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    1. Cell Biology

    Functional dichotomy and distinct nanoscale assemblies of a cell cycle-controlled bipolar zinc-finger regulator

    Johann Mignolet et al.
    Forward genetics and super-resolution microscopy identifies ZitP as a conserved multifunctional regulator that accumulates at both cell extremities in distinct macromolecular structures to perform different functions in the asymmetric model bacterium Caulobacter crescentus.
    1. Genetics and Genomics

    A regulatory pathway that selectively up-regulates elongasome function in the absence of class A PBPs

    Yesha Patel et al.
    Balanced peptidoglycan synthesis requires regulators, including sigma-I and WalKR, that coordinate the diffusive action of class A PBPs and the directional motion of the MreB-directed elongasome.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    E. coli TraR allosterically regulates transcription initiation by altering RNA polymerase conformation

    James Chen et al.
    Cryo-electron microscopy structures, combined with biochemical experiments, show how the E. coli F element-encoded TraR protein regulates transcription initiation by altering RNA polymerase conformation and conformational heterogeneity.
    1. Structural Biology and Molecular Biophysics

    Structures of two aptamers with differing ligand specificity reveal ruggedness in the functional landscape of RNA

    Andrew John Knappenberger et al.
    RNA aptamers that are closely related and share a common scaffold can readily adapt to recognize new ligands through changes in just a few nucleotides.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    The elemental mechanism of transcriptional pausing

    Jason Saba et al.
    Biochemical analyses of transcription complexes, including kinetic studies and probes of translocational and conformational states, establish the elemental mechanism of pausing, which underlies regulation of gene expression in all organisms.
    1. Microbiology and Infectious Disease

    Transcriptome dynamics of the Myxococcus xanthus multicellular developmental program

    José Muñoz-Dorado et al.
    Investigation of global gene expression profiles during formation of the Myxococcus xanthus specialized biofilm reveals a genetic regulatory network that coordinates cell motility, differentiation, and secondary metabolite production.
    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. Microbiology and Infectious Disease

    Heterogeneity in surface sensing suggests a division of labor in Pseudomonas aeruginosa populations

    Catherine R Armbruster et al.
    Subpopulations of polysaccharide producer and surface explorer cells play specialized roles in early Pseudomonas aeruginosa biofilm formation.
    1. Microbiology and Infectious Disease

    The genetic requirements of fatty acid import by Mycobacterium tuberculosis within macrophages

    Evgeniya V Nazarova et al.
    An unbiased forward genetic screen identified genes in Mycobacterium tuberculosis that are required for fatty acid import when the bacterium is residing within macrophages.
    1. Biochemistry and Chemical Biology

    Tandem riboswitches form a natural Boolean logic gate to control purine metabolism in bacteria

    Madeline E Sherlock et al.
    A riboswitch class has been discovered for phosphoribosyl pyrophosphate, the biochemical precursor of nucleotides, and this novel RNA sensor commonly operates in tandem with a guanine aptamer to function like a Boolean logic gate.