Cited by 42Microtubule and mitosis dynamicsGenetic and Kidney Cyst DiseasesATP Synthase and ATPases Research

Binding of dynein 21 S ATPase to microtubules. Effects of ionic conditions and substrate analogs.

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Mitchell, D.R., Warner, F.D.·1981·Journal of Biological Chemistry

Abstract

Binding of 21 S dynein ATPase isolated from Tetrahymena cilia to B subfibers of microtubule doublets was used as a model system to study dynein-tubulin interactions and their relationship to the microtubule-based sliding filament mechanism. Binding of 21 S dynein to both A and B microtubule subfibers is supported by monovalent as well as divalent ions. Monovalent cation chlorides support dynein binding to B subfibers with the specificity Li greater than Na congruent to K congruent to Rb congruent to Cs congruent to choline. The corresponding sodium or potassium halides follow the order F greater than Cl greater than Br greater than I. However, an optimal binding concentration of 40 mM KCl supports only 55% of the protein binding which takes place in 3 mM MgSO4 and does not stabilize dynein cross-bridges when whole axonemes are fixed for electron microscopy. Divalent metal ion chlorides (MgCl2, CaCl2, SrCl2, and BaCl2) have nearly equivalent effects at a concentration of 6 mM; all support about 140% of the binding observed in 6 mM MgSO4. The binding data suggest negative cooperativity or the presence of more than one class of dynein binding sites on the microtubule lattice. Low concentrations of MgATP2- induce dissociation of dynein bound to B subfibers in either 6 mM MgSO4 or 40 mM KCl. ADP, Pi, PPi, and AMP-PCH2P are unable to induce dynein dissociation, while AMP-PNHP and ATP4- both cause dynein release from B subfiber sites. The half-maximal sensitivities of the tubulin-dy…

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Crossref · 10.1016/s0021-9258(18)43308-x

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Authors
Mitchell, D. R., & Warner, F. D.
Affiliations
Yale University (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1981-12
Volume
256
Issue
23
Pages
12535-12544
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1533843471
Cited by
42
References
41
FWCI
1.53
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › ATP Synthase and ATPases Research
Keywords
doublet microtubules, ionic environment, divalent cations, monovalent cations, ATP binding, AMP-PNP, sliding filament mechanism, axoneme, N-ethylmaleimide
MeSH terms
Adenosine Triphosphatases, Animals, Cations, Divalent, Cations, Monovalent, Cilia, Dyneins, Kinetics, Microscopy, Electron, Microtubules, Molecular Weight, Protein Binding, Tetrahymena, Tubulin

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