10,872 results found
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structure of respiratory complex I at work

    Kristian Parey et al.
    The site of ubiquinone binding observed in the cryo-EM structure of respiratory complex I during turnover supports a two-state stabilization change mechanism.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Genomic and phenotypic evolution of Escherichia coli in a novel citrate-only resource environment

    Zachary D Blount et al.
    Transposable elements and gene amplifications can provide variation needed for novel trait refinement and adaptation to new niches, though a recalcitrant organism-environment mismatch may persist.
    1. Neuroscience

    Perception as a closed-loop convergence process

    Ehud Ahissar, Eldad Assa
    Perception is proposed to be a dynamic motor-sensory closed-loop process in which information flows through the environment and the brain in continuous loops, converging towards steady-state percepts.
    1. Microbiology and Infectious Disease

    Profiling of myristoylation in Toxoplasma gondii reveals an N-myristoylated protein important for host cell penetration

    Malgorzata Broncel et al.
    Myristoylation of a secreted protein, identified in a global myristoylation analysis of the eukaryotic parasite Toxoplasma gondii, is important for host cell invasion.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Measuring protein stability in the GroEL chaperonin cage reveals massive destabilization

    Ilia Korobko et al.
    Protein stability in the cage formed by the chaperonin GroEL and its cofactor GroES is reduced by more than 5 kcal mol-1 relative to that in bulk solution.
    1. Stem Cells and Regenerative Medicine

    Murine HSCs contribute actively to native hematopoiesis but with reduced differentiation capacity upon aging

    Petter Säwen et al.
    Using a lineage tracing model, it is demonstrated that adult murine hematopoiesis is contingent on the continuous output from HSCs, with quantitative contributions that are dependent on lineage-type and age.
    1. Cell Biology

    Quantitative regulation of the dynamic steady state of actin networks

    Angelika Manhart et al.
    Cells are able to control the actin network length and steering by adjusting geometric, structural, or biochemical parameters such as ADF/Cofilin and actin concentrations, and network width.
    1. Evolutionary Biology

    Computed tomography shows high fracture prevalence among physically active forager-horticulturalists with high fertility

    Jonathan Stieglitz et al.
    High reproductive effort constrains bone tissue response to physical activity-induced mechanical loading.
    1. Cell Biology
    2. Neuroscience

    Ablation of SNX6 leads to defects in synaptic function of CA1 pyramidal neurons and spatial memory

    Yang Niu et al.
    SNX6 regulates the distribution of a protein called Homer1b/c to distal dendrites, enabling the latter to stabilize the synapses and thereby support memory formation.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Protein sequences bound to mineral surfaces persist into deep time

    Beatrice Demarchi et al.
    A chemically unstable ostrich eggshell peptide survives for at least 3.8 million years at the equator, stabilized by strong mineral interactions.

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