Misregulation of Drosophila Myc Disrupts Circadian Behavior and Metabolism.

Annie L Hsieh, Xiangzhong Zheng, Zhifeng Yue, Zachary E Stine, Anthony Mancuso, Seth D Rhoades, Rebekah Brooks, Aalim M Weljie, Robert N Eisenman, Amita Sehgal, Chi V Dang

Cell reports 2019 Nov 12

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Drosophila Myc (dMyc) is highly conserved and functions as a transcription factor similar to mammalian Myc. We previously found that oncogenic Myc disrupts the molecular clock in cancer cells. Here, we demonstrate that misregulation of dMyc expression affects Drosophila circadian behavior. dMyc overexpression results in a high percentage of arrhythmic flies, concomitant with increases in the expression of clock genes cyc, tim, cry, and cwo. Conversely, flies with hypomorphic mutations in dMyc exhibit considerable arrhythmia, which can be rescued by loss of dMnt, a suppressor of dMyc activity. Metabolic profiling of fly heads revealed that loss of dMyc and its overexpression alter steady-state metabolite levels and have opposing effects on histidine, the histamine precursor, which is rescued in dMyc mutants by ablation of dMnt and could contribute to effects of dMyc on locomotor behavior. Our results demonstrate a role of dMyc in modulating Drosophila circadian clock, behavior, and metabolism. Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved.

Citation

Annie L Hsieh, Xiangzhong Zheng, Zhifeng Yue, Zachary E Stine, Anthony Mancuso, Seth D Rhoades, Rebekah Brooks, Aalim M Weljie, Robert N Eisenman, Amita Sehgal, Chi V Dang. Misregulation of Drosophila Myc Disrupts Circadian Behavior and Metabolism. Cell reports. 2019 Nov 12;29(7):1778-1788.e4