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    1. Cell Biology
    2. Computational and Systems Biology

    Bistability of a coupled Aurora B kinase-phosphatase system in cell division

    Anatoly V Zaytsev et al.
    Self-activating Aurora B kinase, opposed by an inhibitory phosphatase, forms spatial phosphorylation patterns during cell division.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanism of chiral proofreading during translation of the genetic code

    Sadeem Ahmad et al.
    Structural biology has elucidated the mechanism of a configuration-specific enzyme that decouples D-amino acids from the translational machinery and, therefore, is involved in the enforcement of homochirality during protein synthesis.
    1. Genetics and Genomics

    Firefly genomes illuminate parallel origins of bioluminescence in beetles

    Timothy R Fallon et al.
    The first genomic view of beetle luciferase evolution indicates evolutionary independence of luciferase between fireflies and click-beetles, and provide valuable datasets which will accelerate the discovery of new biotechnological tools.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Robust cullin-RING ligase function is established by a multiplicity of poly-ubiquitylation pathways

    Spencer Hill et al.
    Human cullin-RING ligases are buffered to a much greater extent than had been previously appreciated, and the roles of ubiquitin chain extension enzymes are far more nuanced at physiological concentrations.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanism of ubiquitin ligation and lysine prioritization by a HECT E3

    Hari B Kamadurai et al.
    Structural studies reveal the mechanism by which a HECT E3 ubiquitin ligase carries out E2-to-E3-to-substrate ubiquitin transfer and prioritizes target lysines for ubiquitination.
    1. Structural Biology and Molecular Biophysics

    Functional implications of MIR domains in protein O-mannosylation

    Antonella Chiapparino et al.
    The MIR domain of protein-O-mannosyltransferases participates in glycosylation by binding mannosylated peptides and regulates enzyme processivity.
    1. Chromosomes and Gene Expression
    2. Developmental Biology

    The E2 Marie Kondo and the CTLH E3 ligase clear deposited RNA binding proteins during the maternal-to-zygotic transition

    Michael Zavortink et al.
    In fruit flies, maternally deposited RNA-binding proteins are removed during the maternal-to-zygotic transition via a mechanism of translational upregulation of Kondo, the key E2 enzyme, at egg activation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    ClpAP proteolysis does not require rotation of the ClpA unfoldase relative to ClpP

    Sora Kim et al.
    Crosslinking the AAA+ protease interface does not abolish protein degradation by ClpAP, establishing that rotation of the AAA+ unfoldase with respect to its partner peptidase is not essential for activity.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure and mechanism of a phage-encoded SAM lyase revises catalytic function of enzyme family

    Xiaohu Guo et al.
    The first structure of a bacteriophage-encoded S-adenosyl methionine degrading enzyme was solved and demonstrated to catalyze a unimolecular lyase reaction occurring at the domain interface of a trimeric structure.
    1. Biochemistry and Chemical Biology

    CRISPR-Cas12a exploits R-loop asymmetry to form double-strand breaks

    Joshua C Cofsky et al.
    The DNA flanks on either side of an R-loop differ in stability, and CRISPR-Cas12 enzymes form double-strand breaks by targeting the more unstable flank with their single DNase active site.