2,610 results found
    1. Biochemistry and Chemical Biology
    2. Neuroscience

    Complementary shifts in photoreceptor spectral tuning unlock the full adaptive potential of ultraviolet vision in birds

    Matthew B Toomey et al.
    Birds that see ultraviolet light tune the sensitivity of their short-wavelength photoreceptors with colored filters to maximize the number of colors they can see.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Immune genes are hotspots of shared positive selection across birds and mammals

    Allison J Shultz, Timothy B Sackton
    Pathogens, particularly viruses, target the same genes over deep evolutionary time, resulting in shared signatures of positive selection and transcriptional responses at the same genes.
    1. Evolutionary Biology

    Birds land reliably on complex surfaces by adapting their foot-surface interactions upon contact

    William RT Roderick et al.
    When landing, Pacific parrotlets exhibit stereotyped leg and wing dynamics regardless of perch diameter and texture, but foot and claw kinematics become surface-specific upon touchdown to successfully grasp the perch.
    1. Computational and Systems Biology
    2. Neuroscience

    A kinematic synergy for terrestrial locomotion shared by mammals and birds

    Giovanna Catavitello et al.
    General principles of the limb segment control for terrestrial locomotion have emerged in evolution and highlight the existence of the laws of biological motion that apply to various animal species.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    The AFF4 scaffold binds human P-TEFb adjacent to HIV Tat

    Ursula Schulze-Gahmen et al.
    Structure-function analysis of the super elongation complex formed when HIV replicates inside cells reveals that the HIV-1 Tat protein binds to a cleft between P-TEFb, an enzyme that is involved in normal transcription, and AFF4, a protein that is used to build the super elongation complex
    1. Biochemistry and Chemical Biology
    2. Neuroscience

    Somatostatin binds to the human amyloid β peptide and favors the formation of distinct oligomers

    Hansen Wang et al.
    The cyclic neuropeptide somatostatin binds to human Aβ1-42 through an interface that critically relies on a specific tryptophan, thereby blocking the propensity of Aβ to aggregate, a critical step in the pathobiology of Alzheimer's disease.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    La-related protein 1 (LARP1) binds the mRNA cap, blocking eIF4F assembly on TOP mRNAs

    Roni M Lahr et al.
    La-related protein 1 specifically and directly binds the 5' cap and first nucleotide of mRNAs encoding ribosomal proteins and translation factors, inhibiting the assembly of translation initiation factors on these messages and therefore their translation.
    1. Structural Biology and Molecular Biophysics

    A novel pH-dependent membrane peptide that binds to EphA2 and inhibits cell migration

    Daiane S Alves et al.
    The transmembrane domain of the EphA2 receptor has been transformed into a novel amphitropic peptide that binds to the EphA2 receptor and inhibits cell migration.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Highly efficient 5' capping of mitochondrial RNA with NAD+ and NADH by yeast and human mitochondrial RNA polymerase

    Jeremy G Bird et al.
    Eukaryotic mitochondrial RNA polymerases cap RNA with NAD with much higher efficiencies than nuclear RNA polymerase II; as a consequence, mitochondrial RNAs have remarkably high levels of NAD capping.
    1. Evolutionary Biology

    A non-archaeopterygid avialan theropod from the Late Jurassic of southern Germany

    Oliver WM Rauhut et al.
    A new taxon from the Late Jurassic of southern Germany represents the second volant bird known from that time period and documents the improvement of flapping flight in bird evolution.

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