Correction: Microtubule-associated protein/microtubule affinity-regulating kinase 4 (MARK4) is a negative regulator of the mammalian target of rapamycin complex 1 (mTORC1).

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Figs. 1E and 3C did not indicate the borders between different sections of the same immunoblot. This error has now been corrected and does not affect the results or conclusions of this work.

Figure 1E.

Figure 3C.