Download presentation
Presentation is loading. Please wait.
Published byMarsha Barrett Modified over 9 years ago
1
1 3/12/2016 Archaea: An Overview Hugh B. Fackrell
2
2 3/12/2016 Three Domains n Fossil Record & Morphology – Five Kingdoms- plants, animals, protistia, fungi, prokaryotes –Prokaryotes - Eubacteria, Archeobacteria n Cellular – Three kingdoms, – Eubacteria, Archaebacteria, Eukaryotes
3
3 3/12/2016 Domain n Level of organization above the kingdom level n Archaea (formerly Archaebacteria) n Bacteria ( formerly Eubacteria) n Eucarya (plants, animals, protista, fungi)
4
4 3/12/2016 Phylogeny
5
5 Archaea: Cell Membranes n lack fatty acids n contain ethers –gylcerol diethers, bilayers –Tetraethers form monolayers –Fixed number of carbons in hydrocarbons –flexibility via pentacylic rings n Large amounts of nonpolar lipids –isoprenoids eg squalene
6
6 3/12/2016 Archaea: Cell Walls n NO muramic acid n NO D amino acids n pseudopeptidoglycan (Methanobacterium) –N acetyltalosaminuronic acid n glycoprotein (Halobacterium) –highly negative charge balances positive charges of sodium n Protein
7
7 3/12/2016 Archaea: Genetics n Half size of bacterial genomes –1900 KB vs 4700 KB (E coli) n Bacterial Similarities –Polygenic mRNA –Shine-Dalgarno sequences for ribosome binding n Eucarya Similarities – RNA polymerase II
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.