title: RodZ, a component of the bacterial core morphogenic apparatus.
abstract: The molecular basis of bacterial cell morphogenesis remains largely an open question. Here we discover a morphogenic protein, RodZ, which is widely conserved across the bacterial kingdom. In Caulobacter crescentus, RodZ is essential for viability and is involved in all aspects of this organism's complex morphology. Depletion or over-production of RodZ results in grossly misshapen cells with stalk defects. RodZ exhibits a localization pattern during the cell cycle corresponding to sites of active peptidoglycan synthesis. The temporal transition of RodZ between patchy/helical and mid-cell localization mimics and depends on the actin-like MreB cytoskeleton. In Escherichia coli, an organism with a distinct mode of growth and MreB localization dynamics, RodZ follows MreB and retains its crucial role in cell morphogenesis, demonstrating conservation of function. Genomic analysis shows that RodZ represents an ancient function unique to bacteria. Multiple sequence alignment of 143 RodZ sequences from species across bacterial phyla identifies an N-terminal cytoplasmic domain with a helix-turn-helix motif, a transmembrane sequence, and a previously unidentified, conserved periplasmic or extracellular C-terminal domain. Both the N- and C-terminal domains are important for function, with the N-terminal domain containing localization determinants. This study uncovers a key missing player in the cytoskeleton-based growth machinery enabling heritable and defined cellular forms in bacteria.
authors.affiliation: Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06520, USA.
authors.forename: S Anisah
authors.initials: SA
authors.lastname: Alyahya
authors.forename: Roger
authors.initials: R
authors.lastname: Alexander
authors.forename: Teresa
authors.initials: T
authors.lastname: Costa
authors.forename: Adriano O
authors.initials: AO
authors.lastname: Henriques
authors.forename: Thierry
authors.initials: T
authors.lastname: Emonet
authors.forename: Christine
authors.initials: C
authors.lastname: Jacobs-Wagner
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D016935:Caulobacter crescentus / Q000166:cytology / Q000235:genetics / Q000254:growth & development*; D017124:Conserved Sequence; D004926:Escherichia coli / Q000378:metabolism; D005798:Genes, Bacterial; D023281:Genomics; D008969:Molecular Sequence Data; D009024:Morphogenesis; D016296:Mutagenesis; D010457:Peptidoglycan / Q000378:metabolism; D010802:Phylogeny; D017434:Protein Structure, Tertiary; D021381:Protein Transport
chemical_list: D001426:Bacterial Proteins; D010457:Peptidoglycan