Structural biology. Structural basis for Notch1 engagement of Delta-like 4.
Structural biology. Structural basis for Notch1 engagement of Delta-like 4.
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DOI:
10.1126/science.1261093
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发表时间:
2015-02-20
期刊:
影响因子:
--
通讯作者:
Garcia KC
中科院分区:
文献类型:
--
作者:
Luca VC;Jude KM;Pierce NW;Nachury MV;Fischer S;Garcia KC
Notch receptors guide mammalian cell fate decisions by engaging the proteins Jagged and Delta-like (DLL). The 2.3 angstrom resolution crystal structure of the interacting regions of the Notch1-DLL4 complex reveals a two-site, antiparallel binding orientation assisted by Notch1 O-linked glycosylation. Notch1 epidermal growth factor–like repeats 11 and 12 interact with the DLL4 Delta/Serrate/Lag-2 (DSL) domain and module at the N-terminus of Notch ligands (MNNL) domains, respectively. Threonine and serine residues on Notch1 are functionalized with O-fucose and O-glucose, which act as surrogate amino acids by making specific, and essential, contacts to residues on DLL4. The elucidation of a direct chemical role for O-glycans in Notch1 ligand engagement demonstrates how, by relying on posttranslational modifications of their ligand binding sites, Notch proteins have linked their functional capacity to developmentally regulated biosynthetic pathways.
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