Publication Date:
1993-07-02
Description:
Muscle contraction consists of a cyclical interaction between myosin and actin driven by the concomitant hydrolysis of adenosine triphosphate (ATP). A model for the rigor complex of F actin and the myosin head was obtained by combining the molecular structures of the individual proteins with the low-resolution electron density maps of the complex derived by cryo-electron microscopy and image analysis. The spatial relation between the ATP binding pocket on myosin and the major contact area on actin suggests a working hypothesis for the crossbridge cycle that is consistent with previous independent structural and biochemical studies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rayment, I -- Holden, H M -- Whittaker, M -- Yohn, C B -- Lorenz, M -- Holmes, K C -- Milligan, R A -- New York, N.Y. -- Science. 1993 Jul 2;261(5117):58-65.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Wisconsin, Madison 53705.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8316858" target="_blank"〉PubMed〈/a〉
Keywords:
Actins/*chemistry/metabolism
;
Actomyosin/*chemistry/metabolism
;
Adenosine Triphosphate/metabolism
;
Binding Sites
;
Image Processing, Computer-Assisted
;
*Models, Molecular
;
*Muscle Contraction
;
Myosin Subfragments/*chemistry/metabolism
;
*Protein Conformation
;
Protein Structure, Secondary
;
X-Ray Diffraction
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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