205 results found
    1. Microbiology and Infectious Disease
    2. Physics of Living Systems

    Influenza A virus surface proteins are organized to help penetrate host mucus

    Michael D Vahey, Daniel A Fletcher
    By distributing receptor-binding and receptor-destroying proteins asymmetrically on their surface, filamentous influenza A virus particles create a Brownian ratchet that facilitates their passage through mucus.
    1. Structural Biology and Molecular Biophysics

    Complete dissection of transcription elongation reveals slow translocation of RNA polymerase II in a linear ratchet mechanism

    Manchuta Dangkulwanich et al.
    Quantification of all the major on- and off-pathway kinetic parameters in the transcription elongation cycle reveals that RNA polymerase II translocates slowly in a linear, non-branched Brownian ratchet mechanism.
    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. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure and conformational states of the bovine mitochondrial ATP synthase by cryo-EM

    Anna Zhou et al.
    Structural analysis of the ATP synthase – in combination with evolutionary covariance analysis – reveals the fold of the a subunit and shows that the enzyme can adopt several different conformations, which support the Brownian ratchet model for generating rotation.
    1. Biochemistry and Chemical Biology
    2. Physics of Living Systems

    Direct measurement of the mechanical work during translocation by the ribosome

    Tingting Liu et al.
    ‘Optical tweezers’ measurements of single ribosomes and single mRNA molecules show that the translation rate depends exponentially on the applied force, and suggests that the ribosome functions as a Brownian ratchet.
    1. Structural Biology and Molecular Biophysics

    Transcription: On the move

    Robert A Forties et al.
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    1. Structural Biology and Molecular Biophysics

    Transcription: Overcoming chromatin barriers

    Babette E de Jong, John van Noort
    Single-molecule experiments reveal the dynamics of transcription through a nucleosome with single-base-pair accuracy.
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    1. Microbiology and Infectious Disease
    2. Physics of Living Systems

    Carboxysomes: How bacteria arrange their organelles

    Emilia Mauriello
    The structures responsible for photosynthesis in bacteria use the nucleoid and two unique proteins as a scaffold to position themselves.
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    1. Ecology
    2. Human Biology and Medicine

    Point of View: A transatlantic perspective on 20 emerging issues in biological engineering

    Bonnie C Wintle et al.
    Horizon scanning has been used to identify opportunities and risks presented by 20 emerging issues in the field of biological engineering.
    1. Ecology
    2. Evolutionary Biology

    The Natural History of Model Organisms: Nothobranchius furzeri, an 'instant' fish from an ephemeral habitat

    Martin Reichard, Matej Polačik
    The turquoise killifish from ephemeral pools in African savannah combines extremely short lifespan with a standard vertebrate body plan – ideal attributes for a laboratory animal.

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