296 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. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular mechanism of thermosensory function of human heat shock transcription factor Hsf1

    Nikolai Hentze et al.
    Heat-induced local unfolding allows Hsf1 to form trimers and bind to DNA, which depends on Hsf1 concentration and is promoted, not inhibited, by Hsp90.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Tracing a protein’s folding pathway over evolutionary time using ancestral sequence reconstruction and hydrogen exchange

    Shion An Lim et al.
    Pulsed-labeling hydrogen exchange on the ribonuclease H family show that the major folding intermediate is conserved over three billion years of evolution, but the path leading to this intermediate varies.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Ric-8A, a G protein chaperone with nucleotide exchange activity induces long-range secondary structure changes in Gα

    Ravi Kant et al.
    Hydrogen-Deuterium exchange experiments show that Ric-8A induces similar dynamic changes in the structure of Gα as G protein-coupled receptors, yet protects a larger surface of the nucleotide-binding Ras domain.
    1. Structural Biology and Molecular Biophysics

    Auto-regulation of Rab5 GEF activity in Rabex5 by allosteric structural changes, catalytic core dynamics and ubiquitin binding

    Janelle Lauer et al.
    Understanding the complex auto-regulatory mechanisms for guanine nucleotide exchange factors is critically important for fully appreciating the layers of control for small GTPases.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Structural organization of a major neuronal G protein regulator, the RGS7-Gβ5-R7BP complex

    Dipak N Patil et al.
    Atomic details on structural organization and conformational dynamics of the key regulator of neuronal signaling shed light on its allosteric regulation and role in regulating cellular pathways.
    1. Developmental Biology
    2. Structural Biology and Molecular Biophysics

    A crystal structure of a collaborative RNA regulatory complex reveals mechanisms to refine target specificity

    Chen Qiu et al.
    A Caenorhabitis elegans RNA-binding protein, FBF-2, modulates RNA sequence motif recognition through conformational change and partner protein interaction.
    1. Cell Biology

    Misfolded GPI-anchored proteins are escorted through the secretory pathway by ER-derived factors

    Eszter Zavodszky, Ramanujan S Hegde
    ER-resident chaperones and cargo receptors make excursions to the cell surface and endocytic compartments when they accompany misfolded clients to lysosomes for degradation.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    Ion counting demonstrates a high electrostatic field generated by the nucleosome

    Magdalena Gebala et al.
    First experimental studies on the ion atmosphere around a nucleosome provide a quantitative analysis of the molecule's electrostatic properties.

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