1,501 results found
    1. Structural Biology and Molecular Biophysics

    HDX-MS reveals nucleotide-dependent, anti-correlated opening and closure of SecA and SecY channels of the bacterial translocon

    Zainab Ahdash et al.
    Hydrogen-deuterium exchange mass spectrometry reveals nucleotide-driven conformational regulation of Sec protein-channel to help impose directionality for protein transport through the Sec complex.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    ATP-induced asymmetric pre-protein folding as a driver of protein translocation through the Sec machinery

    Robin A Corey et al.
    How the process of protein folding may be controlled by the Sec machinery to assist protein transport across membranes.
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Spatial and temporal organization of RecA in the Escherichia coli DNA-damage response

    Harshad Ghodke et al.
    Phase separated DNA-free stored forms of RecA dissolve in response to DNA damage to make RecA available for repair and recombination reactions as part of the bacterial (Escherichia coli) SOS response.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    A unifying mechanism for the biogenesis of membrane proteins co-operatively integrated by the Sec and Tat pathways

    Fiona J Tooke et al.
    Bioinformatics and experimental approaches identify families of membrane proteins requiring the co-ordinated action of the Sec pathway and Tat pathways for their integration and define features of the polypeptides that mediate interaction with these pathways.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    The C-terminal tail of the bacterial translocation ATPase SecA modulates its activity

    Mohammed Jamshad et al.
    The interaction of SecA with its substrate proteins is regulated by its evolutionarily conserved C-terminal tail, which autoinhibits SecA unless SecA binds to the ribosome.
    1. Ecology
    2. Evolutionary Biology

    Diverse deep-sea anglerfishes share a genetically reduced luminous symbiont that is acquired from the environment

    Lydia J Baker et al.
    Environmental transmission is atypical of symbionts that have undergone genome degradation, yet genetically reduced deep-sea anglerfish symbionts likely persist in the deep sea biome in search of a new host.
    1. Biochemistry and Chemical Biology

    Efficient analysis of mammalian polysomes in cells and tissues using Ribo Mega-SEC

    Harunori Yoshikawa et al.
    Translationally active polysomes from mammalian cells/tissues are successfully separated with rapidity, high efficiency and exceptional reproducibility by a SEC-based approach, an accessible alternative to the conventional sucrose density gradient analysis.
    1. Microbiology and Infectious Disease

    Mycobacterium tuberculosis SatS is a chaperone for the SecA2 protein export pathway

    Brittany K Miller et al.
    SatS of Mycobacterium tuberculosis is a new protein export chaperone with a role in exporting proteins by the specialized SecA2 pathway and a role in intracellular growth in macrophages.
    1. Developmental Biology
    2. Genetics and Genomics

    Deployment of a retinal determination gene network drives directed cell migration in the sea urchin embryo

    Megan L Martik, David R McClay
    The gene regulatory network controlling directed cell migration in a sea urchin is strikingly similar to a sub-circuit for eye development in Drosophila, suggesting that ancient systems-level controls may be adapted for diverse functions in different animals.
    1. Cell Biology
    2. Developmental Biology

    Early asymmetric cues triggering the dorsal/ventral gene regulatory network of the sea urchin embryo

    Vincenzo Cavalieri, Giovanni Spinelli
    During early embryogenesis of the sea urchin, asymmetrical positioning of the dorsal/ventral organizer relies upon the suppression of organizer activities in dorsal blastomeres by the Hbox12 homeodomain-containing repressor.

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