3,099 results found
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Ancestral resurrection reveals evolutionary mechanisms of kinase plasticity

    Conor J Howard et al.
    Reconstructing ancestral enzymes has revealed that a switch in kinase substrate preference evolved via an expanded specificity intermediate that is tolerated in vivo, thus providing a path for kinase diversification.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Molecular basis of sidekick-mediated cell-cell adhesion and specificity

    Kerry M Goodman et al.
    Crystal structures of synaptic recognition molecules Sidekick-1 and -2 reveal a single homodimer interaction mode responsible for both cell-cell recognition and cis-clustering, suggesting that competition between cis and trans interactions may be critical to specificity.
    1. Chromosomes and Gene Expression

    CRISPRi is not strand-specific at all loci and redefines the transcriptional landscape

    Françoise S Howe et al.
    CRISPR interference (CRISPRi), which uses small guide RNAs to target catalytically dead Cas9 protein to chromatin, disrupts existing transcription units and generates new sites for initiation and termination of transcription on both strands of DNA.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Antiparallel protocadherin homodimers use distinct affinity- and specificity-mediating regions in cadherin repeats 1-4

    John M Nicoludis et al.
    Clustered and non-clustered protocadherins form antiparallel homodimers in which distinct regions of the extended interface demonstrate a division of labor between driving affinity and determining specificity.
    1. Biochemistry and Chemical Biology

    Intrinsic sequence specificity of the Cas1 integrase directs new spacer acquisition

    Clare Rollie et al.
    The acquisition of new foreign DNA by the prokaryotic adaptive immune system CRISPR-Cas is shown to depend on the fundamental sequence specificity of the Cas1 integrase.
    1. Structural Biology and Molecular Biophysics

    Casposase structure and the mechanistic link between DNA transposition and spacer acquisition by CRISPR-Cas

    Alison B Hickman et al.
    The tetrameric structure of a casposase bound to DNA and its biochemical properties show how a transposase could have evolved to perform CRISPR-Cas spacer acquisition.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Molecular basis of synaptic specificity by immunoglobulin superfamily receptors in Drosophila

    Shouqiang Cheng et al.
    Fly protein families Dprs and DIPs can create a multitude of complementary interfaces for homo- and heterophilic adhesion complexes, resulting in instructive roles for connectivity in the motor neuron circuitry.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    γ-Protocadherin structural diversity and functional implications

    Kerry Marie Goodman et al.
    Crystal structures of γ-protocadherin cell-cell recognition dimers reveal the determinants of clustered protocadherin homophilic specificity and cis interaction region structures alongside mutagenesis data identify the putative cis interface.
    1. Neuroscience

    Patterned perturbation of inhibition can reveal the dynamical structure of neural processing

    Sadra Sadeh, Claudia Clopath
    Neuronal networks with strong functional specificity of connections between excitatory and inhibitory neurons show specific dynamics of inhibitory stabilization, accompanied with rapid spontaneous activity transitions between highly selective functional states.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular insights into RNA and DNA helicase evolution from the determinants of specificity for a DEAD-box RNA helicase

    Anna L Mallam et al.
    The core domains of an RNA helicase interact with a wide variety of NTPs and nucleic acids suggesting how related enzymes may have evolved to have diverse functions.

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