOGY 2018; 13:34-40. [PMID: 29109539 PMCID: PMC5762270 DOI: 10.1038/s41565-017-0005-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 09/19/2017] [Indexed: 05/12/2023]
Abstract
Engineering biomolecular motors can provide direct tests of structure-function relationships and customized components for controlling molecular transport in artificial systems 1 or in living cells 2 . Previously, synthetic nucleic acid motors 3-5 and modified natural protein motors 6-10 have been developed in separate complementary strategies to achieve tunable and controllable motor function. Integrating protein and nucleic-acid components to form engineered nucleoprotein motors may enable additional sophisticated functionalities. However, this potential has only begun to be explored in pioneering work harnessing DNA scaffolds to dictate the spacing, number and composition of tethered protein motors 11-15 . Here, we describe myosin motors that incorporate RNA lever arms, forming hybrid assemblies in which conformational changes in the protein motor domain are amplified and redirected by nucleic acid structures. The RNA lever arm geometry determines the speed and direction of motor transport and can be dynamically controlled using programmed transitions in the lever arm structure 7,9 . We have characterized the hybrid motors using in vitro motility assays, single-molecule tracking, cryo-electron microscopy and structural probing 16 . Our designs include nucleoprotein motors that reversibly change direction in response to oligonucleotides that drive strand-displacement 17 reactions. In multimeric assemblies, the controllable motors walk processively along actin filaments at speeds of 10-20 nm s-1. Finally, to illustrate the potential for multiplexed addressable control, we demonstrate sequence-specific responses of RNA variants to oligonucleotide signals.
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Affiliation(s)
- Tosan Omabegho
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Pinar S Gurel
- Cell Biology and Physiology Center, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
- Laboratory of Structural Biophysics and Mechanobiology, The Rockefeller University, New York, NY, USA
| | - Clarence Y Cheng
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, USA
| | - Laura Y Kim
- Cell Biology and Physiology Center, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Paul V Ruijgrok
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Rhiju Das
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, USA
| | - Gregory M Alushin
- Cell Biology and Physiology Center, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
- Laboratory of Structural Biophysics and Mechanobiology, The Rockefeller University, New York, NY, USA
| | - Zev Bryant
- Department of Bioengineering, Stanford University, Stanford, CA, USA.
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA.
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3
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Preller M, Manstein D. Myosin Structure, Allostery, and Mechano-Chemistry. Structure 2013; 21:1911-22. [DOI: 10.1016/j.str.2013.09.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 09/19/2013] [Accepted: 09/25/2013] [Indexed: 01/10/2023]
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Abstract
Much of our knowledge of molecular cellular functions is based on studies with a few number of model organisms that were established during the last 50 years. The social amoeba Dictyostelium discoideum is one such model, and has been particularly useful for the study of cell motility, chemotaxis, phagocytosis, endocytic vesicle traffic, cell adhesion, pattern formation, caspase-independent cell death, and, more recently, autophagy and social evolution. As nonmammalian model of human diseases D. discoideum is a newcomer, yet it has proven to be a powerful genetic and cellular model for investigating host-pathogen interactions and microbial infections, for mitochondrial diseases, and for pharmacogenetic studies. The D. discoideum genome harbors several homologs of human genes responsible for a variety of diseases, -including Chediak-Higashi syndrome, lissencephaly, mucolipidosis, Huntington disease, IBMPFD, and Shwachman-Diamond syndrome. A few genes have already been studied, providing new insights on the mechanism of action of the encoded proteins and in some cases on the defect underlying the disease. The opportunities offered by the organism and its place among the nonmammalian models for human diseases will be discussed.
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Affiliation(s)
- Salvatore Bozzaro
- Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy.
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Elting MW, Bryant Z, Liao JC, Spudich JA. Detailed tuning of structure and intramolecular communication are dispensable for processive motion of myosin VI. Biophys J 2011; 100:430-9. [PMID: 21244839 DOI: 10.1016/j.bpj.2010.11.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 10/26/2010] [Accepted: 11/16/2010] [Indexed: 11/28/2022] Open
Abstract
Dimeric myosin VI moves processively hand-over-hand along actin filaments. We have characterized the mechanism of this processive motion by measuring the impact of structural and chemical perturbations on single-molecule processivity. Processivity is maintained despite major alterations in lever arm structure, including replacement of light chain binding regions and elimination of the medial tail. We present kinetic models that can explain the ATP concentration-dependent processivities of myosin VI constructs containing either native or artificial lever arms. We conclude that detailed tuning of structure and intramolecular communication are dispensable for processive motion, and further show theoretically that one proposed type of nucleotide gating can be detrimental rather than beneficial for myosin processivity.
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Spudich JA, Sivaramakrishnan S. Myosin VI: an innovative motor that challenged the swinging lever arm hypothesis. Nat Rev Mol Cell Biol 2010; 11:128-37. [PMID: 20094053 DOI: 10.1038/nrm2833] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The swinging crossbridge hypothesis states that energy from ATP hydrolysis is transduced to mechanical movement of the myosin head while bound to actin. The light chain-binding region of myosin is thought to act as a lever arm that amplifies movements near the catalytic site. This model has been challenged by findings that myosin VI takes larger steps along actin filaments than early interpretations of its structure seem to allow. We now know that myosin VI does indeed operate by an unusual approximately 180 degrees lever arm swing and achieves its large step size using special structural features in its tail domain.
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Affiliation(s)
- James A Spudich
- Department of Biochemistry, B400 Beckman Center, Stanford University School of Medicine, Stanford, California 94305-5307, USA.
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Amrute‐Nayak M, Diensthuber R, Steffen W, Kathmann D, Hartmann F, Fedorov R, Urbanke C, Manstein D, Brenner B, Tsiavaliaris G. Targeted Optimization of a Protein Nanomachine for Operation in Biohybrid Devices. Angew Chem Int Ed Engl 2010; 49:312-6. [DOI: 10.1002/anie.200905200] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mamta Amrute‐Nayak
- Institut für Molekular‐ und Zellphysiologie OE4350, Medizinische Hochschule Hannover (Germany)
| | - Ralph P. Diensthuber
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Walter Steffen
- Institut für Molekular‐ und Zellphysiologie OE4350, Medizinische Hochschule Hannover (Germany)
| | - Daniela Kathmann
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Falk K. Hartmann
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Roman Fedorov
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Claus Urbanke
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Dietmar J. Manstein
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Bernhard Brenner
- Institut für Molekular‐ und Zellphysiologie OE4350, Medizinische Hochschule Hannover (Germany)
| | - Georgios Tsiavaliaris
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
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Amrute‐Nayak M, Diensthuber R, Steffen W, Kathmann D, Hartmann F, Fedorov R, Urbanke C, Manstein D, Brenner B, Tsiavaliaris G. Targeted Optimization of a Protein Nanomachine for Operation in Biohybrid Devices. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200905200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mamta Amrute‐Nayak
- Institut für Molekular‐ und Zellphysiologie OE4350, Medizinische Hochschule Hannover (Germany)
| | - Ralph P. Diensthuber
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Walter Steffen
- Institut für Molekular‐ und Zellphysiologie OE4350, Medizinische Hochschule Hannover (Germany)
| | - Daniela Kathmann
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Falk K. Hartmann
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Roman Fedorov
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Claus Urbanke
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Dietmar J. Manstein
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
| | - Bernhard Brenner
- Institut für Molekular‐ und Zellphysiologie OE4350, Medizinische Hochschule Hannover (Germany)
| | - Georgios Tsiavaliaris
- Institut für Biophysikalische Chemie OE4350, Medizinische Hochschule Hannover, Carl‐Neuberg‐Strasse 1, 30623 Hannover (Germany), Fax: (+49) 511‐532‐5966 http://www.mh‐hannover.de/bpc_uncmyo.html
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Braatz RD, Seebauer EG, Alkire RC. Multiscale Modeling and Design of Electrochemical Systems. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/9783527625307.ch4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bryant Z, Altman D, Spudich JA. The power stroke of myosin VI and the basis of reverse directionality. Proc Natl Acad Sci U S A 2006; 104:772-7. [PMID: 17182734 PMCID: PMC1713167 DOI: 10.1073/pnas.0610144104] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Myosin VI supports movement toward the (-) end of actin filaments, despite sharing extensive sequence and structural homology with (+)-end-directed myosins. A class-specific stretch of amino acids inserted between the converter domain and the lever arm was proposed to provide the structural basis of directionality reversal. Indeed, the unique insert mediates a 120 degrees redirection of the lever arm in a crystal structure of the presumed poststroke conformation of myosin VI [Ménétrey J, Bahloul A, Wells AL, Yengo CM, Morris CA, Sweeney HL, Houdusse A (2005) Nature 435:779-785]. However, this redirection alone is insufficient to account for the large (-)-end-directed stroke of a monomeric myosin VI construct. The underlying motion of the myosin VI converter domain must therefore differ substantially from the power stroke of (+)-end-directed myosins. To experimentally map out the motion of the converter domain and lever arm, we have generated a series of truncated myosin VI constructs and characterized the size and direction of the power stroke for each construct using dual-labeled gliding filament assays and optical trapping. Motors truncated near the end of the converter domain generate (+)-end-directed motion, whereas longer constructs move toward the (-) end. Our results directly demonstrate that the unique insert is required for directionality reversal, ruling out a large class of models in which the converter domain moves toward the (-) end. We suggest that the lever arm rotates approximately 180 degrees between pre- and poststroke conformations.
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Affiliation(s)
- Zev Bryant
- *Department of Biochemistry, Stanford University School of Medicine, and
| | - David Altman
- Department of Physics, Stanford University, Stanford, CA 94305-5307
| | - James A. Spudich
- *Department of Biochemistry, Stanford University School of Medicine, and
- To whom correspondence should be addressed. E-mail:
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Braatz RD, Alkire RC, Seebauer EG, Drews TO, Rusli E, Karulkar M, Xue F, Qin Y, Jung MY, Gunawan R. A multiscale systems approach to microelectronic processes. Comput Chem Eng 2006. [DOI: 10.1016/j.compchemeng.2006.05.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Affiliation(s)
- Gerald Offer
- Department of Physiology, University of Bristol, Medical Sciences Building, University Walk, Bristol BS8 1TD, UK.
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Sweeney HL, Houdusse A. The motor mechanism of myosin V: insights for muscle contraction. Philos Trans R Soc Lond B Biol Sci 2005; 359:1829-41. [PMID: 15647159 PMCID: PMC1693472 DOI: 10.1098/rstb.2004.1576] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It is 50 years since the sliding of actin and myosin filaments was proposed as the basis of force generation and shortening in striated muscle. Although this is now generally accepted, the detailed molecular mechanism of how myosin uses adenosine triphosphate to generate force during its cyclic interaction with actin is only now being unravelled. New insights have come from the unconventional myosins, especially myosin V. Myosin V is kinetically tuned to allow movement on actin filaments as a single molecule, which has led to new kinetic, mechanical and structural data that have filled in missing pieces of the actomyosin-chemo-mechanical transduction puzzle.
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Affiliation(s)
- H Lee Sweeney
- Department of Physiology, University of Pennsylvania School of Medicine, A700 Richards Building, 3700 Hamilton Walk, Philadelphia, PA 19104-6085, USA.
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14
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Abstract
Introduction
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Affiliation(s)
- K C Holmes
- Max-Planck-Institute fur Medizinische Forschung, Jahnstrasse 29, Heidelberg D-61920, Germany
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