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Slow ADP‐dependent acceleration of microtubule translocation produced by an axonemal dynein
Author(s) -
Kikushima Kenji,
Yagi Toshiki,
Kamiya Ritsu
Publication year - 2004
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(04)00278-9
Subject(s) - dynein , microtubule , chlamydomonas , nucleotide , dynactin , biophysics , microbiology and biotechnology , biology , dynein atpase , motility , chemistry , biochemistry , mutant , gene
Dynein has four nucleotide binding sites, of which the functional significance is unknown except for the single catalytic site. To obtain clues to the function of non‐catalytic nucleotide binding, we examined the effect of ADP on the in vitro motility of Chlamydomonas inner‐arm dynein species ‘a’. Upon continuous perfusion with ATP and ADP, microtubules glided on a dynein‐coated glass surface with a velocity that gradually increased over a few minutes. The velocity increased faster at higher ADP concentrations. These results suggest that this dynein is activated by nucleotide binding to regulatory site(s) through an extremely slow process.