Correction for 'The effect of wall depletion and hydrodynamic interactions on stress-gradient-induced polymer migration' by Hossein Rezvantalab et al., Soft Matter, 2016, 12, 5883-5897.
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| http://dx.doi.org/10.1039/c7sm90149f | DOI Listing |
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Two new enzymes that liberate undecaprenyl-phosphate to replenish the carrier lipid pool during envelope stress.
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Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA.
The 55-carbon isoprenoid, undecaprenyl-phosphate (UndP), is a universal carrier lipid that ferries most glycans and glycopolymers across the cytoplasmic membrane in bacteria. In addition to peptidoglycan precursors, UndP transports O-antigen, capsule, wall teichoic acids, and sugar modifications. How this shared but limited lipid is distributed among competing pathways is just beginning to be elucidated.
View Article and Find Full Text PDFSignal peptidase SpsB coordinates staphylococcal cell cycle, surface protein septal trafficking, and LTA synthesis.
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Department of Molecular Biosciences, College of Arts and Sciences; Center for Antimicrobial Resistance, University of South Florida, Tampa, Florida, USA.
Unlabelled: Cell wall-anchored surface proteins of Gram-positive bacteria, harboring a highly conserved YSIRK/G-S signal peptide (SP), are deposited at cell division septum and anchored to septal peptidoglycan. The mechanisms supporting YSIRK protein septal trafficking remain elusive. Previously, we identified that LtaS-mediated lipoteichoic acid (LTA) synthesis restricts septal trafficking of YSIRK+ proteins in .
View Article and Find Full Text PDFThe interplay between ZigA and SltB promotes zinc homeostasis and cell envelope integrity.
Infect Immun
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Department of Pathology Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
is an opportunistic human pathogen that acquires nutrient metals from the vertebrate host amid infection. During zinc (Zn) scarcity, upregulates the expression of the predicted Zn metallochaperone, . Loss of compromises fitness during Zn deficiency, highlighting its role in this condition.
View Article and Find Full Text PDFInhibition of vascular smooth muscle cell PERK/ATF4 ER stress signaling protects against abdominal aortic aneurysms.
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Section of Vascular Surgery, Department of Surgery, and.
Abdominal aortic aneurysms (AAA) are a life-threatening cardiovascular disease for which there is a lack of effective therapy preventing aortic rupture. During AAA formation, pathological vascular remodeling is driven by vascular smooth muscle cell (VSMC) dysfunction and apoptosis, for which the mechanisms regulating loss of VSMCs within the aortic wall remain poorly defined. Using single-cell RNA-Seq of human AAA tissues, we identified increased activation of the endoplasmic reticulum stress response pathway, PERK/eIF2α/ATF4, in aortic VSMCs resulting in upregulation of an apoptotic cellular response.
View Article and Find Full Text PDFGrapevine cell response to carbon deficiency requires transcriptome and methylome reprogramming.
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Ecophysiologie et Génomique Fonctionnelle de la Vigne (EGFV), University of Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, Villenave d'Ornon, France.
Sugar limitation has dramatic consequences on plant cells, which include cell metabolism and transcriptional reprogramming, and the recycling of cellular components to maintain fundamental cell functions. There is however no description of the contribution of epigenetic regulations to the adaptation of plant cells to limited carbon availability. We investigated this question using nonphotosynthetic grapevine cells (, cv Cabernet Sauvignon) cultured with contrasted glucose concentrations.
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