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- W2098201147 abstract "Axons act like cables, electrically wiring the nervous system. Polar bundles of microtubules (MTs) form their backbones and drive their growth. Plus end–tracking proteins (+TIPs) regulate MT growth dynamics and directionality at their plus ends. However, current knowledge about +TIP functions, mostly derived from work in vitro and in nonneuronal cells, may not necessarily apply to the very different context of axonal MTs. For example, the CLIP family of +TIPs are known MT polymerization promoters in nonneuronal cells. However, we show here that neither Drosophila CLIP-190 nor mammalian CLIP-170 is a prominent MT plus end tracker in neurons, which we propose is due to low plus end affinity of the CAP-Gly domain–containing N-terminus and intramolecular inhibition through the C-terminus. Instead, both CLIP-190 and CLIP-170 form F-actin–dependent patches in growth cones, mediated by binding of the coiled-coil domain to myosin-VI. Because our loss-of-function analyses in vivo and in culture failed to reveal axonal roles for CLIP-190, even in double-mutant combinations with four other +TIPs, we propose that CLIP-190 and -170 are not essential axon extension regulators. Our findings demonstrate that +TIP functions known from nonneuronal cells do not necessarily apply to the regulation of the very distinct MT networks in axons." @default.
- W2098201147 created "2016-06-24" @default.
- W2098201147 creator A5034444170 @default.
- W2098201147 creator A5043615577 @default.
- W2098201147 creator A5055199137 @default.
- W2098201147 creator A5069766453 @default.
- W2098201147 creator A5071606159 @default.
- W2098201147 creator A5074904088 @default.
- W2098201147 creator A5084821328 @default.
- W2098201147 date "2015-04-15" @default.
- W2098201147 modified "2023-10-12" @default.
- W2098201147 title "<i>Drosophila</i>CLIP-190 and mammalian CLIP-170 display reduced microtubule plus end association in the nervous system" @default.
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