BIO 123 Lecture Notes - Lecture 14: Amoebozoa, Heterokont, Origins Game Fair
Document Summary
Apparent sequence homologies with each other and with cellular organisms. Theories of origins: reduced cells, best example is giant dsdna viruses, escaped gene sets, best examples among the rna and retroviruses, role in rna world - hypothetical, phylogenetic studies consistent with both #1 and #2. Destroy up to 40% of the biomass per day. Play role in nutrient cycling by releasing cell contents. Made of phospholipid derived from host plasma membrane. Infection results in rapid production of new virus particles and lysis of host cell. Viral genome may incorporate into the cell genome and be replicated through the cell cycle. Lysis may not occur until after many cell generations or not at all. Double stranded dna is replicated using dna polymerase. Infect bacteria, archaea, stramenopiles, dinoflagellates, amoebozoa, arthropods, vertebrates. Herpesvirus, adenovirus, smallpox and cowpox ( variolae vaccinae. Giant dsdna viruses may be reduced from a prokaryotic cell. Mimiviruses and relative may represent fourth domain.
