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    1. Structural Biology and Molecular Biophysics

    Nuclear export receptor CRM1 recognizes diverse conformations in nuclear export signals

    Ho Yee Joyce Fung et al.
    Building on previous work (Fung et al., 2015), the structures of eight new nuclear export signal (NES) peptides bound to Exportin CRM1 are reported, revealing striking diversity in NES structures, a small conserved secondary structural element, and a CRM1 residue that functions as a selectivity filter.
    1. Chromosomes and Gene Expression
    2. Developmental Biology

    Maternally inherited piRNAs direct transient heterochromatin formation at active transposons during early Drosophila embryogenesis

    Martin H Fabry et al.
    Maternally deposited Piwi-piRNA complexes co-transcriptionally repress transposable elements that transiently become active in somatic cells of the developing Drosophila embryo.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    A novel GTP-binding protein–adaptor protein complex responsible for export of Vangl2 from the trans Golgi network

    Yusong Guo et al.
    The ability of epithelial cells to distinguish between domains on opposing cell surfaces within a tissue, a property known as planar cell polarity, relies on proteins and protein complexes directing the traffic of signaling proteins to specific locations on the cell surface membrane.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Mitochondria-specific photoactivation to monitor local sphingosine metabolism and function

    Suihan Feng et al.
    Caged, photoactivatible sphingosine localized to mitochondria permits demonstration of the importance of subcellular localization on lipid metabolism and signaling.
    1. Immunology and Inflammation

    Composition and structure of synaptic ectosomes exporting antigen receptor linked to functional CD40 ligand from helper T cells

    David G Saliba et al.
    TCR and CD40L microclusters are linked in synaptic ectosomes (extracellular vesicles) and released in the immunological synapse by helper T cells and induce dendritic cell maturation and cytokine production.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Proteomic mapping of cytosol-facing outer mitochondrial and ER membranes in living human cells by proximity biotinylation

    Victoria Hung et al.
    One minute biotinylation with APEX2 peroxidase in living cells identifies established and new components of mitochondrial and ER membranes; dataset intersection and overexpression screen identifies SYNJ2BP overexpression as inducing mitochondria-rough ER contacts.
    1. Structural Biology and Molecular Biophysics

    Characterization of the kinetic cycle of an ABC transporter by single-molecule and cryo-EM analyses

    Ling Wang et al.
    The conformational dynamics of multidrug resistance protein 1 (MRP1) are tracked in real time by single-molecule fluorescence resonance energy transfer experiments, which elucidate the rate-limiting mechanism of MRP1's transport cycle.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    The deubiquitylase Ubp15 couples transcription to mRNA export

    Fanny Eyboulet et al.
    Ubp15 regulates the ubiquitylation of the export adaptor Mex67.
    1. Structural Biology and Molecular Biophysics

    Molecular structures of the eukaryotic retinal importer ABCA4

    Fangyu Liu et al.
    The structures of ABCA4 in two conformations provide a framework to understand its transport mechanism.
    1. Genetics and Genomics

    Alternative polyadenylation mediates genetic regulation of gene expression

    Briana E Mittleman et al.
    Genetic variation can impact multiple levels of gene regulation and disease through alternative polyadenylation.