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Nabiev SR, Kochurova AM, Nikitina LV, Beldiia EA, Matyushenko AM, Yampolskaya DS, Bershitsky SY, Kopylova GV, Shchepkin DV. N-Terminal Fragment of Cardiac Myosin Binding Protein-C Increases the Duration of Actin-Myosin Interaction. Bull Exp Biol Med 2024; 176:324-327. [PMID: 38336971 DOI: 10.1007/s10517-024-06017-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Indexed: 02/12/2024]
Abstract
Cardiac myosin binding protein-C (cMyBP-C) located in the C-zone of myocyte sarcomere is involved in the regulation of myocardial contraction. Its N-terminal domains C0, C1, C2, and the m-motif between C1 and C2 can bind to the myosin head and actin of the thin filament and affect the characteristics of their interaction. Measurements using an optical trap showed that the C0-C2 fragment of cMyBP-C increases the interaction time of cardiac myosin with the actin filament, while in an in vitro motility assay, it dose-dependently reduces the sliding velocity of actin filaments. Thus, it was found that the N-terminal part of cMyBP-C affects the kinetics of the myosin cross-bridge.
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Affiliation(s)
- S R Nabiev
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia.
| | - A M Kochurova
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - L V Nikitina
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - E A Beldiia
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - A M Matyushenko
- A. N. Bakh Institute of Biochemistry, Federal Research Center Fundamentals of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - D S Yampolskaya
- A. N. Bakh Institute of Biochemistry, Federal Research Center Fundamentals of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - S Yu Bershitsky
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - G V Kopylova
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - D V Shchepkin
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
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2
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Yampolskaya DS, Kopylova GV, Shchepkin DV, Nabiev SR, Nikitina LV, Walklate J, Ziganshin RH, Bershitsky SY, Geeves MA, Matyushenko AM, Levitsky DI. Pseudo-phosphorylation of essential light chains affects the functioning of skeletal muscle myosin. Biophys Chem 2023; 292:106936. [PMID: 36436358 DOI: 10.1016/j.bpc.2022.106936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 11/10/2022] [Accepted: 11/18/2022] [Indexed: 11/21/2022]
Abstract
The work aimed to investigate how the phosphorylation of the myosin essential light chain of fast skeletal myosin (LC1) affects the functional properties of the myosin molecule. Using mass-spectrometry, we revealed phosphorylated peptides of LC1 in myosin from different fast skeletal muscles. Mutations S193D and T65D that mimic natural phosphorylation of LC1 were produced, and their effects on functional properties of the entire myosin molecule and isolated myosin head (S1) were studied. We have shown that T65D mutation drastically decreased the sliding velocity of thin filaments in an in vitro motility assay and strongly increased the duration of actin-myosin interaction in optical trap experiments. These effects of T65D mutation in LC1 observed only with the whole myosin but not with S1 were prevented by double T65D/S193D mutation. The T65D and T65D/S193D mutations increased actin-activated ATPase activity of S1 and decreased ADP affinity for the actin-S1 complex. The results indicate that pseudo-phosphorylation of LC1 differently affects the properties of the whole myosin molecule and its isolated head. Also, the results show that phosphorylation of LC1 of skeletal myosin could be one more mechanism of regulation of actin-myosin interaction that needs further investigation.
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Affiliation(s)
- Daria S Yampolskaya
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prosp. 33, Moscow 119071, Russia
| | - Galina V Kopylova
- Institute of Immunology and Physiology of the Russian Academy of Sciences, Yekaterinburg 620049, Russia
| | - Daniil V Shchepkin
- Institute of Immunology and Physiology of the Russian Academy of Sciences, Yekaterinburg 620049, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Russian Academy of Sciences, Yekaterinburg 620049, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Russian Academy of Sciences, Yekaterinburg 620049, Russia
| | - Jonathan Walklate
- School of Biosciences, University of Kent, Canterbury CT2 7NJ, United Kingdom
| | - Rustam H Ziganshin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Sergey Y Bershitsky
- Institute of Immunology and Physiology of the Russian Academy of Sciences, Yekaterinburg 620049, Russia
| | - Michael A Geeves
- School of Biosciences, University of Kent, Canterbury CT2 7NJ, United Kingdom
| | - Alexander M Matyushenko
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prosp. 33, Moscow 119071, Russia
| | - Dmitrii I Levitsky
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prosp. 33, Moscow 119071, Russia.
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Gerzen OP, Nabiev SR, Klinova SV, Minigalieva IA, Sutunkova MP, Katsnelson BA, Nikitina LV. Molecular mechanisms of mechanical function changes of the rat myocardium under subchronic lead exposure. Food Chem Toxicol 2022; 169:113444. [PMID: 36179994 DOI: 10.1016/j.fct.2022.113444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/10/2022] [Accepted: 09/21/2022] [Indexed: 11/26/2022]
Abstract
A moderate degree of lead intoxication was observed in male rats after repeated intraperitoneal injections with two doses of lead acetate three times a week during 5 (12.5 mg of Pb per kg body mass) and 6 (6.01 mg of Pb per kg body mass) weeks. Using an in vitro motility assay, we investigated the impact of this intoxication on the characteristics of actin-myosin interaction and its regulation in the atria, right, and left ventricles. Both lead doses exposure decreased the maximum sliding velocity of reconstituted thin filaments over myosin and fraction of motile filaments in all heart chambers, caused the myosin isoforms shift towards slower β-myosin heavy chains in ventricles and decreased regulatory light chain phosphorylation in atria. No statistically significant difference was found in force and calcium regulation of actin-myosin interaction. A dose-dependent effect of lead on myosin functional characteristics was found in all heart chambers, but the degree of this effect varied depending on the heart chamber.
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Affiliation(s)
- Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia.
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Svetlana V Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Ilzira A Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Marina P Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Boris A Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
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Klinova SV, Minigalieva IA, Protsenko YL, Sutunkova MP, Gurvich VB, Ryabova JV, Valamina IE, Gerzen OP, Nabiev SR, Balakin AA, Lookin ON, Lisin RV, Kuznetsov DA, Privalova LI, Panov VG, Katsnelson LB, Nikitina LV, Katsnelson BA. Changes in the Cardiotoxic Effects of Lead Intoxication in Rats Induced by Muscular Exercise. Int J Mol Sci 2022; 23:ijms23084417. [PMID: 35457235 PMCID: PMC9029617 DOI: 10.3390/ijms23084417] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 11/17/2022] Open
Abstract
Exposure to lead is associated with an increased risk of cardiovascular diseases. Outbred white male rats were injected with lead acetate intraperitoneally three times a week and/or were forced to run at a speed of 25 m/min for 10 min 5 days a week. We performed noninvasive recording of arterial pressure, electrocardiogram and breathing parameters, and assessed some biochemical characteristics. Electrophoresis in polyacrylamide gel was used to determine the ratio of myosin heavy chains. An in vitro motility assay was employed to measure the sliding velocity of regulated thin filaments on myosin. Isolated multicellular preparations of the right ventricle myocardium were used to study contractility in isometric and physiological modes of contraction. Exercise under lead intoxication normalized the level of calcium and activity of the angiotensin-converting enzyme in the blood serum, normalized the isoelectric line voltage and T-wave amplitude on the electrocardiogram, increased the level of creatine kinase-MB and reduced the inspiratory rate. Additionally, the maximum sliding velocity and the myosin heavy chain ratio were partly normalized. The effect of exercise under lead intoxication on myocardial contractility was found to be variable. In toto, muscular loading was found to attenuate the effects of lead intoxication, as judged by the indicators of the cardiovascular system.
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Affiliation(s)
- Svetlana V. Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Ilzira A. Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Yuri L. Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Marina P. Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Vladimir B. Gurvich
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Julia V. Ryabova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Irene E. Valamina
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Oksana P. Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Salavat R. Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Alexander A. Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Oleg N. Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Ruslan V. Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Daniil A. Kuznetsov
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Larisa I. Privalova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
| | - Vladimir G. Panov
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
- Institute of Industrial Ecology, The Urals Branch of the Russian Academy of Sciences, 620049 Ekaterinburg, Russia
| | - Leonid B. Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Larisa V. Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (Y.L.P.); (O.P.G.); (S.R.N.); (A.A.B.); (O.N.L.); (R.V.L.); (D.A.K.); (L.B.K.); (L.V.N.)
| | - Boris A. Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (M.P.S.); (V.B.G.); (J.V.R.); (I.E.V.); (L.I.P.); (V.G.P.)
- Correspondence: ; Tel.: +7-343-253-04-21 or +7-922-126-30-90; Fax: +7-343-3717-740
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5
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Marchenko MA, Nefedova VV, Yampolskaya DS, Borzova VA, Kleymenov SY, Nabiev SR, Nikitina LV, Matyushenko AM, Levitsky DI. Comparative structural and functional studies of low molecular weight tropomyosin isoforms, the TPM3 gene products. Arch Biochem Biophys 2021; 710:108999. [PMID: 34339666 DOI: 10.1016/j.abb.2021.108999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/06/2021] [Accepted: 07/20/2021] [Indexed: 10/20/2022]
Abstract
Tropomyosin (Tpm) is an actin-associated protein and key regulator of actin filament structure and dynamics in muscle and non-muscle cells where it participates in many vital processes. Human non-muscle cells produce many Tpm isoforms; however, little is known yet about their structural and functional properties. In the present work, we have applied various methods to investigate the properties of five low molecular weight Tpm isoforms (Tpm3.1, Tpm3.2, Tpm3.4, Tpm3.5, and Tpm3.7), the products of TPM3 gene, which significantly differ by alternatively spliced internal exon 6 (6a or 6b) and C-terminal exon 9 (9a, 9c or 9d). Our results clearly demonstrate that the properties of these Tpm isoforms are quite different depending on sequence variations in alternatively spliced regions of their molecules. These differences can be important in further studies to explain why these Tpm isoforms play a key role in organization and dynamics of the cytoskeleton.
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Affiliation(s)
- Marina A Marchenko
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia; Department of Biochemistry, School of Biology, Moscow State University, Moscow, 119234, Russia
| | - Victoria V Nefedova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia
| | - Daria S Yampolskaya
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia
| | - Vera A Borzova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia
| | - Sergey Y Kleymenov
- Koltzov Institute of Developmental Biology of the Russian Academy of Sciences, 119334, Moscow, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Alexander M Matyushenko
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia
| | - Dmitrii I Levitsky
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, 119071, Moscow, Russia.
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6
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Klinova SV, Katsnelson BA, Minigalieva IA, Gerzen OP, Balakin AA, Lisin RV, Butova KA, Nabiev SR, Lookin ON, Katsnelson LB, Privalova LI, Kuznetsov DA, Shur VY, Shishkina EV, Makeev OH, Valamina IE, Panov VG, Sutunkova MP, Nikitina LV, Protsenko YL. Cardioinotropic Effects in Subchronic Intoxication of Rats with Lead and/or Cadmium Oxide Nanoparticles. Int J Mol Sci 2021; 22:ijms22073466. [PMID: 33801669 PMCID: PMC8036427 DOI: 10.3390/ijms22073466] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 01/31/2023] Open
Abstract
Subchronic intoxication was induced in outbred male rats by repeated intraperitoneal injections with lead oxide (PbO) and/or cadmium oxide (CdO) nanoparticles (NPs) 3 times a week during 6 weeks for the purpose of examining its effects on the contractile characteristics of isolated right ventricle trabeculae and papillary muscles in isometric and afterload contractions. Isolated and combined intoxication with these NPs was observed to reduce the mechanical work produced by both types of myocardial preparation. Using the in vitro motility assay, we showed that the sliding velocity of regulated thin filaments drops under both isolated and combined intoxication with CdO–NP and PbO–NP. These results correlate with a shift in the expression of myosin heavy chain (MHC) isoforms towards slowly cycling β–MHC. The type of CdO–NP + PbO–NP combined cardiotoxicity depends on the effect of the toxic impact, the extent of this effect, the ratio of toxicant doses, and the degree of stretching of cardiomyocytes and muscle type studied. Some indices of combined Pb–NP and CdO–NP cardiotoxicity and general toxicity (genotoxicity included) became fully or partly normalized if intoxication developed against background administration of a bioprotective complex.
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Affiliation(s)
- Svetlana V. Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Boris A. Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
- Correspondence: ; Tel.: +7-343-253-04-21; Fax: +7-343-3717-740; Cell: +7-922-126-30-90
| | - Ilzira A. Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Oksana P. Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Alexander A. Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Ruslan V. Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Ksenia A. Butova
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Salavat R. Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Oleg N. Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Leonid B. Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Larisa I. Privalova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Daniil A. Kuznetsov
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Vladimir Ya. Shur
- School of Natural Sciences and Mathematics, The Ural Federal University, 620002 Ekaterinburg, Russia; (V.Y.S.); (E.V.S.)
| | - Ekaterina V. Shishkina
- School of Natural Sciences and Mathematics, The Ural Federal University, 620002 Ekaterinburg, Russia; (V.Y.S.); (E.V.S.)
| | - Oleg H. Makeev
- The Central Research Laboratory, The Ural State Medical University, 620014 Yekaterinburg, Russia; (O.H.M.); (I.E.V.)
| | - Irene E. Valamina
- The Central Research Laboratory, The Ural State Medical University, 620014 Yekaterinburg, Russia; (O.H.M.); (I.E.V.)
| | - Vladimir G. Panov
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
- Institute of Industrial Ecology, The Urals Branch of the Russian Academy of Sciences, 620049 Ekaterinburg, Russia
| | - Marina P. Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, Russia; (S.V.K.); (I.A.M.); (L.I.P.); (V.G.P.); (M.P.S.)
| | - Larisa V. Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
| | - Yuri L. Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, 620049 Yekaterinburg, Russia; (O.P.G.); (A.A.B.); (R.V.L.); (K.A.B.); (S.R.N.); (O.N.L.); (L.B.K.); (D.A.K.); (L.V.N.); (Y.L.P.)
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7
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Shchepkin DV, Nabiev SR, Nikitina LV, Kochurova AM, Berg VY, Bershitsky SY, Kopylova GV. Myosin from the ventricle is more sensitive to omecamtiv mecarbil than myosin from the atrium. Biochem Biophys Res Commun 2020; 528:658-663. [PMID: 32513536 DOI: 10.1016/j.bbrc.2020.05.108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 05/17/2020] [Indexed: 11/25/2022]
Abstract
Omecamtiv mecarbil (OM), an activator of cardiac myosin, strongly affects contractile characteristics of the ventricles and, to a much lesser extent, the characteristics of atrial contraction. We compared the molecular mechanism of action of OM on the interaction of atrial and ventricular myosin with actin using an optical trap and an in vitro motility assay. In concentrations up to 0.5 μM, OM did not affect the step size of a myosin molecule but reduced it at a higher OM level. OM substantially prolonged the interaction of both isoforms of myosin with actin. However, the interaction characteristics of ventricular myosin with actin were more sensitive to OM than those of atrial myosin. Our results, obtained at the level of isolated proteins, can explain why the impact of OM in therapeutic concentrations on the contractile function of the atrium is less significant as compared to those of the ventricle.
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Affiliation(s)
- Daniil V Shchepkin
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Anastasia M Kochurova
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Valentina Y Berg
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Sergey Y Bershitsky
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Galina V Kopylova
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia.
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8
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Katsnelson BA, Klinova SV, Gerzen OP, Balakin AA, Lookin ON, Lisin RV, Nabiev SR, Privalova LI, Minigalieva IA, Panov VG, Katsnelson LB, Nikitina LV, Kuznetsov DA, Protsenko YL. Force-velocity characteristics of isolated myocardium preparations from rats exposed to subchronic intoxication with lead and cadmium acting separately or in combination. Food Chem Toxicol 2020; 144:111641. [PMID: 32758638 DOI: 10.1016/j.fct.2020.111641] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 01/28/2023]
Abstract
This investigation continues our study of the effects of Pb-Cd poisoning on the heart, extending the enquiry from isometric to auxotonic contractions, thereby examining the effect on the ability of myocardial tissues to perform mechanical work. Different shifts were revealed in myocardial force-velocity relations following subchronic exposure of rats to lead acetate and cadmium chloride acting separately, in combination, or in combination with a bioprotective complex (BPC). The experiments were conducted on isolated preparations of trabecules and papillary muscles of the right ventricle in physiological loading conditions and on isolated heart muscle contractile proteins examined by the in vitro motility assay. The results of the latter correlate with the shifts in the ratio of cardiac myosin isoforms. The amount of work performed by the myocardium was calculated on the basis of the tension-shortening loop area and was found to be similar in the preparations from all experimental groups. This fact presumably reflects adaptive capacity of the myocardial function even when contractility is damaged due to the metallic intoxication of a moderate severity. Some characteristics of rat myocardium altered by the impact of lead-cadmium intoxication became fully or partly normalized if intoxication developed against background administration of a bioprotective complex (BPC). Together with previously reported results obtained in the isometric mode of contractility, all these results strengthen the scientific foundations of risk assessment and risk management projects in the occupational and environmental conditions characterized by human exposure to lead and/or cadmium.
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Affiliation(s)
- Boris A Katsnelson
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia.
| | - Svetlana V Klinova
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Ruslan V Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Larisa I Privalova
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Ilzira A Minigalieva
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Vladimir G Panov
- The Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia; The Institute of Industrial Ecology, The Urals Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Daniil A Kuznetsov
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
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9
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Protsenko YL, Klinova SV, Gerzen OP, Privalova LI, Minigalieva IA, Balakin AA, Lookin ON, Lisin RV, Butova KA, Nabiev SR, Katsnelson LB, Nikitina LV, Katsnelson BA. Changes in rat myocardium contractility under subchronic intoxication with lead and cadmium salts administered alone or in combination. Toxicol Rep 2020; 7:433-442. [PMID: 32181144 PMCID: PMC7063142 DOI: 10.1016/j.toxrep.2020.03.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/28/2020] [Accepted: 03/01/2020] [Indexed: 12/13/2022] Open
Abstract
Subchronic intoxications induced in male rats by repeated intraperitoneal injections of lead acetate and cadmium chloride, administered either alone or in combination, are shown to affect the biochemical, cytological and morphometric parameters of blood, liver, heart and kidneys. The single twitch parameters of myocardial trabecular and papillary muscle preparations were measured in the isometric regime to identify changes in the heterometric (length-force) and chronoinotropic (frequency-force) contractility regulation systems. Differences in the responses of these systems in trabecules and papillary muscles to the above intoxications are shown. A number of myocardium mechanical characteristics changing in rats under the effect of a combined lead-cadmium intoxication and increased proportion of α-myosin heavy chains were observed to normalize fully or partially if such intoxication was induced against background administration of a proposed bioprotective complex. Based on the experimental results and literature data, some assumptions are suggested concerning the mechanisms of the cardiotoxic effects produced by lead and cadmium.
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Affiliation(s)
- Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Svetlana V Klinova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Larisa I Privalova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Ilzira A Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia.,Ural Federal University, Yekaterinburg, Russia
| | - Ruslan V Lisin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Ksenya A Butova
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia.,Ural Federal University, Yekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
| | - Boris A Katsnelson
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia
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10
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Protsenko YL, Katsnelson BA, Klinova SV, Lookin ON, Balakin AA, Nikitina LV, Gerzen OP, Nabiev SR, Minigalieva IA, Privalova LI, Gurvich VB, Sutunkova MP, Katsnelson LB. Further analysis of rat myocardium contractility changes associated with a subchronic lead intoxication. Food Chem Toxicol 2019; 125:233-241. [PMID: 30634013 DOI: 10.1016/j.fct.2018.12.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/06/2018] [Accepted: 12/29/2018] [Indexed: 10/27/2022]
Abstract
A moderate subchronic lead intoxication was observed in male rats after repeated intraperitoneal injections of lead acetate. Right ventricular trabeculae and papillary muscles were isolated for in vitro studying of the contraction-relaxation cycle under isotonic and physiological loading. The contractile function of the myocardium was also assessed by measuring the velocity of thin filament movement over myosin. Lead intoxication led in papillary muscles to a decrease in the maximal rate of isotonic shortening for all afterloads and a decrease in the thin filament sliding velocity. Papillary muscles from lead-exposed rats displayed marked changes in most of the main characteristics of afterload contraction-relaxation cycles, but in trabeculae these changes were less pronounced. The reported changes were attenuated to some extent in rats treated with a Ca-containing bioprotector. The amount of work produced by both types of heart muscle preparations was not changed by lead. Only in papillary muscles the load-dependent relaxation index was significantly increased in the lead-treated groups. Thus subchronic lead intoxication affects the peak rate of force development and relaxation properties of cardiac muscle contracting in isotonic/physiological regimes rather than the total amount of mechanical work, which may reflect adaptive changes in the myocardial function under decreased contractility.
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Affiliation(s)
- Yuri L Protsenko
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Boris A Katsnelson
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia.
| | - Svetlana V Klinova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Oleg N Lookin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia; Ural Federal University, Ekaterinburg, Russia
| | - Alexander A Balakin
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Oksana P Gerzen
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
| | - Ilzira A Minigalieva
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Larisa I Privalova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Vladimir B Gurvich
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Marina P Sutunkova
- The Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Ekaterinburg, Russia
| | - Leonid B Katsnelson
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia; Ural Federal University, Ekaterinburg, Russia
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11
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Matyushenko AM, Koubassova NA, Shchepkin DV, Kopylova GV, Nabiev SR, Nikitina LV, Bershitsky SY, Levitsky DI, Tsaturyan AK. The effects of cardiomyopathy-associated mutations in the head-to-tail overlap junction of α-tropomyosin on its properties and interaction with actin. Int J Biol Macromol 2018; 125:1266-1274. [PMID: 30240712 DOI: 10.1016/j.ijbiomac.2018.09.105] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 09/15/2018] [Accepted: 09/17/2018] [Indexed: 10/28/2022]
Abstract
Tropomyosin (Tpm) plays a crucial role in the regulation of muscle contraction by controlling actin-myosin interaction. Tpm coiled-coil molecules bind each other via overlap junctions of their N- and C-termini and form a semi-rigid strand that binds the helical surface of an actin filament. The high bending stiffness of the strand is essential for high cooperativity of muscle regulation. Point mutations M8R and K15N in the N-terminal part of the junction and the A277V one in the C-terminal part are associated with dilated cardiomyopathy, while the M281T and I284V mutations are related to hypertrophic cardiomyopathy. To reveal molecular mechanism(s) underlying these pathologies, we studied the properties of recombinant Tpm carrying these mutations using several experimental approaches and molecular dynamic simulation of the junction. The M8R and K15N mutations weakened the interaction between the N- and C-termini of Tpm in the overlap junction and reduced the Tpm affinity for actin. These changes possibly led to a reduction in the regulation cooperativity. The C-terminal mutations caused only small and controversial changes in properties of Tpm and its complex with actin. Their involvement in disease phenotype is possibly caused by interaction with other sarcomere proteins.
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Affiliation(s)
- Alexander M Matyushenko
- Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, 33 Leninsky prosp., Moscow 119071, Russia; Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia
| | - Natalia A Koubassova
- Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia; Institute of Mechanics, Moscow State University, 1 Mitchurinsky prosp., Moscow 119192, Russia
| | - Daniil V Shchepkin
- Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia
| | - Galina V Kopylova
- Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia
| | - Larisa V Nikitina
- Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia
| | - Sergey Y Bershitsky
- Institute of Immunology and Physiology, Russian Academy of Sciences, 91 Pervomayskaya ul., Yekaterinburg 620049, Russia
| | - Dmitrii I Levitsky
- Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, 33 Leninsky prosp., Moscow 119071, Russia; Belozersky Institute of Physico-Chemical Biology, Moscow State University, 1 Leninskiye Gory bld. 40, Moscow 119234, Russia
| | - Andrey K Tsaturyan
- Institute of Mechanics, Moscow State University, 1 Mitchurinsky prosp., Moscow 119192, Russia.
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12
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Shchepkin DV, Nabiev SR, Kopylova GV, Matyushenko AM, Levitsky DI, Bershitsky SY, Tsaturyan AK. Cooperativity of myosin interaction with thin filaments is enhanced by stabilizing substitutions in tropomyosin. J Muscle Res Cell Motil 2017; 38:183-191. [PMID: 28540577 DOI: 10.1007/s10974-017-9472-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/22/2017] [Indexed: 11/24/2022]
Abstract
Muscle contraction is powered by myosin interaction with actin-based thin filaments containing Ca2+-regulatory proteins, tropomyosin and troponin. Coiled-coil tropomyosin molecules form a long helical strand that winds around actin filament and either shields actin from myosin binding or opens it. Non-canonical residues G126 and D137 in the central part of tropomyosin destabilize its coiled-coil structure. Their substitutions for canonical ones, G126R and D137L, increase structural stability and the velocity of sliding of reconstructed thin filaments along myosin coated surface. The effect of these stabilizing mutations on force of the actin-myosin interaction is unknown. It also remains unclear whether the stabilization affects single actin-myosin interactions or it modifies the cooperativity of the binding of myosin molecules to actin. We used an optical trap to measure the effects of the stabilization on step size, unitary force and duration of the interactions at low and high load and compared the results with those obtained in an in vitro motility assay. We found that significant prolongation of lifetime of the actin-myosin complex under high load observed at high extent of tropomyosin stabilization, i.e. with double mutant, G126R/D137L, correlates with higher force in the motility assay. Also, the higher the extent of stabilization of tropomyosin, the fewer myosin molecules are needed to propel the thin filaments. The data suggest that the effects of the stabilizing mutations in tropomyosin on the myosin interaction with regulated thin filaments are mainly realized via cooperative mechanisms by increasing the size of cooperative unit.
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Affiliation(s)
- Daniil V Shchepkin
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Salavat R Nabiev
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Galina V Kopylova
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Alexander M Matyushenko
- A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia.,Department of Biochemistry, School of Biology, Moscow State University, Moscow, 119234, Russia
| | - Dmitrii I Levitsky
- A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia.,A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119234, Russia
| | - Sergey Y Bershitsky
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
| | - Andrey K Tsaturyan
- Institute of Mechanics, Moscow State University, 1 Mitchurinsky prosp., Moscow, 119192, Russia.
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13
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Nikitina LV, Kopylova GV, Shchepkin DV, Nabiev SR, Bershitsky SY. Investigations of Molecular Mechanisms of Actin-Myosin Interactions in Cardiac Muscle. Biochemistry (Mosc) 2016; 80:1748-63. [PMID: 26878579 DOI: 10.1134/s0006297915130106] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The functional characteristics of cardiac muscle depend on the composition of protein isoforms in the cardiomyocyte contractile machinery. In the ventricular myocardium of mammals, several isoforms of contractile and regulatory proteins are expressed - two isoforms of myosin (V1 and V3) and three isoforms of tropomyosin chains (α, β, and κ). Expression of protein isoforms depends on the animal species, its age and hormonal status, and this can change with pathologies of the myocardium. Mutations in these proteins can lead to cardiomyopathies. The functional significance of the protein isoform composition has been studied mainly on intact hearts or on isolated preparations of myocardium, which could not provide a clear comprehension of the role of each particular isoform. Present-day experimental techniques such as an optical trap and in vitro motility assay make it possible to investigate the phenomena of interactions of contractile and regulatory proteins on the molecular level, thus avoiding effects associated with properties of a whole muscle or muscle tissue. These methods enable free combining of the isoforms to test the molecular mechanisms of their participation in the actin-myosin interaction. Using the optical trap and the in vitro motility assay, we have studied functional characteristics of the cardiac myosin isoforms, molecular mechanisms of the calcium-dependent regulation of actin-myosin interaction, and the role of myosin and tropomyosin isoforms in the cooperativity mechanisms in myocardium. The knowledge of molecular mechanisms underlying myocardial contractility and its regulation is necessary for comprehension of cardiac muscle functioning, its disorders in pathologies, and for development of approaches for their correction.
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Affiliation(s)
- L V Nikitina
- Institute of Immunology and Physiology, Ural Division of the Russian Academy of Sciences, Ekaterinburg, 620041, Russia.
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14
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Nabiev SR, Ovsyannikov DA, Kopylova GV, Shchepkin DV, Matyushenko AM, Koubassova NA, Levitsky DI, Tsaturyan AK, Bershitsky SY. Stabilizing the central part of tropomyosin increases the bending stiffness of the thin filament. Biophys J 2016. [PMID: 26200873 DOI: 10.1016/j.bpj.2015.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
A two-beam optical trap was used to measure the bending stiffness of F-actin and reconstructed thin filaments. A dumbbell was formed by a filament segment attached to two beads that were held in the two optical traps. One trap was static and held a bead used as a force transducer, whereas an acoustooptical deflector moved the beam holding the second bead, causing stretch of the dumbbell. The distance between the beads was measured using image analysis of micrographs. An exact solution to the problem of bending of an elastic filament attached to two beads and subjected to a stretch was used for data analysis. Substitution of noncanonical residues in the central part of tropomyosin with canonical ones, G126R and D137L, and especially their combination, caused an increase in the bending stiffness of the thin filaments. The data confirm that the effect of these mutations on the regulation of actin-myosin interactions may be caused by an increase in tropomyosin stiffness.
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Affiliation(s)
- Salavat R Nabiev
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, Russia
| | - Denis A Ovsyannikov
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, Russia
| | - Galina V Kopylova
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, Russia
| | - Daniil V Shchepkin
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, Russia
| | - Alexander M Matyushenko
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia; Department of Biochemistry, School of Biology, Moscow State University, Moscow, Russia
| | | | - Dmitrii I Levitsky
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia; A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia
| | | | - Sergey Y Bershitsky
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, Russia.
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15
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Nabiev SR, Ovsyannikov DA, Tsaturyan AK, Bershitsky SY. The lifetime of the actomyosin complex in vitro under load corresponding to stretch of contracting muscle. Eur Biophys J 2015; 44:457-63. [PMID: 26043682 DOI: 10.1007/s00249-015-1048-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 05/15/2015] [Accepted: 05/20/2015] [Indexed: 10/23/2022]
Abstract
During eccentric contraction, muscle is lengthening so that the actin-myosin cross-bridges bear a load that exceeds the force they generate during isometric contraction. Using the optical trap technique, we simulated eccentric contraction at the single molecule level and investigated the effect of load on the skeletal actomyosin lifetime at different ATP concentrations. The range of the loads was up to 17 pN above the isometric level. We found that the frequency distribution of the lifetime of the actin-bound state of the myosin molecule was biphasic: it quickly rose and then decreased slowly. The rate of the slow phase of this distribution increased with both the load and the ATP concentration. The fast phase accelerated sharply with the load, but it was independent of ATP concentration. The presence of the fast phase demonstrates that some transition(s) in the actomyosin complex occur before the myosin head becomes able to bind ATP and detach from actin. Its high sensitivity to the load indicates that the transition is load-dependent.
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Affiliation(s)
- Salavat R Nabiev
- Institute of Immunology and Physiology, Russian Academy of Sciences, Yekaterinburg, 620049, Russia
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16
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Tilljashajhov MN, Ishmuhamedov SN, Sharipov I, Abdurahmonov DK, Hozhitoev SV, Valatin KS, Nabiev SR. [Surgical treatment of descending aortic aneurysm with destruction of vertebral bodies]. Khirurgiia (Mosk) 2015:78-81. [PMID: 26978474 DOI: 10.17116/hirurgia20151078-81] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- M N Tilljashajhov
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - S N Ishmuhamedov
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - I Sharipov
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - D K Abdurahmonov
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - S V Hozhitoev
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - K S Valatin
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
| | - S R Nabiev
- Specialized Scientific and Practical Center of Phthisiology and Pulmonology, Health Ministry of the Republic of Uzbekistan, Tashkent, Uzbekistan
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Nabiev SR, Ovsiannikov DA, Bershitskiĭ BI, Bershitskiĭ SI. [Optical trap as a tool for studying motor proteins]. Biofizika 2008; 53:929-935. [PMID: 19137673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The review is concerned with the optical trap method, a modern experimental tool based on the recently discovered ability of light to trap and hold micron and submicron particles in the focused beam. The physical principle of operation of the optical trap and the possibilities of using the tool in studies of the molecular nature of biological motility have been considered. Some studies devoted to the physical characteristics and functioning of single molecules of motor proteins have been analyzed that have been performed with the optical trap method, which allows one to record nanometer displacements and piconewton forces.
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