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- W4307125477 abstract "The vasoactive intestinal peptide receptor 2 (VIPR2) has attracted attention as a drug target for the treatment of mental disorders, cancer, and immune diseases. In 2021, we identified the peptide KS-133 as a VIPR2-selective antagonist. In this study, we aimed to elucidate the binding mechanism between VIPR2 and KS-133. To this end, VIPR2/KS-133 and VIPR2/vasoactive intestinal peptide (VIP) complex models were constructed through AlphaFold version 2.0 and molecular dynamic simulations. Our models revealed that: (i) both KS-133 and VIP have helical structures, (ii) the interaction residues on VIPR2 for both peptides are similar, and (iii) the orientation of their helices upon their binding to VIPR2 are different by ∼45°. Interestingly, in the process of constructing the aforementioned models, an S-S bond formation between Cys25 and Cys192 of the human VIPR2 was identified. Although these two Cys residues are highly conserved among species (i.e., corresponding to Cys24 and Cys191 in the mouse), no previous reports regarding this S-S bond formation exist. In order to clarify the potential role of this S-S bond in the VIPR2 has functional consequences, a cell line expressing the mouse VIPR2(Cys24Ala, Cys191Ala) was generated. During the VIP stimulation of this cell line, the phosphorylation of AKT (a downstream signal marker of VIPR2) was found to be significantly attenuated, thereby suggesting that the S-S bond has a functional significance for VIPR2. Our study not only elucidates the VIPR2-binding mechanism of KS-133 for the first time, but also provides new insights into the structural biology of VIPR2." @default.
- W4307125477 created "2022-10-27" @default.
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- W4307125477 date "2022-12-01" @default.
- W4307125477 modified "2023-10-09" @default.
- W4307125477 title "AlphaFold version 2.0 elucidates the binding mechanism between VIPR2 and KS-133, and reveals an S–S bond (Cys25−Cys192) formation of functional significance for VIPR2" @default.
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- W4307125477 doi "https://doi.org/10.1016/j.bbrc.2022.10.071" @default.
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