Structural insights into substrate and inhibitor binding sites in human indoleamine 2,3-dioxygenase 1.
Structural insights into substrate and inhibitor binding sites in human indoleamine 2,3-dioxygenase 1.
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DOI:
10.1038/s41467-017-01725-8
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发表时间:
2017-11-22
影响因子:
16.6
通讯作者:
Yeh SR
中科院分区:
文献类型:
--
作者:
Lewis-Ballester A;Pham KN;Batabyal D;Karkashon S;Bonanno JB;Poulos TL;Yeh SR
Human indoleamine 2,3-dioxygenase 1 (hIDO1) is an attractive cancer immunotherapeutic target owing to its role in promoting tumoral immune escape. However, drug development has been hindered by limited structural information. Here, we report the crystal structures of hIDO1 in complex with its substrate, Trp, an inhibitor, epacadostat, and/or an effector, indole ethanol (IDE). The data reveal structural features of the active site (Sa) critical for substrate activation; in addition, they disclose a new inhibitor-binding mode and a distinct small molecule binding site (Si). Structure-guided mutation of a critical residue, F270, to glycine perturbs the Si site, allowing structural determination of an inhibitory complex, where both the Sa and Si sites are occupied by Trp. The Si site offers a novel target site for allosteric inhibitors and a molecular explanation for the previously baffling substrate-inhibition behavior of the enzyme. Taken together, the data open exciting new avenues for structure-based drug design. Human indoleamine 2,3-dioxygenase 1 (hIDO1) is an immunotherapeutic target for cancer therapy. Here, the authors present the substrate-, inhibitor- and effector-bound hIDO1 crystal structures, which give insights into the mechanism and reveal a second small molecule binding site, which is of interest for drug design.
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影响因子:
4.8
作者:
Li, D;Stuehr, DJ;Rousseau, DL
通讯作者:
Rousseau, DL
影响因子:
16.8
作者:
Munn DH;Mellor AL
通讯作者:
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作者:
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
Cowtan, K
影响因子:
4.6
作者:
Lewis-Ballester A;Forouhar F;Kim SM;Lew S;Wang Y;Karkashon S;Seetharaman J;Batabyal D;Chiang BY;Hussain M;Correia MA;Yeh SR;Tong L
通讯作者:
Tong L