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-Structure paper
タイトル | Bipartite binding and partial inhibition links DEPTOR and mTOR in a mutually antagonistic embrace. |
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ジャーナル・号・ページ | Elife, Vol. 10, Year 2021 |
掲載日 | 2021年9月14日 |
![]() | Maren Heimhalt / Alex Berndt / Jane Wagstaff / Madhanagopal Anandapadamanaban / Olga Perisic / Sarah Maslen / Stephen McLaughlin / Conny Wing-Heng Yu / Glenn R Masson / Andreas Boland / Xiaodan Ni / Keitaro Yamashita / Garib N Murshudov / Mark Skehel / Stefan M Freund / Roger L Williams / ![]() ![]() |
PubMed 要旨 | The mTORC1 kinase complex regulates cell growth, proliferation, and survival. Because mis-regulation of DEPTOR, an endogenous mTORC1 inhibitor, is associated with some cancers, we reconstituted ...The mTORC1 kinase complex regulates cell growth, proliferation, and survival. Because mis-regulation of DEPTOR, an endogenous mTORC1 inhibitor, is associated with some cancers, we reconstituted mTORC1 with DEPTOR to understand its function. We find that DEPTOR is a unique mTORC1 inhibitor that may have evolved to preserve feedback inhibition of PI3K. Counterintuitively, mTORC1 activated by RHEB or oncogenic mutation is much more potently inhibited by DEPTOR. Although DEPTOR partially inhibits mTORC1, mTORC1 prevents this inhibition by phosphorylating DEPTOR, a mutual antagonism that requires no exogenous factors. Structural analyses of the mTORC1/DEPTOR complex showed DEPTOR's PDZ domain interacting with the mTOR FAT region, and the unstructured linker preceding the PDZ binding to the mTOR FRB domain. The linker and PDZ form the minimal inhibitory unit, but the N-terminal tandem DEP domains also significantly contribute to inhibition. |
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手法 | EM (単粒子) |
解像度 | 4.7 Å |
構造データ | EMDB-13097, PDB-7owg: |
由来 |
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![]() | SIGNALING PROTEIN / kinase / PIKK / mTOR / cancer-associated mutation / DEPTOR / partial inhibitor / cancer / PDZ / non-canonical PDZ binding |