Lect 10 - Structural differences amongst microbes Learning...

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Structural differences amongst microbes
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Learning goals Achaea are structurally very different Different mechanisms of nutrient uptake Role of bacteria in the evolution of eukaryotes
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Phylogenetic tree
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Much in common Membranes are conserved Structure/function of DNA Sequence of transcription/translation Proteins that perform the same function often have similar sequence and structure
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cows R. sphaeroides Cytochrome oxidase
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Structural comparisons Property Eukarya Archaea Bacteria Organelles yes no no Mode of uptake endocytosis transport by membrane proteins transport by membrane proteins Multicellular yes no no RNA polymerase 12 proteins 9-12 proteins 4 proteins Ribosome 80S 70S 70S Cell walls none or cellulose proteins, pseudomurien, lattice None or Gram (-) or (+) Lipids ester-linked ether-linked ester-linked Cytoskeleton Microfilaments and microtubules FtsZ and MreB FtsZ and MreB
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Nostoc spp. http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artoct01/pjnostoc.html Larger Able to have more genes Large genome (8.9 Mbp) Nostoc punctiforme trichome s
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Eukaryotic organelles Golgi apparatus Lysosomes Nucleus Endoplasmic reticulum Mitochondria Plastids
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Bacterial compartments The Thiobacillus carboxysome Bobik, T.A. Bacterial microcompartments. 2007. Microbe 2:25-31
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S. Tanaka et al., Science 319, 1083 -1086 (2008) Carboxysome architecture and operon organization
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Tanaka et al.,
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This note was uploaded on 04/07/2009 for the course MICROBIO 303 taught by Professor Kaspar/escalnte/downs during the Spring '09 term at Wisconsin.

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Lect 10 - Structural differences amongst microbes Learning...

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