447 results found
    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. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    High-resolution mapping of the neutralizing and binding specificities of polyclonal sera post-HIV Env trimer vaccination

    Adam S Dingens et al.
    HIV vaccine-induced binding and neutralizing antibody epitope specificities were mapped at high resolution directly from polyclonal sera, overcoming shortcomings in traditional serum mapping approaches and enabling highly detailed vaccine design.
    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. Structural Biology and Molecular Biophysics

    Two-way communication between SecY and SecA suggests a Brownian ratchet mechanism for protein translocation

    William John Allen et al.
    Evidence is presented that supports a completely new, diffusion-driven mechanism for transporting proteins across membranes in bacteria.
    1. Cell Biology
    2. Physics of Living Systems

    Concerted action of kinesins KIF5B and KIF13B promotes efficient secretory vesicle transport to microtubule plus ends

    Andrea Serra-Marques et al.
    The function and distribution of kinesin motors on exocytotic vesicles is dissected and visualized through a combination of gene knockout experiments, high-resolution microscopy and advanced data analysis.
    1. Microbiology and Infectious Disease

    Septal secretion of protein A in Staphylococcus aureus requires SecA and lipoteichoic acid synthesis

    Wenqi Yu et al.
    Surface protein precursors traffic to lipoteichoic acid-rich septal membranes of Staphylococcus aureus for cleavage of their YSIRK-GXXS motif signal peptides and SecA-mediated translocation across the plasma membrane.
    1. Cell Biology

    The DWORF micropeptide enhances contractility and prevents heart failure in a mouse model of dilated cardiomyopathy

    Catherine A Makarewich et al.
    Cardiac-specific overexpression of a recently discovered micropeptide, DWORF, enhances calcium cycling and contractility in the heart and rescues the heart failure phenotype of a genetic mouse model of dilated cardiomyopathy.
    1. Evolutionary Biology

    The birth of a bacterial tRNA gene by large-scale, tandem duplication events

    Gökçe B Ayan et al.
    A bacterial tRNA gene set rapidly evolves, compensating the loss of one tRNA type by large duplication events that increase the gene copy number of a second, different tRNA type.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Mapping person-to-person variation in viral mutations that escape polyclonal serum targeting influenza hemagglutinin

    Juhye M Lee et al.
    Single viral mutations can escape polyclonal human immunity to influenza hemagglutinin, but different mutations escape the immunity of different people.
    1. Chromosomes and Gene Expression

    A KRAS-directed transcriptional silencing pathway that mediates the CpG island methylator phenotype

    Ryan W Serra et al.
    A pathway directed by the KRAS oncoprotein leads to aberrant hypermethylation and transcriptional silencing of many genes including tumor suppressors, thereby promoting tumor development.

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