Skip to main content
Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1979 Aug;76(8):3857–3859. doi: 10.1073/pnas.76.8.3857

On the molecular basis for chemomechanical energy transduction in muscle.

M F Morales, J Botts
PMCID: PMC383934  PMID: 291046

Abstract

Herein it is developed that energy transduction in muscle is an activity of myosin S-1 and its ligands, actin (A) and nucleotide (N). S-1 shares with other molecular particles (e.g., hemoglobin) the property that binding events at one of its sites, the N-site, influences binding events at a remote site, the A site (specifically, influences both the actin affinity and actin attachment angle at the A site). However, there is a crucial difference between S-1 and the better-known systems. Because the N site is enzymatic, it has a temporal sequence of occupants; this imposes a temporal sequence of actin attitudes--i.e., a sequence of mechanical events.

Full text

PDF
3857

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. BARANY M., BARANY K. Studies on "active centers" of L-myosin. Biochim Biophys Acta. 1959 Oct;35:293–309. doi: 10.1016/0006-3002(59)90378-6. [DOI] [PubMed] [Google Scholar]
  2. Borejdo J., Morales M. F. Fluctuations in tension during contraction of single muscle fibers. Biophys J. 1977 Dec;20(3):315–334. doi: 10.1016/S0006-3495(77)85552-5. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Highsmith S. Interactions of the actin and nucleotide binding sites on myosin subfragment 1. J Biol Chem. 1976 Oct 25;251(20):6170–6172. [PubMed] [Google Scholar]
  4. Highsmith S., Kretzschmar K. M., O'Konski C. T., Morales M. F. Flexibility of myosin rod, light meromyosin, and myosin subfragment-2 in solution. Proc Natl Acad Sci U S A. 1977 Nov;74(11):4986–4990. doi: 10.1073/pnas.74.11.4986. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Huxley A. F., Simmons R. M. Proposed mechanism of force generation in striated muscle. Nature. 1971 Oct 22;233(5321):533–538. doi: 10.1038/233533a0. [DOI] [PubMed] [Google Scholar]
  6. Kiely B., Martonosi A. The binding of ADP to myosin. Biochim Biophys Acta. 1969 Jan 14;172(1):158–170. doi: 10.1016/0005-2728(69)90101-7. [DOI] [PubMed] [Google Scholar]
  7. Marston S. B., Tregear R. T., Rodger C. D., Clarke M. L. Coupling between the enzymatic site of myosin and the mechanical output of muscle. J Mol Biol. 1979 Feb 25;128(2):111–126. doi: 10.1016/0022-2836(79)90121-9. [DOI] [PubMed] [Google Scholar]
  8. Martonosi A. The binding of Mn2+ and ADP to myosin. J Supramol Struct. 1975;3(4):323–332. doi: 10.1002/jss.400030403. [DOI] [PubMed] [Google Scholar]
  9. Nihel T., Mendelson R. A., Botts J. The site of force generation in muscle contraction as deduced from fluorescence polarization studies. Proc Natl Acad Sci U S A. 1974 Feb;71(2):274–277. doi: 10.1073/pnas.71.2.274. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Taylor E. W. Chemistry of muscle contraction. Annu Rev Biochem. 1972;41(10):577–616. doi: 10.1146/annurev.bi.41.070172.003045. [DOI] [PubMed] [Google Scholar]
  11. Trentham D. R., Eccleston J. F., Bagshaw C. R. Kinetic analysis of ATPase mechanisms. Q Rev Biophys. 1976 May;9(2):217–281. doi: 10.1017/s0033583500002419. [DOI] [PubMed] [Google Scholar]

Articles from Proceedings of the National Academy of Sciences of the United States of America are provided here courtesy of National Academy of Sciences

RESOURCES