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Learn MoreMicrotubule actin crosslinking factor 1 (Macf1) plays a role in coordinated actions of actin and microtubules in multiple cellular processes. Here we show that Macf1 is also critical for ciliogenesis in multiple cell types. Ablation of Macf1 in the developing retina abolishes ciliogenesis and basal bodies fail to dock to ciliary vesicles or migrate apically. Photoreceptor polarity is randomized while inner retinal cells laminate correctly, suggesting that photoreceptor maturation is guided by polarity cues provided bycilia. Deletion of Macf1 in adult photoreceptors caused reversal of basal body docking and loss of outer segments, reflecting a continuous requirement for Macf1 function. Macf1 was also shown to interact with ciliary proteins Mkks and Talpid3. We propose that a disruption of trafficking across microtubles to actin filaments underlies the ciliogenesis defect in cells lacking Macf1, and that Mkks and Talpid3 are involved in the coordination of microtubule and actin interactions. SOURCE: Koray Dogan Kaya (koraydogan.kaya@nih.gov) - NNRL NIH
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