Drug discovery: Zebrafish uncover novel antipsychotics

June 17th, 2016 by Louis C Leung

Nature Chemical Biology 12, 468 (2016). doi:10.1038/nchembio.2114

Authors: Louis C Leung & Philippe Mourrain

Two independent high-throughput zebrafish behavioral screens of tens of thousands of compounds identify the 'finazines', a novel group of antipsychotics, and their endogenous genetic target, the σ1 receptor.

Ion channels: Calcium channels work together

June 17th, 2016 by Mirella Bucci

Nature Chemical Biology 12, 467 (2016). doi:10.1038/nchembio.2123

Author: Mirella Bucci

Chemical genetics: Unraveling cell death mysteries

June 17th, 2016 by Xiomaris M Cotto-Rios

Nature Chemical Biology 12, 470 (2016). doi:10.1038/nchembio.2110

Authors: Xiomaris M Cotto-Rios & Evripidis Gavathiotis

Non-apoptotic regulated cell death is not fully characterized, particularly for ferroptosis, the iron- and ROS-dependent form of regulated cell death. A systematic approach using modulatory profiling and cell line sensitivity analysis has unraveled the association of lipid metabolism with ferroptosis and enabled the discovery of a novel specific ferroptosis inducer.

Antibiotic discovery: Macrolides en masse

June 17th, 2016 by Caitlin Deane

Nature Chemical Biology 12, 467 (2016). doi:10.1038/nchembio.2120

Author: Caitlin Deane

Transcriptomics-Guided Design of Synthetic Promoters for a Mammalian System

June 16th, 2016 by Joseph K. Cheng and Hal S. Alper

TOC Graphic

ACS Synthetic Biology
DOI: 10.1021/acssynbio.6b00075

Small-molecule binding of the axin RGS domain promotes β-catenin and Ras degradation

June 13th, 2016 by Pu-Hyeon Cha

Nature Chemical Biology 12, 593 (2016). doi:10.1038/nchembio.2103

Authors: Pu-Hyeon Cha, Yong-Hee Cho, Sang-Kyu Lee, JaeHeon Lee, Woo-Jeong Jeong, Byoung-San Moon, Ji-Hye Yun, Jee Sun Yang, Sooho Choi, Juyong Yoon, Hyun-Yi Kim, Mi-Yeon Kim, Saluja Kaduwal, Weontae Lee, Do Sik Min, Hoguen Kim, Gyoonhee Han & Kang-Yell Choi

  • Posted in Nat Chem Biol, Publications
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A conserved phosphatase destroys toxic glycolytic side products in mammals and yeast

June 13th, 2016 by François Collard

Nature Chemical Biology 12, 601 (2016). doi:10.1038/nchembio.2104

Authors: François Collard, Francesca Baldin, Isabelle Gerin, Jennifer Bolsée, Gaëtane Noël, Julie Graff, Maria Veiga-da-Cunha, Vincent Stroobant, Didier Vertommen, Amina Houddane, Mark H Rider, Carole L Linster, Emile Van Schaftingen & Guido T Bommer

  • Posted in Nat Chem Biol, Publications
  • Comments Off on A conserved phosphatase destroys toxic glycolytic side products in mammals and yeast

Fluorescence probes to detect lipid-derived radicals

June 13th, 2016 by Ken-ichi Yamada

Nature Chemical Biology 12, 608 (2016). doi:10.1038/nchembio.2105

Authors: Ken-ichi Yamada, Fumiya Mito, Yuta Matsuoka, Satsuki Ide, Kazushige Shikimachi, Ayano Fujiki, Daiki Kusakabe, Yuma Ishida, Masataka Enoki, Arisa Tada, Miyuki Ariyoshi, Toshihide Yamasaki & Mayumi Yamato

Dual Function of Phosphoubiquitin in Activation of Parkin [Molecular Bases of Disease]

June 9th, 2016 by Walinda, E., Morimoto, D., Sugase, K., Shirakawa, M.

Mutations in the gene encoding parkin, an auto-inhibited E3 ubiquitin ligase that functions in the clearance of damaged mitochondria, are the most common cause of autosomal recessive juvenile Parkinsonism. The mechanism regulating parkin activation remains poorly understood. Here we show, by using isothermal titration calorimetry, solution NMR and fluorescence spectroscopy, that parkin can bind ubiquitin and phosphomimetic ubiquitin by recognizing the canonical hydrophobic patch and C-terminus of ubiquitin. The affinity of parkin for both phosphomimetic and unmodified ubiquitin is markedly enhanced upon removal of the ubiquitin-like (UBL) domain of parkin. This suggests that the agonistic binding of ubiquitin to parkin in trans is counterbalanced by the antagonistic activity of the parkin UBL domain in cis. Intriguingly, UBL binding is enthalpy-driven, whereas ubiquitin binding is driven by an increase in the total entropy of the system. These thermodynamic differences are explained by different chemistry in the ubiquitin- and UBL- binding pockets of parkin and, as shown by molecular dynamics simulations, are not a consequence of changes in protein conformational entropy. Indeed, comparison of conformational fluctuations reveals that the RING1-IBR element becomes considerably more rigid upon complex formation. A model of parkin activation is proposed in which E2~Ub binding triggers large-scale diffusional motion of the RING2 domain toward the ubiquitin-stabilized RING1-IBR assembly to complete formation of the active parkin/E2~Ub transfer complex. Thus, ubiquitin plays a dual role in parkin activation by competing with the inhibitory UBL domain and stabilizing the active form of parkin.

Copper regulates cyclic-AMP-dependent lipolysis

June 6th, 2016 by Lakshmi Krishnamoorthy

Nature Chemical Biology 12, 586 (2016). doi:10.1038/nchembio.2098

Authors: Lakshmi Krishnamoorthy, Joseph A Cotruvo, Jefferson Chan, Harini Kaluarachchi, Abigael Muchenditsi, Venkata S Pendyala, Shang Jia, Allegra T Aron, Cheri M Ackerman, Mark N Vander Wal, Timothy Guan, Lukas P Smaga, Samouil L Farhi, Elizabeth J New, Svetlana Lutsenko & Christopher J Chang