The mTOR-regulated phosphoproteome reveals a mechanism of mTORC1-mediated inhibition of growth factor signaling.
The mTOR-regulated phosphoproteome reveals a mechanism of mTORC1-mediated inhibition of growth factor signaling.
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DOI:
10.1126/science.1199498
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发表时间:
2011-06-10
期刊:
影响因子:
--
通讯作者:
Sabatini DM
中科院分区:
文献类型:
--
作者:
Hsu PP;Kang SA;Rameseder J;Zhang Y;Ottina KA;Lim D;Peterson TR;Choi Y;Gray NS;Yaffe MB;Marto JA;Sabatini DM
The mTOR protein kinase is a master growth promoter that nucleates two complexes, mTORC1 and mTORC2. Despite the diverse processes controlled by mTOR, few substrates are known. We defined the mTOR-regulated phosphoproteome by quantitative mass spectrometry and characterized the primary sequence motif specificity of mTOR using positional scanning peptide libraries. We found that the phosphorylation response to insulin is largely mTOR-dependent and that mTOR exhibits a unique preference for proline, hydrophobic, and aromatic residues at the +1 position. The adaptor protein Grb10 was identified as an mTORC1 substrate that mediates the inhibition of PI3K typical of cells lacking TSC2, a tumor suppressor and negative regulator of mTORC1. Our work clarifies how mTORC1 inhibits growth factor signaling and opens new areas of investigation in mTOR biology.
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影响因子:
4.8
作者:
Morrione, A;Plant, P;Baserga, R
通讯作者:
Baserga, R
DOI:
10.1083/jcb.200403069
发表时间:
2004-07-19
期刊:
The Journal of cell biology
影响因子:
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10.1073/pnas.1532175100
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2003-07-08
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