Bacterial Peptidoglycan

2007: Q7 - Write an essay on the structure and function of bacteriuml peptidoglycan Peptidoglycan is a polymer unique to prokaryotic cells consisting of polysaccharide and polypeptide chains. It is a peck component of bacterial cell walls. Structure: Peptidoglycan is a highly crosslinked macromolecule. A disaccharide repeat region of N-Acetyl Muramic Acid and N-Acetyl Glucosamine forms its backbone. The presence of murein indicates that this is bacterial peptidoglycan as murein is never found in Archaea. Descending from the N-Acetyl Muaramic molecules be lypoproteins (stem peptides) consisting of D and L Amino Acids. A pentaglycine cross coupling joins the D-alinine and L-lysine Amino Acids, inter-linking the Disaccharide repeat regions. Teichoic acids are embedded in the germ plasm membrane (not shown in the diagram) they interweave through the peptidoglycan, attaching it to the bacterial cell. hypertext guide protocol://www.google.ie/imgres?q=peptidoglycan+diagram&h l=en&client=firefox-a&hs=5Jg&sa=X&rls=org.mozilla:en-US: appointed&biw=1173&bih=511&tbm=isch&prmd=imvns&tbnid=5DRtvUra9oY01M:&imgrefurl=http://pathmicro.med.sc.edu/fox/cell_envelope.htm&docid=0aWG7veP-RdY0M&imgurl=http://pathmicro.med.sc.edu/fox/sa-pep.

jpg&w=567&h=488&ei=NSxVT6jrAYPvsgb85OzhCw& heave=1&iact=hc&vpx=308&vpy=43&dur=4075&hovh=208&hovw=242&tx=128&ty=119&sig=112218279809207804119&page=1&tbnh= cxlv&tbnw=168& expire=0&ndsp=10&ved=1t:429,r:1,s:0 Peptidoglycan structure is slightly diametric between Gram lordly bacteria (usually stain rarefied when Gram stained) and Gram proscribe bacteria (usually stain privation when Gram stained). In Gram co! nfident(p) bacteria, such as Staphylococcus aureus, the peptidoglycan layer is much thicker than in Gram ostracize bacteria. Unlike Gram negative bacteria, Gram positive bacteria have no outer membrane. Antibiotics such as penicillin and ampicillin can be used to treat infections involving gram positive bacteria. These antibiotics stop the formation of the peptide cross bridges in...If you want to define a full essay, order it on our website: OrderCustomPaper.com

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