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    1. Biochemistry and Chemical Biology

    Lack of activity of recombinant HIF prolyl hydroxylases (PHDs) on reported non-HIF substrates

    Matthew E Cockman et al.
    Assays using recombinant HIF prolyl hydroxylases did not support hydroxylation of more than 20 reported non-HIF substrates under conditions where robust HIF hydroxylation was observed.
    1. Cell Biology
    2. Developmental Biology

    Synthetic enzyme-substrate tethering obviates the Tolloid-ECM interaction during Drosophila BMP gradient formation

    Jennifer Winstanley et al.
    The in vivo activity of Tolloid during Drosophila dorsal-ventral patterning is regulated by the differential specificity of its non-catalytic domains in mediating substrate and Collagen IV interaction.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Intrinsic disorder within an AKAP-protein kinase A complex guides local substrate phosphorylation

    F Donelson Smith et al.
    Structural analysis of an AKAP18-protein kinase A complex reveals that regions of intrinsic disorder impact the phosphorylation of preferred substrates.
    1. Structural Biology and Molecular Biophysics

    Casein kinase 1 dynamics underlie substrate selectivity and the PER2 circadian phosphoswitch

    Jonathan M Philpott et al.
    A conformational switch in the Casein Kinase 1 activation loop controls substrate preference to regulate the abundance of the clock protein PERIOD2 and circadian timekeeping.
    1. Structural Biology and Molecular Biophysics

    Structural basis of substrate recognition by a polypeptide processing and secretion transporter

    Virapat Kieuvongngam et al.
    Cryo-EM structure of a peptidase-containing ABC transporter in complex with its protein substrate reveals a mechanism of coupling substrate cleavage to translocation.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Substrate transport and anion permeation proceed through distinct pathways in glutamate transporters

    Mary Hongying Cheng et al.
    Novel evidence on the molecular determinants of the dual function, anion permeation and substrate transport, of excitatory amino acid transporters opens avenues toward illuminating how these transporters regulate synaptic function and contribute to neurological conditions.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    3.3-Å resolution cryo-EM structure of human ribonucleotide reductase with substrate and allosteric regulators bound

    Edward J Brignole et al.
    Cryo-electron microscopy structures of human ribonucleotide reductase reveal molecular details of substrate selection and allosteric inhibition through assembly of its large subunit into a ring that excludes its small subunit.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Interactions between a subset of substrate side chains and AAA+ motor pore loops determine grip during protein unfolding

    Tristan A Bell et al.
    The AAA+ protein unfolding motor ClpX grips substrates with the uppermost part of its substrate-binding pore, and requires interactions with hydrophobic amino acid side chains to operate with optimal efficiency.
    1. Microbiology and Infectious Disease

    Mechanisms of substrate recognition by a typhoid toxin secretion-associated muramidase

    Tobias Geiger et al.
    Biochemical analyses and the crystal structure of TtsA reveal fundamental insight into the mechanisms by which this muramidase recognizes its peptidoglycan substrate to facilitate typhoid toxin secretion.
    1. Biochemistry and Chemical Biology

    Specific lid-base contacts in the 26s proteasome control the conformational switching required for substrate degradation

    Eric R Greene et al.
    The 26S proteasome lid subcomplex acts as an external scaffold whose interactions with the ATPase motor stabilize the substrate-engagement-competent state, and control conformational changes upon engagement for subsequent degradation steps.