2,846 results found
    1. Cell Biology

    Reconstitution of self-organizing protein gradients as spatial cues in cell-free systems

    Katja Zieske, Petra Schwille
    A minimal cell-like system with defined geometry has been used to investigate the establishment and spatial control of a protein gradient that positions the bacterial cell division machinery.
    1. Developmental Biology
    2. Cell Biology

    Direct visualization of a native Wnt in vivo reveals that a long-range Wnt gradient forms by extracellular dispersal

    Ariel M Pani, Bob Goldstein
    Free, extracellular dispersal of Wnt proteins generates a long-range gradient during animal development and is required for signaling.
    1. Microbiology and Infectious Disease
    2. Physics of Living Systems

    Protein gradients on the nucleoid position the carbon-fixing organelles of cyanobacteria

    Joshua S MacCready et al.
    Carboxysomes, the carbon-fixation machinery of cyanobacteria, are equidistantly-positioned by dynamic gradients of the protein McdA on the nucleoid that emerge through interaction with a previously unidentified carboxysome factor, McdB.
    1. Developmental Biology

    Bicoid gradient formation and function in the Drosophila pre-syncytial blastoderm

    Zehra Ali-Murthy, Thomas B Kornberg
    The concentration gradient of Bicoid protein positions gene expression domains along the anterior/posterior axis of the Drosophila embryo during the cleavage, pre-syncytial blastoderm stages.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Ankyrin-B is a PI3P effector that promotes polarized α5β1-integrin recycling via recruiting RabGAP1L to early endosomes

    Fangfei Qu et al.
    Ankyrin-B – through interactions with PI3P lipids, dynactin and RabGAP1L – functions as a critical node in the protein circuitry underlying polarized recycling of α5β1-integrin to enable haptotaxis along fibronectin gradients.
    1. Cell Biology

    Cortical regulation of cell size by a sizer cdr2p

    Kally Z Pan et al.
    It is shown that fission yeast cells sense their size by measuring their surface area through a membrane-associated sizer protein cdr2p.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Dynamic subcellular localization of a respiratory complex controls bacterial respiration

    François Alberge et al.
    The localization of respiratory complexes in the cell membrane emerges as a critical factor for controlling respiration in bacteria.
    1. Computational and Systems Biology
    2. Developmental Biology

    Systems biology derived source-sink mechanism of BMP gradient formation

    Joseph Zinski et al.
    Embryo-wide quantitative analysis of BMP signaling in zebrafish embryos, combined with a mathematical model-based computational screen, challenges the prevailing model of an antagonist counter-gradient shaping the gastrula BMP morphogen gradient and supports an antagonist sink with BMP diffusion mechanism.
    1. Computational and Systems Biology
    2. Developmental Biology

    Dynamics of BMP signaling and distribution during zebrafish dorsal-ventral patterning

    Autumn P Pomreinke et al.
    Patterning of the dorsal-ventral axis in zebrafish is mediated by a graded source-sink mechanism in which diffusing BMP, produced from a ventrally biased source, is inhibited by dorsally-produced chordin.
    1. Computational and Systems Biology
    2. Developmental Biology

    Noise modulation in retinoic acid signaling sharpens segmental boundaries of gene expression in the embryonic zebrafish hindbrain

    Julian Sosnik et al.
    Direct measurements of retinoic acid using fluorescence lifetime imaging reveal a new role for cellular retinoic acid binding proteins in noise attenuation that is critical to sharpen hindbrain rhombomere boundaries.

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