4,418 results found
    1. Computational and Systems Biology
    2. Chromosomes and Gene Expression

    Single-cell analysis of transcription kinetics across the cell cycle

    Samuel O Skinner et al.
    By properly accounting for gene copy number and cell-cycle effects, single cell snapshots of nascent and mature mRNA can be used to unveil the stochastic kinetics of gene activity.
    1. Computational and Systems Biology

    Design principles of autocatalytic cycles constrain enzyme kinetics and force low substrate saturation at flux branch points

    Uri Barenholz et al.
    The stability of metabolic autocatalytic cycles that are widespread in central metabolism limits the affinities of enzymes at flux branch points and explains excess expression of these enzymes.
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    Structural and kinetic analysis of the COP9-Signalosome activation and the cullin-RING ubiquitin ligase deneddylation cycle

    Ruzbeh Mosadeghi et al.
    The general principles that underlie the mechanism of action of the COP9-Signalosome, a key regulator of the largest family of ubiquitin ligase enzymes in human cells, have been identified using structural and kinetic techniques.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Kinesin motility is driven by subdomain dynamics

    Wonmuk Hwang et al.
    The motor protein kinesin utilizes its fuel molecule by active and concerted motions of its subdomains, while it rapidly interacts with the microtubule track by forming a wet and dynamic interface.
    1. Microbiology and Infectious Disease

    Cell cycle constraints on capsulation and bacteriophage susceptibility

    Silvia Ardissone et al.
    A multi-layered and conserved cell cycle mechanism prevents capsulation, long known as a bacterial virulence determinant, in G1-phase and concurrently licenses bacteriophage-mediated genetic exchange prior to entry into S-phase.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    The kinesin-5 tail domain directly modulates the mechanochemical cycle of the motor domain for anti-parallel microtubule sliding

    Tatyana Bodrug et al.
    Biochemical, single molecule, cell and structural biology studies reveal an interaction between the kinesin-5 tail and motor domains regulating high-force production, which is critical for microtubule sliding motility.
    1. Biochemistry and Chemical Biology
    2. Genetics and Genomics

    Genetic analysis reveals functions of atypical polyubiquitin chains

    Fernando Meza Gutierrez et al.
    A comprehensive genetic interaction screen uncovered biological roles of K11 linkages in amino acid homeostasis and cell cycle regulation in yeast.
    1. Neuroscience

    Identification of Redeye, a new sleep-regulating protein whose expression is modulated by sleep amount

    Mi Shi et al.
    A gene found in Drosophila, and named redeye, encodes a protein that accumulates during sleep deprivation and forms part of the homeostatic system that promotes and maintains sleep.
    1. Cell Biology

    LINE-1 protein localization and functional dynamics during the cell cycle

    Paolo Mita et al.
    A combination of functional, biochemical and imaging studies show that LINE-1/L1 proteins and mRNA enter the nucleus through mitotic nuclear membrane breakdown, interact with components of the DNA replication fork and mediate retrotransposition during S phase.

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