ADP Affinity of Myosin VI is Regulated by Off-Axis Load
نویسندگان
چکیده
منابع مشابه
Fission yeast myosin Myo2 is down-regulated in actin affinity by light chain phosphorylation.
Studies in fission yeast Schizosaccharomyces pombe have provided the basis for the most advanced models of the dynamics of the cytokinetic contractile ring. Myo2, a class-II myosin, is the major source of tension in the contractile ring, but how Myo2 is anchored and regulated to produce force is poorly understood. To enable more detailed biochemical/biophysical studies, Myo2 was expressed in th...
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The dimeric motor myosin V transports organelles along actin filament tracks over long distances in cells. Myosin V is a smart 'walker' that is able to swiftly adjust to variable 'road conditions' to continue its processive movement across dense cellular environments. Coordination between the two heads via intramolecular load modulates biochemical kinetics and ensures highly efficient unidirect...
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The recent discovery that the class VI myosin is minus end-directed (Schliwa, 1999; Wells et al., 1999) allows new mechanisms of actin-based motility to exist in cells. This will prompt reexamination of a broad range of cell movements previously difficult to explain by conventional force generating mechanisms. Myosins are a large family of molecular motor proteins divided into 15 or more classe...
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The enzymatic activity of filamentous dephosphorylated smooth muscle myosin has been difficult to determine because the polymer disassembles to the folded conformation in the presence of MgATP. Monoclonal antirod antibodies were used here to "fix" dephosphorylated myosin in the filamentous state. The steady-state actin-activated ATPase of phosphorylated filaments was 30-100-fold higher than tha...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2009
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2008.12.3873