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    1. Neuroscience

    Constitutive activation of kappa opioid receptors at ventral tegmental area inhibitory synapses following acute stress

    Abigail M Polter et al.
    Rats exposed to a single stressful event experience days-long constitutive activation of the kappa opioid receptor at inhibitory synapses in part of the brain’s reward system, which increases their drug-seeking behavior.
    1. Cancer Biology

    Sam68/KHDRBS1 is critical for colon tumorigenesis by regulating genotoxic stress-induced NF-κB activation

    Kai Fu et al.
    The nuclear protein Sam68 plays a role in the genotoxic stress-initiated "nuclear to cytoplasmic" activation of NF-κB and is involved in the development and survival of colon cancer.
    1. Cell Biology

    The RhoGAP activity of CYK-4/MgcRacGAP functions non-canonically by promoting RhoA activation during cytokinesis

    Donglei Zhang, Michael Glotzer
    Activation of the key regulator of cytokinesis, RhoA, involves an unexpected contribution by a RhoGAP domain.
    1. Chromosomes and Gene Expression

    Crl activates transcription by stabilizing active conformation of the master stress transcription initiation factor

    Juncao Xu et al.
    The cryo-EM structure of Escherichia coli Crl–TAC reveals the mechanism of DNA-contact-independent transcription activation.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Diversity and plasticity in Rab GTPase nucleotide release mechanism has consequences for Rab activation and inactivation

    Lars Langemeyer et al.
    Analysis of multiple guanine exchange factors shows that Rab activation can occur via a number of mechanistically distinct GDP-release pathways.
    1. Computational and Systems Biology
    2. Structural Biology and Molecular Biophysics

    Simulation of spontaneous G protein activation reveals a new intermediate driving GDP unbinding

    Xianqiang Sun et al.
    Combining powerful simulation methods uncovers the structural and dynamical changes driving G protein activation in atomic detail, revealing the allosteric network that triggers GDP release and reconciling diverse experimental data.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Single molecule analysis reveals reversible and irreversible steps during spliceosome activation

    Aaron A Hoskins et al.
    Single molecule experiments reveal competition between spliceosome activation and the discard of the triple small nuclear ribonucleoprotein complex.
    1. Neuroscience

    Catecholaminergic challenge uncovers distinct Pavlovian and instrumental mechanisms of motivated (in)action

    Jennifer C Swart et al.
    Motivational coupling of action to reward and inhibition to punishment is subserved by dissociable learning and choice processes, and is modulated by dopamine/noradrenaline transporter blockade.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Dynamic enhancer partitioning instructs activation of a growth-related gene during exit from naïve pluripotency

    Maxim Greenberg et al.
    Three-dimensional chromatin architecture facilitates a promoter switch in order to ensure maintained expression of a gene involved in growth during embryonic stem cell differentiation.
    1. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    Control of immune ligands by members of a cytomegalovirus gene expansion suppresses natural killer cell activation

    Ceri A Fielding et al.
    The human cytomegalovirus US12 gene family work co-operatively to degrade large numbers of immune ligands and prevent recognition by natural killer cells.