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    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insights into the light-driven auto-assembly process of the water-oxidizing Mn4CaO5-cluster in photosystem II

    Miao Zhang et al.
    The structures of photosystem II, with the water-oxidizing Mn4CaO5-cluster fully removed and in an intermediate assembly state, show that photoassembly is facilitated by perfectly pre-arranged protein ligands of the five metal ions.
    1. Biochemistry and Chemical Biology

    Exchange of water for sterol underlies sterol egress from a StARkin domain

    George Khelashvili et al.
    The capture and export of a hydrophobic sterol molecule from the binding pocket of a Lam/GramD1 sterol-binding protein is unexpectedly mediated by water.
    1. Neuroscience

    Correcting for physical distortions in visual stimuli improves reproducibility in zebrafish neuroscience

    Timothy W Dunn, James E Fitzgerald
    Computational analyses quantitatively account for optical refraction at air-water interfaces to enable visual neuroscientists to present distortion-free stimuli to underwater animals.
    1. Structural Biology and Molecular Biophysics

    The primary structural photoresponse of phytochrome proteins captured by a femtosecond X-ray laser

    Elin Claesson et al.
    Time-resolved crystallography provides insight into the photochemical reactions in photoreceptor proteins, explaining the earliest steps of how plants, fungi and bacteria sense red light.
    1. Ecology

    Experimental and observational studies find contrasting responses of soil nutrients to climate change

    ZY Yuan et al.
    Experimental manipulations and environmental gradients, the two common-used approaches, are not at all comparable for predicting the impacts of climate change on nutrient cycling.
    1. Epidemiology and Global Health
    2. Microbiology and Infectious Disease

    Species-wide whole genome sequencing reveals historical global spread and recent local persistence in Shigella flexneri

    Thomas R Connor et al.
    Shigella flexneri, globally the most frequent cause of bacterial dysentery, is far more diverse, and has caused disease around the world for far longer than other Shigella species by persisting in local environments over extended timescales.
    1. Structural Biology and Molecular Biophysics

    Routine single particle CryoEM sample and grid characterization by tomography

    Alex J Noble et al.
    Fiducial-less tomography on single particle cryoEM samples reveals that most particles are adsorbed to the air-water interface and allows for researchers to diagnose and solve sample, grid, ice thickness, collection, and processing issues.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Positively selected modifications in the pore of TbAQP2 allow pentamidine to enter Trypanosoma brucei

    Ali H Alghamdi et al.
    Study of TbAQP2 adaptations and substrate interactions shows how this aquaglyceroporin enables cellular entry of large antimicrobial agents in Trypanosoma brucei.
    1. Neuroscience

    In vivo imaging with a water immersion objective affects brain temperature, blood flow and oxygenation

    Morgane Roche et al.
    Brain temperature and oxygenation vary according to the imaging conditions during two-photon microscopy.
    1. Ecology
    2. Evolutionary Biology

    Alcids ‘fly’ at efficient Strouhal numbers in both air and water but vary stroke velocity and angle

    Anthony B Lapsansky et al.
    Four species of seabird produce efficient propulsive wakes while flying in the air and while swimming underwater suggesting that selection has optimized these species for locomotion in remarkably different fluids.