TY - JOUR
T1 - Direction of active sliding of microtubules in Tetrahymena cilia
AU - Sale, W. S.
AU - Satir, P.
PY - 1977
Y1 - 1977
N2 - Axonemes of protozoan (Tetrahymena thermophila BIII) cilia, isolated by the dibucaine method, were treated briefly with trypsin after removal of the ciliary membranes by treatment with Triton X-100. After attachment to polylysine-coated surfaces, the partially digested axonemes remained mainly intact cylinders. Such attached axonemes can be treated with ATP, which induces microtubule sliding. ATP-treated preparations showed disrupted axonemes in which doublets had telescoped out of the original cylinders. These could be captured in place for electron microscopy after critical point drying. Images of this type were used to determine relative movement between adjacent doublet microtubules. Each doublet activity slid relative to its neighbors in a single direction, in which the polarity of force generation of the dynein arms was from base to tip.
AB - Axonemes of protozoan (Tetrahymena thermophila BIII) cilia, isolated by the dibucaine method, were treated briefly with trypsin after removal of the ciliary membranes by treatment with Triton X-100. After attachment to polylysine-coated surfaces, the partially digested axonemes remained mainly intact cylinders. Such attached axonemes can be treated with ATP, which induces microtubule sliding. ATP-treated preparations showed disrupted axonemes in which doublets had telescoped out of the original cylinders. These could be captured in place for electron microscopy after critical point drying. Images of this type were used to determine relative movement between adjacent doublet microtubules. Each doublet activity slid relative to its neighbors in a single direction, in which the polarity of force generation of the dynein arms was from base to tip.
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U2 - 10.1073/pnas.74.5.2045
DO - 10.1073/pnas.74.5.2045
M3 - Article
C2 - 266725
AN - SCOPUS:0344390094
SN - 0027-8424
VL - 74
SP - 2045
EP - 2049
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 5
ER -