Zinc Inhibits Hedgehog Autoprocessing
Zinc Inhibits Hedgehog Autoprocessing
复制标题
锌抑制刺猬自动加工
DOI:
--
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发表时间:
2015
影响因子:
4.8
通讯作者:
Chunyu Wang
中科院分区:
文献类型:
--
作者:
Jian Xie;Timothy S. Owen;Ke Xia;Ajay V. Singh;E. Tou;Lingyun Li;Brigitte L. Arduini;Hongmin Li;L. Wan;B. Callahan;Chunyu Wang
Background: In many types of cancers zinc deficiency and overproduction of Hedgehog (Hh) ligand co-exist. Results: Zinc binds to the active site of the Hedgehog-intein (Hint) domain and inhibits Hh ligand production both in vitro and in cell culture. Conclusion: Zinc influences the Hh autoprocessing. Significance: This study uncovers a novel mechanistic link between zinc and the Hh signaling pathway. Zinc is an essential trace element with wide-ranging biological functions, whereas the Hedgehog (Hh) signaling pathway plays crucial roles in both development and disease. Here we show that there is a mechanistic link between zinc and Hh signaling. The upstream activator of Hh signaling, the Hh ligand, originates from Hh autoprocessing, which converts the Hh precursor protein to the Hh ligand. In an in vitro Hh autoprocessing assay we show that zinc inhibits Hh autoprocessing with a Ki of 2 μm. We then demonstrate that zinc inhibits Hh autoprocessing in a cellular environment with experiments in primary rat astrocyte culture. Solution NMR reveals that zinc binds the active site residues of the Hh autoprocessing domain to inhibit autoprocessing, and isothermal titration calorimetry provided the thermodynamics of the binding. In normal physiology, zinc likely acts as a negative regulator of Hh autoprocessing and inhibits the generation of Hh ligand and Hh signaling. In many diseases, zinc deficiency and elevated level of Hh ligand co-exist, including prostate cancer, lung cancer, ovarian cancer, and autism. Our data suggest a causal relationship between zinc deficiency and the overproduction of Hh ligand.
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影响因子:
--
作者:
Zhang L;Zheng Y;Xi Z;Luo Z;Xu X;Wang C;Liu Y
通讯作者:
Liu Y
影响因子:
3.5
作者:
Nanni, L;Ming, JE;Muenke, M
通讯作者:
Muenke, M
影响因子:
14
作者:
Zuidema, Jonathan M.;Hyzinski-Garcia, Maria C.;Van Vlasselaer, Kristien;Zaccor, Nicholas W.;Plopper, George E.;Mongin, Alexander A.;Gilbert, Ryan J.
通讯作者:
Gilbert, Ryan J.
影响因子:
3
作者:
Costello, Leslie C.;Franklin, Renty B.
通讯作者:
Franklin, Renty B.
DOI:
--
发表时间:
2005
期刊:
--
影响因子:
--
作者:
S. S. Karhadkar-S.;P. Beachy
通讯作者:
S. S. Karhadkar-S.;P. Beachy