Document Detail

The effect of low ATP concentrations on relaxation in the myosin regulated myofibrils from scallop.
MedLine Citation:
PMID:  2940259     Owner:  NLM     Status:  MEDLINE    
Troponin-tropomyosin-regulated myofibrils show a significant increase in ATPase activity and contract in the absence of calcium when the ATP concentration falls significantly below the saturation level. By contrast, the ATPase of the myosin-regulated myofibrils of scallop striated muscle was not activated in the absence of calcium when the ATP concentration was lowered to 10mM. Nevertheless, a very small fraction of crossbridges were active at 10mM ATP resulting in very slow myofibrillar shortening. In contrast to the behaviour of rabbit contractile proteins there was no correlation between myofibrillar shortening and ATP induced turbidity changes of actomyosin taken from scallop.
M K Knox; A G Szent-Györgyi; C E Trueblood; A Weber; S Zigmond
Related Documents :
10779799 - Kinetics and mechanism of atp-dependent il-1 beta release from microglial cells.
2206909 - Nmr studies of phosphate metabolism in the isolated perfused kidney of developing rats.
2260709 - Intracellular calcium and high-energy phosphates in isolated cardiac myocytes.
19011989 - Nicorandil protects atp-sensitive potassium channels against oxidation-induced dysfunct...
7910429 - Neuromodulation of calcium current by extracellular atp in isolated ventricular myocytes.
2825809 - Distinction between the intermediates in na+-atpase and na+,k+-atpase reactions. ii. ex...
16168699 - Ultrasound liberates nitric oxide (no) from the caged no compound n,n'-bis(carboxymethy...
9249989 - Inhibition of the stomatal blue light response by verapamil at high concentration.
9559899 - Effect of the triaminopyridine flupirtine on calcium uptake, membrane potential and atp...
Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of muscle research and cell motility     Volume:  7     ISSN:  0142-4319     ISO Abbreviation:  J. Muscle Res. Cell. Motil.     Publication Date:  1986 Apr 
Date Detail:
Created Date:  1986-06-30     Completed Date:  1986-06-30     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  8006298     Medline TA:  J Muscle Res Cell Motil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  110-4     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Actomyosin / analysis
Adenosine Triphosphatases / analysis
Adenosine Triphosphate / physiology*
Calcium / physiology
Muscle Contraction*
Muscle Relaxation*
Myofibrils / drug effects,  physiology*
Myosins / physiology*
Grant Support
Reg. No./Substance:
56-65-5/Adenosine Triphosphate; 7440-70-2/Calcium; 9013-26-7/Actomyosin; EC 3.6.1.-/Adenosine Triphosphatases; EC

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Effects of systemic in vivo interleukin-2 (IL-2) reconstitution in patients with acquired immune def...
Next Document:  The effect of length range on heat rate and power during shortening near in situ length in frog musc...