Molecular basis of tubulin transport within the cilium by IFT74 and IFT81.
Molecular basis of tubulin transport within the cilium by IFT74 and IFT81.
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DOI:
10.1126/science.1240985
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发表时间:
2013-08-30
期刊:
影响因子:
--
通讯作者:
Lorentzen E
中科院分区:
文献类型:
--
作者:
Bhogaraju S;Cajanek L;Fort C;Blisnick T;Weber K;Taschner M;Mizuno N;Lamla S;Bastin P;Nigg EA;Lorentzen E
Intraflagellar transport (IFT) of ciliary precursors such as tubulin from the cytoplasm to the ciliary tip is involved in the construction of the cilium, a hairlike organelle found on most eukaryotic cells. However, the molecular mechanisms of IFT are poorly understood. Here, we found that the two core IFT proteins IFT74 and IFT81 form a tubulin-binding module and mapped the interaction to a calponin homology domain of IFT81 and a highly basic domain in IFT74. Knockdown of IFT81 and rescue experiments with point mutants showed that tubulin binding by IFT81 was required for ciliogenesis in human cells.
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