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  • Bacteria
  • Streptococcus mutans are gram-positive cocci shaped bacteria. (kenyon.edu)
  • When S. mutans is detected in the furrows of the tongue it is concluded that the vertical transmission route for the bacteria from mother to child arises shortly after birth. (kenyon.edu)
  • S. mutans is a coccoid shaped, Gram-positive, facultative anaerobic bacteria that is part of the normal bacteria flora of the mouth. (sciencephoto.com)
  • The pathways were deduced from (i) the analysis of S. mutans genome sequence data ( http://www.ncbi.nlm.nih.gov/genomes ), (ii) knowledge of sulfur amino acid biosynthetic pathways in other bacteria, such as L. lactis ( 41 ), and (iii) the experimental results of this work. (asm.org)
  • On Earth, coffee is known to kill or diminish the growth of S. mutans , a bacteria commonly found in the human mouth, and so may support better dental hygiene. (nasa.gov)
  • This student-developed investigation grows S. mutans aboard the space station and exposes it to coffee to determine the effect on the bacteria in microgravity. (nasa.gov)
  • Drinking Coffee in Space: The Impact of Microgravity on Streptococcus mutans on Susceptibility to Coffee (SmCoffee) is a student investigation that studies the effect of cavity-causing bacteria on teeth in a space environment. (nasa.gov)
  • Of the hundreds of different types of bacteria living in your mouth, only a handful are thought to cause gum disease, but only Strep Mutans is implicated as the main cause of dental decay. (dentist.net)
  • Genes
  • The purpose of this study was to dissect the role of selected clp genes in the stress responses of S. mutans , with a particular focus on acid tolerance and adaptation. (asm.org)
  • Homologues of the clpB , clpC , clpE , clpL , clpX , and clpP genes were identified in the S. mutans genome. (asm.org)
  • MetR (formerly Smu.1225), a regulator of the LysR family, controls key genes for methionine supply in Streptococcus mutans . (asm.org)
  • gtfB
  • The secretion of sticky substances from the surface of S. mutans colonies and gtfB gene expression also decreased in the xylitol group. (springer.com)
  • infect
  • With regard to the assumption that the mothers mainly infect their children with mutans streptococci, so the spoons, the pacifiers or the nipples from baby bottles licked off first are being possible for the transmission. (springer.com)
  • genetic
  • To prove this, saliva samples of two to five year old children were taken, which revealed a high fidelity in genetic make-up of each host's S. mutans population. (kenyon.edu)
  • synthesis
  • The expression or biological activity of S. mutans P1 can be influenced by multiple gene products, including luxS , encoding the synthesis for autoinducer 2 (AI-2) ( 30 ), ropA , encoding a peptidyl-prolyl isomerase ( 7 ), and srtA , encoding the sortase enzyme that covalently couples LPXTG-containing proteins, including P1, to the cell wall ( 13 , 17 ). (pubmedcentralcanada.ca)
  • grown
  • S. mutans strain MT8148 was grown in the presence of recombinant RecA (rRecA) protein, after which smooth colonies were isolated. (hindawi.com)
  • Comparisons between S. mutans grown in normal gravity and microgravity are drawn. (nasa.gov)
  • aggregation
  • Another study found that simulated microgravity has a significant effect on S. mutans physiology including a substantial increase in cellular aggregation as well as susceptibility to killing by hydrogen peroxide (H 2 O 2 ). (nasa.gov)
  • minimum inhibitory co
  • This includes determining the minimum inhibitory concentration of coffee for S. mutans , which was found to be at ¼ of the recommended strength of the commercially available instant coffee powder that is used in the investigation. (nasa.gov)
  • Regulation
  • While the molecular mechanisms underlying the control of carbohydrate acquisition, acid production, and adaptation to low pH by S. mutans have been the focus of a substantial number of studies, the role of oxygen in fundamental aspects of gene regulation and physiologic homeostasis is poorly understood. (pubmedcentralcanada.ca)
  • These data suggest a common mechanism for the regulation of the methionine supply in streptococci. (asm.org)