Summary
Mechanical properties of thin (<80 μm) myofibrillar bundles from single rehydrated freeze-dried fibres of the superficial abdominal flexor muscle of the lobster Nephrops norvegicus have been measured, and subsequently the protein content of these fibres has been analysed by SDS-PAGE. Two slow fibre phenotypes can be distinguished on the basis of their myofibrillar assemblages and sarcomere length (type S1: 6.0–7.5 μm, type S2: 8.0–10.9 μm). Differences (means ± sd, average of seven fibres of each type) were observed in the kinetics for Ca2+ activation (half time of force development (ms); S1: 416±174; S2: 762±199 plus a delay of 280±130) and relaxation (half time of force decay (ms); S1: 162±75, S2: 257±53), for Ca2+ sensitivity of force generation (-log [Ca2+] for half maximal activation; S1: 5.40±0.12; S2: 5.55±0.08), and of the kinetics of stretch activation (delay of the peak of stretch-induced force increase (ms); S1: 91±30; S2: 493±436). From these results and partly also in combination with previously obtained mechanical data on intact fibres it can be concluded (1) that S2 fibres are specialized for long-lasting force maintenance whereas S1 fibres are adapted for slow movements; (2) intrinsic myofibrillar kinetics is not the main time-limiting factor for either activation or relaxation of intact fibres under physiological conditions; (3) processes which precede crossbridge cycling seem to be the main time-limiting factors for the Ca2+ activation of the myofibrils.
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Ashley, C. C., Barsotti, R. J., Ferenczi, M. A., Lea, T. J. & Mulligan, I. P. (1987a) Fast activation of skinned muscle fibres from the frog by photolysis of caged calcium. J. Physiol. 394, 24P.
Ashley, C. C., Barsotil, R. J., Ferenczi, M. A., Lea T. J., Mulligan, I. P. & Tsien, R. Y. (1987b) Caged-calcium photolysis activates demembranated muscle fibres from the rabbit. J. Physiol. 390, 144P.
ASHLEY, C. C., LEA, T. J., HOAR, P. E., KERRICK, W. G. L., STRANG, P. F. & POTTER, J. D. (1991) Functional characterisation of the two isoforms of troponin C from the arthropod Balanus nubilis. J. Muscle Res. Cell Motil. 12, 532–42.
BRENNER, B. (1988) Effect of Ca2+ on cross-bridge turnover kinetics in skinned single rabbit psoas fibres: implications for regulation of muscle contraction. Proc. Natl. Acad. Sci. USA 85, 3265–9.
BRENNER, B., SCHOENBERG, M., CHALOVICH, J. M., GREENE, L. E. & EISENBERG, E. (1982) Evidence for cross-bridge attachment in relaxed muscle at low ionic strength. Proc. Natl. Acad. Sci. USA 79, 7288–91.
COLLINS, J. H., THEIBERT, J. L., FRANCOIS, J-M., ASHLEY, C. C. & POTTER, J. D. (1991) Amino acid sequences and Ca2+-binding properties of two isoforms of barnacle Troponin C. Biochemistry 30, 702–7.
Denheen, M.T. (1992) Central and peripheral actions of the neuropeptide proctolin on a postural muscle system in the Norway lobster, Nephrops norvegicus Ph.D thesis. University of Glasgow.
FOWLER, W. S. & NEIL, D. M. (1992) Histochemical heterogeneity of fibres in the abdominal superficial flexor muscles of the Norway lobster, Nephrops norvegicus (L.). J. Exp. Zool. 264, 406–18.
Galler, S. (1989) Ca2+-dependent tension development and kinetic parameters in two crustacean muscle fiber types. Pflügers Arch. 413, R34.
GALLER, S. (1994) Stretch activation of skeletal muscle fibre types. Pflügers Arch. 427, 384–6.
GALLER, S., HUTZLER, C. & HALLER, T. (1990) Effects of taurine on Ca2+-dependent force development of skinned muscle fibre preparations. J. Exp. Biol. 152, 255–64.
GALLER, S. & RATHMAYER, W. (1992) Shortening velocity and force/pCa relationship in skinned crab muscle fibres of different type. Pflügers Arch. 420, 187–93.
GARONE, L., THEIBERT, I. L., MIEGEL, A., MAEDA, Y., MURPHY, C. & Collins, J. H. (1991) Lobster troponin C: amino acid sequences of three isoforms. Arch. Biochem. Biophys. 291, 89–91.
GODT, R. E. & MAUGHAN, D. W. (1977) Swelling of skinned muscle fibres of the frog: Experimental observations. Biophys. J. 19, 103–16.
KAILA, K. & VOIPLO, J. (1990) Dependence of intracellular free calcium and tension on membrane potential and intracellular pH in single cray fish muscle fibres. Pflügers Arch. 416, 501–11.
KENNEDY, D. & TAKEDA, K. (1965) Reflex control of abdominal flexor muscles in the crayfish. II. The tonic system. J. Exp. Biol. 43, 229–46.
KOBAYASHI, T., TAKAGI, T. KONISHI, K. & WNUK, W. (1989) Amino acid sequences of the two major isoforms of Troponin C from crayfish. J. Biol. Chem. 264, 18247–59.
LAEMMLI, U. K. (1970) Cleavage of structural proteins during assembly of the head of bacteriophage T4. Nature 227, 680–5.
LEHMAN, W. & SZENT-GYÖRGYI, A. G. (1975) Regulation of contraction. Distribution of actin control and myosin control in the animal kingdom. J. Gen. Physiol. 66, 1–30.
MIEGEL, A., KOBAYASHI, T. & MAEDA, Y. (1992) Isolation, purification and troponin subunits from lobster tail muscle. J. Muscle Res. Cell Motil. 13, 608–18.
MOISESCU, D. G. (1976) Kinetics of reaction in calciums-activated skinned muscle fibres. Nature 262, 610–13.
MOISESCU, D. G. & THIELECZEK, R. (1978) Calcium and strontium concentration changes within skinned muscle preparations following a change in the external bathing solution. J. Physiol. 275, 241–62.
MÜLLER, A. R., WOLF, H., GALLER, S. & RATHMAYER, W. (1992) Correlation of electrophysiological, histochemical, and mechanical properties in fibres of the coxa rotator muscle of the locust, Locusta migratoria. J. Comp. Physiol. B 162, 5–15.
MYKLES, D. L. (1985) Multiple variants of myofibrillar proteins in single fibers of lobster claw muscles: Evidence for two types of slow fibers in the cutter claw. Biol. Bull. 169, 476–83.
MYKLES, D. L. (1988) Histochemical and biochemical characterisation of two slow fiber types in decapod crustacean muscles. J. Exp. Zool. 245, 232–43.
NIEL, D. M., FOWLER, W. S. & TOBASNICK, G. (1993) Myofibrillar protein composition correlates with histochemistry in fibres of the abdominal felxor muscles of the Norway lobster Nephrops norvegicus. J. Exp. Biol. 183, 185–201.
SILVERMAN, H., COSTELLO, J. & MYKLES, D. L. (1987) Morphological fiber types correlates of physiological and biochemical properties in crustacean muscle. Amer. Zool. 27, 1011–19.
STEIGER, G. J. & ABBOTT, R. H. (1981) Biochemical interpretation of tension transients produced by a four-state mechanical model. J. Muscle Res. Cell Motil. 2, 245–60.
STEPHENSON, D. G. & FORREST, Q. G. (1980) Different isometric force-[Ca2+] relationships in slow and fast twitch skinned muscle fibres of the rat. Biochim. Biophys. Acta 589, 358–62.
STEPHENSON, D. G. & WILLIAMS, D. A. (1980) Activation of skinned arthropod muscle fibres by Ca2+ and Sr2+. J. Muscle Res. Cell Motil. 1, 73–87.
STEPHENSON, D. G. & WILLIAMS, D. A. (1981) Calcium-activated force responses in fast- and slow-twitch skinned muscle fibres of the rat at different temperatures. J. Physiol. 317, 281–302.
WEST, J. M., HUMPHRIS, D. C. & STEPHENSON, D. G. (1992) Differences in maximal activation properties of skinned short-and long-sarcomere muscle fibres from the claw of the freshwater crustacean Cherax destructor. J. Muscle Res. Cell Motil. 13, 668–84.
WEST, J. M. & STEPHENSON, D. G. (1993) Ca2+ and Sr2+ activation properties of skinned muscle fibres with different regulatory systems from crustacea and rat. J. Physiol. 462, 579–96.
WNUK, W. (1989) Resolution of calcium-binding properties o two major isoforms of troponin C from crayfish. J. Biol. Chem. 264, 18240–6.
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Galler, S., Neil, D.M. Calcium-activated and stretch-induced force responses in two biochemically defined muscle fibre types of the Norway lobster. J Muscle Res Cell Motil 15, 390–399 (1994). https://doi.org/10.1007/BF00122113
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DOI: https://doi.org/10.1007/BF00122113